Owner`s Manual Cobramatic® II Wire Feed Cabinet
Contents
1. 8 yS1a 6500 27 Cobramatic II Owner s Manual Page 26 Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings ALABAMA AIRGAS SOUTH INC Birmingham AL 205 251 6835 DIXIE WELDING SUPPLY Attalla AL 256 538 6157 INDUSTRIAL WELDING SERVICES Quinton AL 205 674 3258 KIBRO INC Theodore AL 251 653 4672 WELDING ENGINEERING SUPPLY CO Prichard AL 334 457 8681 WELDING MACHINE HOSPITAL Montgomery AL 334 832 9353 ALASKA FAIRBANKS AERO SERVICES Fairbanks AK 907 479 6666 RNR INC dba Rubey Engine amp Electric Anchorage AK 907 336 5152 ARIZONA PRAXAIR DISTRIBUTION INC Phoenix AZ 602 269 2151 ALLSTATE ELECTRIC MOTOR CO Phoenix AZ 602 233 0500 VERN LEWIS WLDG SUPPLY Phoenix AZ 602 252 0341 ARKANSAS APPLIED SERVICES INC Benton AR 501 860 6464 ARKANSAS WELDING IND L SUPPLY Hot Springs AR 501 321 9922 EL DORADO WELDING amp IND L SUPPLY El Dorado AR 870 863 4088 CALIFORNIA ADVANCED WELDER REPAIR Commerce CA 323 263 7383 AIRGAS WEST INC Gardena CA 310 523 9355 ALL PHASE WELDER REPAIR amp CONSULTING Sacramento CA 916 331 0595 ARC PRODUCTS San Diego CA 619 628 1022 ARCO WELDER REPAIR Santa Fe Springs CA 562 921 5240 ARK WELDER REPAIR Fresno CA 559 292 4714 CAL WELD SUPPLY Fresno2. Network S2 Cobramatic Il circuit provides for linear control of the wire feed from less than one volt to ten volts The torch compensating network is provided to match the torch motor gearbox ratio to the 0 10VDC linear control Therefore regardless of which type of torch is used one volt will equal 100 ipm two volts equals 200 ipm etc To set up the network for the torch you are using locate dip switch 2 S2 in the upper left corner of the Main PC Board and set as follows NOTE Only one switch may be ON at a time Cobramatic 11 Owner s Manual 7 SwitcH 2 Settines S2 Position 1 System Torches 800ipm Cobra Gold Torches 5 RoboKing Torches du Python en CobraMax N Prince 750ipm x King Cobra 700ipm Prince XL not used future During Start Run In Interval the network is bypassed to permit very smooth slow run in to be achieved See wire feed calibration section for torch calibration procedure Operation FIG 5 The Cobramatic cabinet may be set up to operate in a wide variety of automatic and semi automatic applications The remote input output connector J22 provides the electrical interface to your equipment When the Cobramatic is used in this capacity timer kit P N 005 0196 should be installed to provide control of the gas as well as spot time and burn back
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6. PRODUCTS Product Manual Serial Voltage Rating Revision Model Number CobramaticIl gt Cobramatic Wire Feed Cabinet Owner s Manual Cobramatic 11 Cabinet 091 0392 03040001 42 VAC 100 VAC April 2003 Rev D 150 004 150 204 6 SAFETY CONSIDERATIONS ELECTRIC ARC WELDING EQUIPMENT CAUTION READ BEFORE ATTEMPTING INSTALLATION OPERATION OR MAINTENANCE OF THIS EQUIPMENT 1 1 INTRODUCTION This equipment is intended for ultimate application by commercial industrial users and for operation by persons trained and experienced in the use and maintenance of welding equipment Operation should not be undertaken without adequate training in the use of such equipment Training is available from many public and private schools or similar facilities Safe practices in the installation opera tion and maintenance of this equipment requires proper training in the art a careful study of the information provided with the equipment and the use of common sense Rules for safe use are generally provided by suppliers of welding power sources compressed gas suppliers and electrode suppliers Careful compliance with these rules will promote safe use of this equipment The following Safety Rules cover some of the more generally found situations READ THEM CAREFULLY In case of any doubt obtain qualified help before proceeding 1 2 GENERAL PRECAUTIONS A Burn Prevention ELECTRIC
7. CA 209 445 0131 DELTA TECH Sun Valley CA 818 767 4234 EMCO EAST WELD R REPAIR Concord CA 925 798 4411 FRESNO OXYGEN Fresno CA 559 233 6684 INDUSTRIAL ELECTRICAL CO Modesto CA 209 527 2800 INDUSTRIAL WELDER REPAIR LaPuente CA 626 961 7643 NESCO WELDING SUPPLY Fontana CA 909 427 9670 PRAXAIR DISTRIBUTION ARC RENTS Signal Hill CA 562 989 3212 PRAXAIR DISTRIBUTION INC Bakersfield CA 661 321 9922 R J KATES San Diego CA 619 565 6960 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings RED D ARC INC Carson CA 310 233 3327 SIMS ORANGE WELDING SUPPLY Santa Ana CA 714 549 9393 SOUTHWEST WELDER REPAIR Fontana CA 909 357 1661 SWEINHART ELECTRIC CO INC Long Beach CA 714 521 9100 COLORADO AIRGAS INTERMOUNTAIN INC Colorado Springs CO 719 473 1947 WELDERS amp EQUIP SVC amp TESTING Littleton CO 303 932 8755 WESTERN SLOPE WELDER REPAIR Grand J unction CO 970 243 9616 CONNETICUT ABCO WELDING amp INDUSTRIAL SUPPLY CO Waterford CT 800 962 0285 TECH AIR Milford CT 203 783 1834 DELAWARE KEEN COMPRESSED GAS New Castle DE 302 594 4555 FLORIDA A amp I SPECIALTIES Lehigh Acres FL 941 368 7435 AAA GENERATOR amp PUMP Ft Myers FL 941 332 1136 ACTION WELDING SUPPLY Jacksonville FL 904 786 2254 AMVEL C
8. Wire Feed Rate Depending on Torch used 10 1000 ipm Weight 31 pounds Shipping Weight 37 pounds Compatible Torches All MK 7pin Amphenol Plug Mig Torches MK RoboKing Automated Torch Support EquipMENT REQUIRED MK 2000A Power Supply or any C V or C C power source of sufficient capacity for your needs Regulated gas supply and hoses Properly sized power leads from power source to wire feeder and ground Water source and hose capable of providing a minimum of 1 qt min at 45 p s i when using water cooled torches CooLANT RECOMMENDATIONS Use a name brand additive which does not contain reactive sulphur or chlorine and does not react with copper brass or aluminum Here s also mixture that works well Use 3 Gallons 11 4 Liters deionized water NOT DISTILLED Use 1 Gallon 3 8 Liters ethleyne glycol Use 1 tsp 5 ml liquid glycerin per gallon 3 8 Liters of mixture Check coolant periodically to remain within limits of the following Coolant Flow rate 1 quart minute at 45 p s i Resistivity 10K ohms centimeter Ph Range 5 5 8 5 Particle Size 005 MacHiNE GROUNDING The Cobramatic ll and GMAW wire feeders are ground to the power source through the input cable The power source grounding terminal must be properly connected to electrical ground per the power source operating manual Location The cabinet should be placed in a location where it can be protected from damage Lead lengths and acces
9. functions see optional kits PERFORMANCE amp FAULT ISOLATION INDICATORS GENERAL The Cobramatic is equipped with LED indicators to aid in operation and trouble shooting The indicators check out individual circuits respond to signals and indicate overload conditions DETAILED OPERATION When the cabinet is turned ON D6 and D10 both green LED s will light D6 indicates that 27VAC is being supplied to the board and D10 indicates the presence of the 10VDC When the trigger signal is supplied either from the torch or remotely D21 trigger a yellow LED will light After the pre purge times out D19 wire forward D34 torch motor voltage and D31 Slave motor voltage all yellow LED s will light and the welding wire will begin to feed Note If the timer kit P N 005 0196 is not installed D19 wire forward D34 torch motor voltage and D31 115vac indicators will light with the trigger signal D34 indicates the presence of the torch motor voltage whereas D31 indicates the presence of AC voltage for the brake solenoid and slave motor When the arc is initiated D17 arc establish a yellow LED will light and remain on until the arc is extinguished D39 ared LED when lit indicates a torch overload condition has occurred Turn main power switch OFF then back to reset See trouble shooting section for more information Wire FEED CALIBRATION PROCEDURE CALIBRATION INSTRUCTIONS Co
10. supply the information you have recorded above Read this Owner s Manual completely before attempting to use this equipment Save this manual and keep it handy for quick reference Pay particular attention to the safety instructions we have provided for your protection Cobramatic II Owner s Manual Table of Contents Safety Guidlines Installation Technical Specifications Machine Grounding Machine Location Contactor Selection Input Power Connections Wire Threading Procedure Torch Drive Roll Adjustment Operation General Description Controls and Settings Controls for Optional Timer Kit Controls for Optional Meter Kit Posa Start Operating Procedure Remote Automatic Operation Performance and Fault Isolation Indicators Wire Feed Calibration Procedure Accessories Optional Kits Maintenance Routine Maintenance Recommended Spare Parts Testing the Torch Testing the 115VAC Circuits Troubleshooting Slave Motor Tension Test Troubleshooting Main Board Troubleshooting Guide Appendices Figures Exploded Parts View Electrical Schematics Warranty Repair Stations Safety Warnings Warranty Cobramatic II Owner s Manual THI S PAGE INTENTI ONALLY BLANK Cobramatic II Owner s Manual Section A INSTALLATION TECHNICAL SPECIFICATIONS Wire Diameter Capacity 030 1 16 ALL Types Wire Capacity 12 Standard Insulated or Non Insulated Power Input 42 VAC 50 60 Hz 110 VAC 50 60 Hz 150 Watts Peak
11. circuit or in ungrounded electrically HOT equipment can fatally shock a person whose body becomes a conductor DO NOT STAND SIT LIE LEAN ON OR TOUCH a wet surface when welding without suitable protection To protect against shock Keep body and clothing dry Never work in damp area without adequate insulation against electrical shock Stay on a dry duckboard or rubber mat when dampness or sweat cannot be avoided Sweat sea water or moisture between body and an electrically HOT part or grounded metal reduces the body surface electri cal resistance enabling dangerous and possibly lethal currents to flow through the body 1 Grounding the Equipment When installing connect the frames of each unit such as welding power source control work table and water circulator to the building ground Conductors must be adequate to carry ground currents safely Equipment made electrically HOT by stray currents may shock possibly fatally Do NOT GROUND to electrical conduit or to a pipe carrying ANY gas or a flammable liquid such as oil or fuel Three phase connection Check phase requirement of equipment before installing If only three phase power is available connect single phase equipment to only two wires of the three phase line Do NOT connect the equipment ground lead to the third live wire or the equipment will become electrically HOT a dangerous condition that can shock possibly fatally Before welding ch
12. devices such as interlocks and circuit breakers should not be discon nected or shunted out Before installation inspection or service of equipment shut OFF all power and remove line fuses or lock or red tag Switches to prevent accidental turning ON of power Disconnect all cables from welding power source and pull all 115 volts line cord plugs Do not open power circuit or change polarity while welding lf in an emer gency it must be disconnected guard against shock burns or flash from switch arcing Leaving equipment unattended Always shut OFF and disconnect all power to equipment Power disconnect switch must be avail able near the welding power source For selecting a quality product We want you to take QU pride in operating this product as much pride as we have in bringing the product to you Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped title passes to the purchaser upon receipt by the carrier Consequently claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment is received Please record your equipment identification information below for future reference This information can be found on your machine nameplate Model Name amp Number Code amp Serial Number Date of Purchase Whenever you request replacements parts for or information on this equipment always
13. is struck Looking at an arc momentarily with unprotected eyes particularly a high intensity gas shielded arc can cause a retinal burn that may leave a permanent dark area in the field of vision 3 Protection of Nearby Personnel Enclose the welding area For production welding a separate room or enclosed bay is best In open areas surround the operation with low reflective noncom bustible screens or panels Allow for free air circulation particularly at floor level Viewing the weld Provide face shields for all persons who will be looking directly at the weld Others working in area See that all persons are wearing flash goggles Before starting to weld make sure that Screen flaps or bay doors are closed B Toxic Fume Prevention Comply with precautions in 1 2B Generator engine exhaust must be vented to the outside air Carbon monoxide can kill C Fire and Explosion Prevention Comply with precautions in 1 2C Equipment s rated capacity Do not overload arc welding equipment It may overheat cables and cause a fire Loose cable connections may overheat or flash and cause Never strike an arc on a cylinder or other pressure vessel It creates a brittle area that can cause a violent rupture or lead to such a rupture later under rough handling D Compressed Gas Equipment Comply with precautions in 1 2D E Shock Prevention Exposed electrically hot conductors or other bare metal in the welding
14. valves from bumps falls falling objects and weather Replace caps securely when moving cyl inders Stuck valve Do NOT use a hammer or wrench to open a cylinder valve that cannot be opened by hand Notify your supplier Mixing gases NEVER try to mix any gases in a cylinder NEVER refill any cylinder Cylinder fittings should never be modified or exchanged 3 Hose Prohibited use Never use hose other than that designed for the specified gas A general hose identification rule is red for fuel gas green for oxygen and black for inert gases Use ferrules or clamps designed for the hose not ordinary wire or other substitute as a binding to connect hoses to fittings No copper tubing splices Use only stan dard brass fittings to splice hose Avoid long runs to prevent kinks and abuse Suspend hose off ground to keep it from being run over stepped on or otherwise damaged Coil excess hose to prevent kinks and tangles Protect hose from damage by sharp edges and by sparks slag and open flame Examine hose regularly for leaks wear and loose connections Immerse pressured hose in water bubbles indicate leaks Repair leaky or worn hose by cutting area out and splicing Do NOT use tape 4 Proper Connections Clean cylinder valve outlet of impurities that may clog orifices and damage seats before connecting regulator Except for hydrogen crack valve momentarily pointing outlet away from people and s
15. 17 03 Please visit www mkproducts com for most up to date listings NEVADA SIERRA WELDING SUPPLY CO Sparks NV 775 359 0542 NEW ERSEY INDUSTRIAL ELECTRIC SERVICE CO Hawthorne NJ 973 423 1212 NEW YORK DELO WELDING SUPPLY Syracuse NY 315 478 2188 DYNAMIC WELD G amp REPAIR Bayshore NY 631 643 1308 HAUN WELDING SUPPLY Syracuse NY 315 463 5241 JACKSON WELDING SUPPLY Rochester NY 585 235 2920 NORTH CAROLINA ADAMS WELDER REPAIR amp ELECTRICAL SERVICE INC Nashville NC 252 459 1960 HOLOX LTD Colfax NC 336 996 1974 M amp L WELDER REPAIR Asheville NC 828 250 9353 MACHINE AND WELDING SUPPLY CO Dunn NC 910 892 4016 MACHINE AND WELDING SUPPLY CO Greenville NC 252 752 3089 MACHINE AND WELDING SUPPLY CO Raleigh NC 919 772 9500 MACHINE AND WELDING SUPPLY CO Winston Salem NC 336 723 9651 NATIONAL WELDERS SUPPLY CO High Point NC 910 882 1110 NATIONAL WELDERS SUPPLY CO Charlotte NC 704 392 7317 OHIO AGA GASES INC Lima OH 419 228 2828 ALBRIGHT WELDING SUPPLY Wooster OH 330 264 2021 ALL ABOUT SERVICE Wickliffe OH 440 516 0303 ARC EQUIPMENT COMPANY Struthers OH 333 750 9353 SERVICES INC Toledo OH 419 478 6204 BELAIR PRODUCTS INC Akron OH 330 253 3116 BIG RIVER ELECTRIC Gallipolis OH 740 446 4360 CnD MACHINE INC Canton OH 330 478 8811 ELECTRIC WELDER REPAIR Cuyahoga Heights OH 216 2
16. 5 7508 MASSACHUSETTS AIMTEK WELDING SUPPLY Auburn MA 508 832 5035 MICHIGAN ANN ARBOR WELDING SUPPLY CO Ypsilanti MI 734 572 0444 APEX WELDING GASES amp SUPPLY Muskegon Heights MI 616 722 3185 AUTOMATIC WELD Midland MI 517 496 9245 GREAT LAKES EQUIPMENT Clare MI 517 386 4630 HAMILTON ELECTRIC CO Saginaw MI 517 799 6291 PLYMOUTH WAYNE INC Wixom MI 248 735 7700 SAGINAW WELDING SUPPLY CO Saginaw MI 517 793 9696 SIMPKINS ELECTRICAL SVC Michigan Center MI 517 764 7766 SOUTHPARK WELDING Marysville MI 810 364 6521 WELDING METALS INC Madison Heights MI 248 585 0480 WESAR COMPANY Three Rivers MI 616 483 9125 WILSON WELDING amp MEDICAL GASES Warren MI 586 751 7400 MINNESOTA AIRGAS NORTH CENTRAL Albert Lea MN 507 373 2411 CAPITOL CITY WELDING SUPPLY St Paul MN 651 224 4843 CENTRAL McGOWAN St Cloud MN 320 252 5292 MINNEAPOLIS OXYGEN CO Minneapolis MN 612 588 8855 OXYGEN SERVICE CO St Paul MN 612 644 7273 MISSOURI CEE KAY SUPPLY INC St Louis MO 324 644 3500 P G WALKER Springfield MO 417 862 1745 ROD S SERVICE INC St Louis MO 314 721 6000 MISSISSIPPI NORDAN SMITH WELDING SUPPLY Hattiesburg MS 601 545 1800 3D SUPPLIES INC J ackson MS 601 353 3330 MONTANA VALLEY WELDERS SUPPLY Billings MT 406 256 3330 Cobramatic II Owner s Manual Warranty Repair Stations as of 04
17. 501 0207 2 Fuse AGC 2A 250V 151 0001 TESTING THE TORCH Motor CHECK Remove the amphenol connector from the cabinet Using the torch amphenol check the resistance across pins A and B motor leads The resistance across the motor should be between 5 10 ohms If an open circuit or short exist check the motor leads and motor independently PoTENTIOMETER W CLOcKED Using the torch amphenol check the resistance across pin D wiper and pin The resistance should vary from 0 5K ohms Check the resistance across pin D wiper and The resistance should vary from 5K 0 ohms THE Micro SwitcH Using the torch amphenol check for continuity across pins E and F when the trigger is pressed TEsriNG THE 115 VAC Circuits The 115 VAC circuit is protected by fuse F3 If F3 continually blows remove J10 Brake Solenoid J12 slave motor and J15 3 4 115 VAC Contactor from the P C Board Replace fuse and retrigger system If fuse does not blow isolate the problem by plugging in J10 J12 and J15 3 4 one at a time until the fuse blows Cobramatic II Owner s Manual Page 10 SEcTION E TROUBLESHOOTING Regardless of which torch or feeder used all MK Products push pull guns operate on the same principle The 115VAC slave motor in the feeder runs at a fast constant speed but has very low torque It is always trying to feed m
18. 71 5600 MAINTENANCE UNLTD amp TOOL REPAIR Cincinnati OH 513 554 1313 O E MEYER CO Sandusky OH 419 621 4201 OHIO AIR PRODUCTS Canton OH 330 821 2771 RICK S WELDER REPAIR SERVICE Eastlake OH 440 269 1204 S D NOLD INC Lisbon OH 330 424 3134 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings VALLEY NATIONAL GASES Cincinnati OH 513 241 5840 VALLEY NATIONAL GASES Hilliard OH 614 771 1311 VALLEY NATIONAL GASES Lima OH 419 228 1008 VALLEY NATIONAL GASES Toledo OH 419 241 9114 VOLLMER ELECTRIC CO Columbus OH 614 476 8800 WEILER WELDING CO INC Dayton OH 937 222 8312 WELDINGHOUSE INC Cleveland OH 216 524 1955 OKLAHOMA AIRGAS MID SOUTH Tulsa OK 918 582 0885 BILL S WELDER REPAIR Oklahoma City OK 405 232 4799 MUNN SUPPLY Enid OK 580 234 4120 OKLAHOMA WELDERS SUPPLY Madill OK 580 795 5561 OREGON ARC SYSTEMS SERVICES Central Point OR 541 665 2676 EC COMPANY dba ELECTRICAL CONSTRUCTION CO Portland OR 800 452 1511 INDUSTRIAL SOURCE Eugene OR 541 344 1438 WELDER SERVICE amp REPAIR Redmond OR 541 548 8711 PENNSYLVANIA ALLWELD EQUIPMENT REPAIR Pittsburgh PA 412 821 8460 BY DESIGN Columbia PA 717 681 9494 GEOVIC WELDING SUPPLY Milton PA 717 742 9377 J A CUNNINGHAM EQUIPMENT INC Philadelphia
19. 8 6255 BARRY HAMEL EQUIPMENT LTD Coquitlam B C 604 945 9313 D TECH WELD SERVICES Regina Saskatchewan 306 586 9353 ELECTRO M CANIK INC Sainte Foy Quebec 418 683 1724 GPR INDUSTRIES 1994 LTD Grande Prairie Alberta 780 532 5900 HYPERDYNAMICS TECHNOLOGIES LTD Pickering Ontario 905 683 9938 INDUSTRIAL ELECTRONIC SERVICES Calgary Alberta 403 279 3432 LADEL LTD Quebec 819 376 6577 LeBLANC ELECTRO TECH INC Boucherville Quebec 450 449 5244 M R T REPAIR CENTER INC Montreal Quebec 514 648 0800 OZARK ELECTRICAL MARINE LTD St Johns Newfoundland 709 726 4554 PEEL ENGINES Mississauga Ontario 905 670 1535 PROMOTECH LECTRIQUE INC Fleurimont Quebec 819 822 2111 WELDERS SUPPLY Winnipeg Manitoba 204 772 9476 WELDERTECH Calgary Alberta 403 279 3432 WELDTEC B C 604 545 3886 CHINA PHT Group Company Beijing China 86 10 6858 8395 Cobramatic II Owner s Manual Spanish AVISO DE PRECAUCION French ATTENTION German WARNUNG Portuguese Do not touch electrically live parts or electrode with skin or wet clothing Insulate yourself from work and ground No toque las partes o los electrodos bajo carga con piel o ropa moja da Aislese dei trabajo y de la tierra Ne laissez ni la peau ni des v te ments mouill s entrer en contact avec des pi ces sous tension Isolez vous du travai
20. ARC WELDING PRODUCES HIGH INTENSITY HEAT AND ULTRA VIOLET RADIANT ENERGY WHICH MAY CAUSE SERIOUS AND PER MANENT EYE DAMAGE AND WHICH MAY DAMAGE ANY EXPOSED SKIN AREAS Wear helmet with safety goggles or glasses with side shields underneath appropriate filter lenses or plates pro tected by clear cover glass This is a must for welding or cutting and chipping to protect the eyes from radiant energy and flying metal Replace cover glass when broken pitted or spattered Medical first aid and eye treatment First aid facilities and a qualified first aid person should be available for each shift unless medical facilities are close by for immediate treatment of flash burns of the eyes and skin burns Wear protective clothing leather or asbestos gauntlet gloves hat and high safety toe shoes Button shirt collar and pocket flaps and wear cuffless trousers to avoid entry of sparks and slag Avoid oily or greasy clothing A spark may ignite them Flammable hair preparations should not be used by persons intending to weld or cut Hot metal such as electrode stubs and work pieces should never be handled without gloves Ear plugs should be worn when working on overhead or in a confined space A hard hat should be worn when others work overhead B Toxic Fume Prevention WARNING The use of this product may result in exposure to chemicals known to the State of California to cause cancer and birth defects or other repro
21. B HSER 35 BB 3 sp JR J hi 5 Amo SUAS SIASAT HAY SAL ETSI NET EC aly aint lated Cobramatic II Owner s Manual LIMITED WARRANTY Effective March 1 2001 This warranty supersedes all previous MK Products warranties and is exclusive with no other guarantees or warranties expressed or implied LIMITED WARRANTY MK Products Inc Irvine California warrants that all new and unused equipment furnished by MK Products is free from defect in workmanship and material as of the time and place of delivery by MK Products No warranty is made by MK Products with respect to trade accessories or other items manufactured by others Such trade accessories and other items are sold subject to the warranties of their respective manufacturers if any MK Products warranty does not apply to components having normal useful life of less than one 1 year such as relay points wire conduit tungsten and welding torch parts that come in contact with the welding wire including nozzles nozzle insulators and contact tips where failure does not result from defect in workmanship or material In the case of MK Products breach of warranty or any other duty with respect to the quality of any goods the exclusive remedies therefore shall be at MK Products option 1 repair 2 replacement 3 where authorized in writing by MK Products the reasonable cost of repa
22. MERICA INC Evansville IN 800 424 8905 B amp H ELECTRIC Seymour IN 812 522 5607 COX EQUIPMENT COMPANY Indianapolis IN 317 241 8881 EVANSVILLE ARMATURE INC Evansville IN 812 428 9034 HARRISON ELECTRIC INC Michigan City IN 219 879 0444 MODERN SUPPLY CO INC Evansville IN 812 425 9353 PRAXAIR DISTRIBUTION INC Speedway IN 317 481 4550 SUTTON GARTEN COMPANY Indianapolis IN 317 264 3236 IOWA AIRGAS NORTH CENTRAL Des Moines IA 515 266 1111 CEDAR RAPIDS WELDING SUPPLY Cedar Rapids IA 319 365 1466 ELECTRICAL ENGRG amp EQUIPMENT Des Moines IA 515 266 8890 SUPERIOR WELDING SUPPLY Waterloo IA 319 236 9660 WRIGHT WELDING SUPPLY Ft Dodge IA 515 576 0640 KANSAS AEROFORM CORPORATION Coffeyville KS 620 251 1430 KANOX Hutchinson KS 316 665 5551 KENTUCKY GENERAL WELDING PRODUCTS Louisville KY 502 635 5218 RED D ARC Lexington KY 800 245 3660 WELDING EQUIPMENT Louisville KY 502 636 0545 LOUISIANA GT SVCS OF MORGAN CITY Morgan City LA 985 385 4135 RED BALL OXYGEN CO Shreveport LA 318 425 3211 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings WELDERS EQUIPMENT CO Broussard LA 337 837 5701 WELDERS SUPPLY amp EQUIP Port Allen LA 225 346 4712 MARYLAND ELEC REPAIR SERVICE Owings MD 301 85
23. OPERATION Attach Cobramatic Il to CV power source according to the installation instructions Turn the Cobramatic II to the ON position and the Start to the OFF position Adjust power source to desired voltage for your weld condition Depress gun trigger and adjust wire feed speed to match voltage setting If approximate wire feed is not known it is better to start with excess wire feed rather than too little in order to prevent a burn back Turn the Posa Start switch to the ON position Press torch trigger and using Run in Speed Control adjust wire feed rate to approximately 1096 of the welding wire speed Strike an arc and adjust wire feed rate at gun until correct condition is achieved CC Posa Start OPERATION Attach the Cobramatic to CC power source according to the installation instructions Cobramatic Owner s Manual Page 6 Insure power supply high frequency switch is in the OFF position and power supply is set to DC reverse polarity The power supply contactor should be set to Remote or Tig and the amperage control set to Panel or Standard depending on power supply Turn the Cobramatic Il power switch to the ON position and the Start switch to the OFF position Adjust power source to desired amperage for your weld condition Press gun trigger and adjust wire feed speed at gun to match current setting If approximate wire feed speed is not kn
24. OR REPRESENTA TION AS TO PERFORMANCE AND ANY REMEDY FOR BREACH OF CONTRACT WHICH BUT FOR THIS PROVISION MIGHT ARISE BY IMPLICATION OPERATION OF LAW CUSTOM OF TRADE OR COURSE OF DEALING INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR PARTICULAR PURPOSE WITH RESPECT TO ANY AND ALL EQUIPMENT FURNISHED BY MK PRODUCTS IS EXCLUDED AND DISCLAIMED BY MK PRODUCTS EXCEPT AS EXPRESSLY PROVIDED BY MK PRODUCTS IN WRITING MK PRODUCTS ARE INTENDED FOR ULTIMATE PURCHASE BY COMMERCIAL INDUSTRIAL USERS AND FOR OPERATION BY PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF WELDING EQUIPMENT AND NOT FOR CONSUMERS OR CONSUMER USE MK PRODUCTS WARRANTIES DO NOT EXTEND TO AND NO RE SELLER IS AUTHORIZED TO EXTEND MK PRODUCTS WARRANTIES TO ANY CONSUMER DATE March 1 2001 Cobramatic II Owner s Manual PRODUCTS MK Products Inc 16882 Armstrong Ave Irvine California 92606 http www mkproducts com Tel 949 863 1234 Fax 949 474 1428
25. ORPORATION Miami FL 305 592 5678 ELECTRICAL WELDERS SERVICE Orlando FL 407 999 5214 HAUN SYSTEMS REPAIR INC Orlando FL 407 681 6064 HOLOX Ocala FL 352 351 4417 J K CIRCUIT TECHNOLOGY Boynton Beach FL 561 733 7859 ROPER ELECTRIC MOTOR SERVICE Panama City FL 850 769 6643 SMITTY S WELDER SERVICE West Palm Beach FL 561 845 1224 TRI GAS Miami FL 305 592 3180 TRI STATE SALES amp LEASING Lake City FL 904 397 3340 TRI TECH Sarasota FL 941 758 3825 V A ELECTRICAL MOTORS CENTER Hialeah FL 305 825 3327 WELD DIRECT CORPORATION Jacksonville FL 904 387 5664 GEORGIA B amp W INDUSTRIAL SERVICES Augusta GA 706 738 8722 Mc CULLOUGH ELEC MOTOR SVC Atlanta GA 404 688 5251 HAWAII DC ELECTRIC INC Aiea HI 808 483 8900 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings IDAHO NORCO Boise ID 208 336 1643 ROSSITER ELECTRIC Idaho Falls ID 208 529 3665 ILLINOIS CMS ELECTROMECHANICAL SERVICES INC Galesburg IL 309 342 4125 888 964 3526 FRED ARMS ELECTRIC MOTOR REPAIR Stone Park IL 708 343 6262 INDUSTRIAL WELDER REBUILDERS Alsip IL 708 371 5688 RELIABLE EQUIPMENT REPAIR Hamel IL 618 633 5000 ROCKFORD INDUSTRIAL WELDING SUPPLY Rockford IL 815 226 1900 INDIANA AGA GAS INC Hammond IN 219 989 9030 AIRGAS MID A
26. PA 215 426 6650 J OSEPH PINTO J R EQUIPMENT CO E Lansdowne PA 610 259 4100 POWER SOURCE REPAIR CO INC Collingdale PA 610 532 6460 VALLEY NATIONAL GASES Pittsburgh PA 412 281 1835 SOUTH CAROLINA CAROLINA WELDER SERVICE Lake City SC 843 687 0413 TENNESSEE INDUSTRIAL MACHINE REPAIRS Rogersville TN 423 272 8199 NATIONAL RENTAL amp REPAIR Knoxville TN 423 584 6390 NEXAIR Memphis TN 901 523 6821 QUALITY WELD G EQUIPMENT Nashville TN 615 726 5282 TRAMCO Bristol TN 423 968 4499 TEXAS AIRGAS SOUTHWEST INC Austin TX 512 835 0202 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts com for most up to date listings AIRGAS SOUTHWEST INC Houston TX 713 462 8027 DENISON OXYGEN Denison TX 903 465 3369 FT WORTH WELDERS SUPPLY INC Fort Worth TX 817 332 8696 GPC SERVICES INC San Angelo TX 915 655 4545 LEKTROTECH INC Greenville TX 903 454 7146 RITE WELD SUPPLY INC Fort Worth TX 817 626 8237 TexAir WELDING SUPPLY Longview TX 903 238 9353 WELDING MACHINE amp TORCH REPAIR San Antonio TX 210 680 8390 UTAH ARC SERVICES LLC West Valley City UT 801 975 1121 C W SILVER INDUSTRIAL SERVICE Salt Lake City UT 801 531 8888 VERMONT W J WELDING EQUIPMENT REPAIR INC N Clarendon VT 802 775 7422 VIRGINIA AIR PRODUCTS amp CHEMICALS INC Bri
27. R S SAFETY PRACTICES SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS CONSUMIBLES QUE VA A UTILIZAR SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER STELLERS DIE UNFALLVERHUTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN Cobramatic II Owner s Manual Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zona Los humos fuera de la zona de res piraci n Mantenga la cabeza fuera de los humos Utilice ventilaci n o aspiraci n para gases Gardez la t te l cart des fum es Utilisez un ventilateur ou un aspira teur pour ter les fum es des zones de travail Vermeiden Sie das Einatmen von Schweibrauch Sorgen Sie f r gute Be und Entl ftung des Arbeitsplatzes Mantenha seu rosto da fumaga Use ventila o exhaust o para remover fumo da zona respirat ria eta Ab5omtNMT amp 45tuc CF uv emm e REHAB VAHAL Eyez 876 AAS AA 2 021714 ARAL duly CARY jaa denial e AA oux 21 os Turn p
28. Start lead is internally connected to the P C board on terminal strip J16 terminal 1 When using a Constant Current CC Power Source attach the No 14 single black lead which extends from the back of the Cobramatic II to the negative terminal of the welding power source or work ground Switch 3 must also be in the EXT position CABLE Connections Fic 3 Connect the positive power cable DCEP from the power supply to the bottom hole on the power block and secure with bolt Gas Hose Fic 3 Connect hose from regulator flowmeter to the fitting on the power block using a 5 8 18 IAA R H Gas fitting WATER Connections Fic 3 When using a water cooled torch connect the 5 8 18 L H male fitting extending from the torch lead assemblies to your water supply line The water return also uses a 5 8 18 L H male fitting and connects to the lefthand fitting on the power block Wire THREADING PROCEDURE Wire SPooL INSTALLATION Release latches and open right side door of cabinet Remove spool retainer from spindle hub Install wire spool onto spindle hub so that wire feeds from bottom of spool towards slave motor Make sure that the hole in the spool aligns with pin on spindle hub The white dot on the end of the spindle hub will aid in this alignment Replace the spool retainer Cobramatic Owner s Manual 2 THREADING PROCEDURE Place wire size selector switch on front panel to the correct p
29. above Do NOT depend on sense of smell or sight to determine if it is safe to weld or cut Hollow castings or containers must be vented before welding or cutting They can explode Explosive atmospheres NEVER weld or cut where the air may contain flammable dust gas or liquid vapors such as gasoline D Compressed Gas Equipment The safe handling of compressed gas equipment is detailed in numerous industry publications The following general rules cover many of the most common situations 1 Pressure Regulators Regulator relief valve is designed to protect only the regulator from over pressure it is not intended to protect any downstream equipment Provide such protection with one or more relief devices Never connect a regulator to a cylinder containing gas other than that for which the regulator was designed Remove faulty regulator from service immediately for repair first close cylinder valve The following symptoms indicate a faulty regulator Leaks if gas leaks externally Excessive Creep if delivery pressure continues to rise with downstream valve closed Faulty Gauge if gauge pointer does not move off stop pin when pressurized nor returns to stop pin after pressure release Repair Do NOT attempt repair Send faulty regulators for repair to manufac turer s designated repair center where special techniques and tools are used by trained personnel 2 Oylinders Cylinders must be handled c
30. al Page 17 CABINET AND Hook Up DIAGRAM 3 L Z Q 0 6 Work Ground Cable u 115VAC X Start Supply Cable Ground Cable N To water retum To gas supply ais f Water In Welding Torch Input Power Cable must be connected to bottom hole or Posa Start will not oper ate properly Upper hole is to be used only when con necting to the Prince spoolgun to the cabinet as a push pull system Cobramatic II Owner s Manual Page 18 FRONT PANEL 15 Layout FIGURE 4 6 Cobramatic II SPOT TIMER amp OPTIONAL VOLTAPM METER KIT P N 005 0190 WIRE TYPE 4 035 ALUM ONLY 8 ALL OTHER WIRES POSASTART 426 WIRE SPEED Cobramatic Owner s Manual Page 19 Main Board SwitcH SETTINGS AND REMOTE CONNECTIONS Ficure 5 VOLT SENSE N SELECTIONS WIRE SPEED SELECTIONS 2 TORCH 2 2 7 F a a 9 74 FORO 0 POSA START 6 SPEE0 T 422 Analog Signal Connector Pin Outs 2 Circuit ground 22 1 Trigger cycle start Contact Closure ref to 22 1 22 2 Wire speed command input 4 1V 2100 ipm J 22 3 0 10VDC 50ma to ref to 22 1 Arc established output 10VDC with ref to 22 4 J 22 1 during arc 10K ohm source impedance Torch potentiometer ref voltage J 22 5 100 ipm 0 10VDC output ref to 22 1 Gas purge Input C
31. al welding will start If the trigger is released during pre purge no weld will be initiated Posr PuncE The larger knob on the pre post purge control may be turned clockwise to increase the post purge interval This control cannot be turned off and provides approximately 07 to 4 5 seconds of post flow The post purge will not activate unless an arc has been established BunN Back The larger knob on the spot time Burn back control may be turned clockwise to increase the burn back interval During this interval all functions except wire feed are maintained and thus the arc burns the wire back towards the tip Excessive burn back may result in damage to the contact tip The burn back control must be clicked on and is adjustable from 015 to 085 seconds The burn back control is not activated until an arc has been established Spot TIME The spot timer has the capability to time and terminate a weld cycle following a trigger ON command The spot time function is initiated once the arc is Cobramatic Owner s Manual 5 established and even if the trigger is held ON or released the cycle will end at the spot timer time out To initiate a new cycle the trigger must be turned OFF released and re triggered The spot time knob must be clicked ON and the duration may be set from 07 to 3 seconds The spot time may be used with all other functions pre purge burn back post purge NOTE Even with the spot tim
32. alve in following position for oxygen and inert gases open fully to seal stem against possible leak for fuel gas open to less than one turn to permit quick emergency shut off Use pressure charts available from your supplier for safe and efficient recommended pressure settings on regulators Check for leaks on first pressurization and regularly thereafter Brush with soap solution Bubbles indicate leaks Clean off soapy water after test dried soap is combustible E User Responsibilities Follow all Safety Rules Remove leaky or defective equipment from service immediately for repair Read and follow user manual instructions F Leaving Equipment Unattended Close gas supply at source and drain gas G Rope Staging Support Rope staging support should not be used for welding or cutting operation rope may burn 1 3 ARC WELDING Comply with precautions in 1 1 1 2 and this section Arc Welding properly done is a safe process but a careless operator invites trouble The equipment carries high currents at significant voltages The arc is very bright and hot Sparks fly fumes rise ultraviolet and infrared energy radiates weldments are hot and compressed gases may be used The wise operator avoids unnecessary risks and protects himself and others from accidents A Burn Protection Comply with precautions in 1 2 The welding arc is intense and visibly bright Its radiation can damage eyes penetrate lig
33. arefully to prevent leaks and damage to their walls valves or safety devices Avoid electrical circuit contact with cylinders including third rails electrical wires or welding circuits They can produced short circuit arcs that may lead to a serious accident See 1 3C ICC or DOT marking must be on each cylinder It is an assurance of safety when the cylinder is properly handled Identifying gas content Use only cylin ders with name of gas marked on them do not rely on color to identify gas content Notify supplier if unmarked NEVER DEFACE or alter name number or other markings on a cylinder It is illegal and hazardous Empties Keep valves closed replace caps securely mark MT keep them separate from FULLS and return promptly Prohibited use Never use a cylinder or its contents for other than its intended use NEVER as a support or roller Locate or secure cylinders so they cannot be knocked over Passageways and work areas Keep cylin ders clear of areas where they may be stuck Transporting cylinders With a crane use a secure support such as a platform or cradle Do NOT lift cylinders off the ground by their valves or caps or by chains slings or magnets Do NOT expose cylinders to excessive heat sparks slag and flame etc that may cause rupture Do not allow contents to exceed 55 degrees C 130 degrees F Cool with water spray where such exposure exists Protect cylinders particularly
34. bramatic II comes from the factory already calibrated for the torches indicated on the torch selector switch S2 but further fine tuning can be done to the motor drive circuit by using trim pots R54 and R69 This adjustment may be necessary due to variations in different torch motor gearboxes type of drive rolls used age of torch and many other contributing factors Each time you use a different torch on the cabinet you may want to re check this calibration While this adjustment is not critical for most Cobramatic Owner s Manual Page 8 SECTION C applications it is important when using a meter kit on the Cobramatic cabinet to make sure the demand and actual wire speeds are the same It is equally important to maintain proper calibration when using a remote 0 10VDO input to control wire speed as this will expect certain results for each demand of input voltage The goal of this calibration procedure is to have 1 volt of input to equal 100 ipm at the torch 2 volts equals 200 ipm etc 1 Insure that switch 2 S2 is in the correct position for the torch you are using Insure that switch 1 S1 is in the correct position for your control requirements torch pot cabinet pot or remote Set the pre purge control to off if so equipped Turn Posa Start off Adjust the command voltage TP11 to 2 00 VDC using the torch pot cabinet pot or remote command depending on the position of S1 Use J22 1 for ground re
35. ce negative on TP3 and positive on TP2 should have 14 3 to 15 7VDC at all times TRIGGER SIGNAL Place negative lead on TP3 and positive on TP8 should be high press trigger should go low Wire Forward SIGNAL Place negative on TP3 and positive on TP9 should be high press trigger should go low Torch Motor VoLTAGE Place negative on TP3 and positive on TP10 Press torch trigger and change wire feed speed potentiometer should vary from 0 27VDC Circuit Place negative on and positive on should be high press trigger should go low Units with Timer Kit Installed J9 Follow above steps except note the following changes Turn unit OFF and plug in the J9 connector Trigger signal high may only be 7VDC Inhibit circuit should be low at all times Cobramatic Owner s Manual Page 12 TROUBLESHOOTING GUIDE F3 2 amp fuse in feeder blown Check 115 VAC circuit Replace fuse No wire feed at torch feeder Micro switch defective not being Replace switch Check switch for not operating i e no slave motor or activated Broken electrical cable operation Check micro switch wires for brake solenoid continuity Loose J 13 PC board connector Check J 13 connector Brake Solenoid inoperative i p Main PC board defective Check for D31 LED operation replace board Switch 1 on Main PC board in wrong Select cabinet torch or remote position position Bad Speed control PCB Check r
36. d not be welded on or cut Walls ceilings and floor near work should be protected by heat resistant covers or shields Fire watcher must be standing by with suitable fire extinguishing equipment during and for some time after welding or cutting if 1 Appreciable combustibles including building construction are within 35 feet 2 Appreciable combustibles are further than 35 feet but can be ignited by sparks 3 Openings concealed or visible in floors or walls within 35 feet may expose combustibles to sparks 4 Combustibles adjacent to walls ceil ings roofs or metal partitions can be ignited by radiant or conducted heat Hot work permit should be obtained before operation to ensure supervisor s approval that adequate precautions have been taken After work is done check that area is free of sparks glowing embers and flames An empty container that held combus tibles or that can produce flammable or toxic vapors when heated must never be welded on or cut unless container has first been cleaned in accordance with industry standards This includes a thorough steam or caustic cleaning or a solvent of water washing depending the combustible s solubility followed by purging and inert ing with nitrogen or carbon dioxide and using protective equipment Water filling just below working level may substitute for inerting A container with unknown contents should be cleaned see paragraph
37. d voltage is present no wire feed will occur ToncH ELEcTRICAL RECEPTACLE The Cobramatic II has a 7 pin W clocked Amphenol connector to provide an electrical connecting point to the torch See specifications for more information CABINET Wire FEED SPEED POTENTIOMETER Optionat P N 005 0166 By selecting the cabinet potentiometer the wire feed speed may be adjusted from the cabinet See wire speed source section 9 4 The counter dial directly reads in inches per minute 0 to 1000 IPM Power CABLE INLET The Power Inlet provides access to the power block fitting inside the cabinet INLET The Conduit Inlet provides access to the slave motor outlet guide SHIELDING Gas INLET Provides access to the gas fitting inside the cabinet ConTROLS FOR OPTIONAL Kit P N 005 0196 Water INLET Provides access to make the gun water connection to recirculator hose Gas PuncE The Gas Purge button operates the gas solenoid in the cabinet When the solenoid in the cabinet is used a modified gas valve P N 431 1080 must be installed in the torch The smaller knob on the pre post purge control may be turned clockwise to increase the pre purge interval The control cannot be turned off and provide a range of approximately 07 to 3 4 seconds When the trigger is depressed the gas solenoid will open and all other functions will be inhibited until the end of the pre purge interval when norm
38. ductive harm Adequate ventilation Severe discomfort illness or death can result from fumes vapors heat or oxygen enrichment or depletion that welding or cutting may produce Prevent them with adequate ventilation NEVER ventilate with oxygen Lead cadmium zinc mercury beryl lium bearing and similar materials when welded or cut may produce harmful con centrations of toxic fumes Adequate local exhaust ventilation must be used or each person in the area as well as the operator must wear an air supplied respirator For beryllium both must be used Metals coated with or containing materials that emit toxic fumes should not be heated unless coating is removed form the work surface the area is well ventilated or the operator wears an air supplied respirator Work in a confined space only while it is being ventilated and if necessary while wearing an air supplied respirator Gas leaks in a confined space should be avoided Leaked gas in large quantities can change oxygen concentration dangerously Do not bring gas cylinders into a confined space Leaving confined space shut OFF gas supply at source to prevent possible accu mulation of gases in the space if down stream valves have been accidentally opened or left open Check to be sure that the space is safe before reentering it Vapors from chlorinated solvents can be decomposed by the heat of the arc or flame to form PHOSGENE a highly toxic gas a
39. e 3 Cabinet and Torch Hook Up Diagram Figure 4 Front Panel Controls Layout Figure 5 Main Board Switch Settings and Remote Connections 001 3070 Cobramatic Il Assembly 003 1701 Front Panel Assembly 003 1674 Power Block Assembly 003 2078 Slave Motor Assembly 003 0570 Spindle Brake Assembly 071 0252 Multi Function Timer Board 071 0296 Front Panel 071 0330 Meter 071 0365 Main Board 071 0366 Wiring Diagram Cobramatic Owner s Manual 15 Hook Up SELECTION 1 CLOSING CONTACTOR WIRE POSITION As Shipped From Factory MACK NEUTRAL MEUTRAL HOT CONTACTOR am z ASSY 0C7 1977 120VAC CONTACTOR WIRE POSITION WHITE WIRE BLACK WIRE NOTE BOTH TYPES OF CONTACTOR OUTPUTS ARE AVAILABLE SIMULTANEOUSLY THERE IS NO SWITCH TO SELECT BETWEEN THE DIFFERENT TYPES YOU MUST MOVE THE CONTACTOR LEADS BETWEEN TERMINAL STRIPS J15 AND J16 Cobramatic II Owner s Manual Page 16 Power Posa START CONNECTIONS FIGURE 2 DEPTS a S3 asss Wi wii SPEED POSA START VOLT SENSE X 2 8E E Lr S3 see text for correct position POSA START WORK GROUND CONNECTION BLACK WIRE 555 2 TEET T gt INPUT POWER wate NEUTRAL BLACK MU F CONTACTOR WIRE POSITION 1 2 4 WHITE WIRE 7 NO 003 197 BLACK WIRE m GREEN WIRE 5 gt T T Cobramatic Il Owner s Manu
40. eck ground for continuity Be sure conductors are touching bare metal Cobramatic II Owner s Manual of equipment frames at connections If a line cord with a ground lead is provided with the equipment for connec tion to a switch box connect the ground lead to the grounded switch box If a three prong plug is added for connection to a grounded mating receptacle the ground lead must be connected to the ground prong only If the line cord comes with a three prong plug connect to a grounded mating receptacle Never remove the ground prong from a plug or use a plug with a broken ground prong 2 Connectors Fully insulated lock type connectors should be used to join welding cable lengths 3 Cables Frequently inspect cables for wear cracks and damage IMMEDIATELY REPLACE those with excessively worn or damaged insulation to avoid possibly lethal shock from bared cable Cables with damaged areas may be taped to give resistance equivalent to original cable Keep cable dry free of oil and grease and protected from hot metal and sparks 4 Terminals and Other Exposed Parts Terminals and other exposed parts of electrical units should have insulating covers secured before operation 5 Electrode Wire Electrode wire becomes electrically HOT when the power switch of gas metal arc welding equipment is ON and welding gun trigger is pressed Keep hands and body clear of wire and other HOT parts 6 Safety Devices Safety
41. eplace Main PC board No wire feed at torch feeder operating Check motor and potentiometer wires properly Broken electrical cable for continuity Bad torch motor D39 LED ON mire WT IS RON Contactor control cable loose or in Ghee e power supply ownersma nual for energized location and type of contactor signal wrong position required 1 closing or 115VAC Welding power source Check power source for operation Decrease spool drag pressure inside Excessive spool drag pressure hub Dirty or worn conduit Blow out or replace conduit Adjust pressure at both feeder and torch Check for lock washer under idler roll Idler roll stuck or replace if damaged Wrong size contact tip See contact tip table in torch manual Bad potentiometer Check with meter Wire feeds one speed only Broken electrical cable Check potentiometer wires for continuity or short Bad speed control Check replace Main PC board Idler roll upside down Place groove in idler roll toward top Wire walks out of drive rolls s Rear wire guide missing Replace wire guide Wire feeds erratically Incorrect pressure on drive rolls Cobramatic II Owner s Manual Page 13 This page left intentionally blank Cobramatic Owner s Manual Page 14 SECTION F APPENDICES DIAGRAMS AND Parts Lists Figure 1 Contactor Hook up Selection Figure 2 Input Power and Posa Start Connections Figur
42. er Kit 005 0190 Displays both wire feed speed and weld voltage Preset Adjusting Screw Kit 005 0125 Water Flow Kit Wire Guard Kit 005 0618 standard on all wire feeders Cobramatic II Owner s Manual Page 9 Section D MAINTENANCE RouriNE MAINTENANCE Maintenance of the torch will normally consist of a general cleaning of the wire guide system including tubes drive rolls and conduits at regular intervals Remove spatter build up from inside of nozzles with a hardwood stick The only parts on the Cobramatic system that are subject to normal wear are the conduit contact tips gas cups front body liners wire guides drive and idler rolls A supply of these parts should be maintained on hand If repairs do become necessary any part can easily be replaced by qualified shop maintenance personnel Your Cobramatic is designed to provide years of reliable service Normal wear and component failure may require occasional service The number of units in operation and the importance of minimal down time will determine to what extent spare parts should be stocked on hand The following list comprises the most commonly replaced parts RECOMMENDED SPARE PARTS QTY DESCRIPTION P N 1 Brake Solenoid w leads 003 2096 1 Main P C Board 003 1977 Main P C Board exchange 006 1977 1 Front Panel P C Board 003 1688 Front Panel P C Board exchange 006 1688 1 Slave Motor Drive Roll 511 0206 1 Slave Motor Idler Roll
43. er turned ON the wire will not time out until you strike an arc This provides very accurate repetitive timing ConTROLS FOR Optional Meter Kit P N 005 0190 The LED meter provides a continuous reading of wire feed speed in inches per minute When the trigger is energized the meter will display weld voltage Posa START OPERATING PROCEDURE GENERAL DESCRIPTION The Start feature allows the Cobramatic II to be used in combination with constant current DC welding power sources of open circuit voltage in excess of 55 volts also any constant voltage welding power source capable of a minimum of 50 amps NOTE Reverse polarity MUST be used The Posa Start MUST be used with a Constant Current power source to provide arc initiation and may be used with a Constant Voltage power supply to help eliminate burn backs at arc start CAUTION DO NOT OPERATE Cobramatic II ON A POWER SOURCE HAVING HIGH FREQUENCY STARTING CIRCUIT BEFORE MAKING SURE THAT THE HIGH FREQUENCY PORTION OF THE POWER SOURCE IS TURNED OFF FAILURE TO TAKE THIS PRECAUTION WILL CAUSE PERMANENT DAMAGE TO THE POSA START CIRCUITRY The Posa Start Run in Speed Control located on the front panel provides adjustment for slow wire run in Once the arc has been established the wire feed speed is automatically changed from the slow run in speed to the welding speed The Posa Start does not control the wire speed while welding CV Posa Start
44. erent for export and turn cabinet ON Remove torch wire conduit from the outlet guide on the slave motor assembly Cut a piece of 045 hard wire 10 long and make a small loop on one end to attach the spring scale Place the wire size selector switch on the front panel in the 030 amp 035 ALUMINUM ONLY position Insert the 045 hard wire into slave motor assembly press trigger and tighten slave motor drive roll pressure adjusting nut until the drive roll stalls The spring scale should read about 1 1 2 55 of pull when the slave motor stalls Now repeat the test with the wire selector switch set to the ALL OTHER WIRES position Depress the torch trigger and readjust the drive roll pressure adjusting nut until the drive stalls once again This time the spring scale should read approximately 4 1 2 16 TROUBLESHOOTING Main BoARD MAIN BOARD Test Points High 9 to 10 volts Low 1 volt or less A voltmeter is required for the following test TP3 is ground Turn the unit OFF and unplug the J9 connector going to the timer board if so equipped from the main board Turn unit ON and set meter to DC Cobramatic II Owner s Manual 11 27VAC Input Set voltmeter to AC Place negative on TP1 and positive on TP4 should have 27 to 30VAC at all times 10V 5 Place negative lead on TP3 and positive on TP5 Should have 10VDC with trigger ON or OFF 15V 5 Pla
45. essy 90 8 03141934 3SIMN3HIO SSIINN 5310 495 311201 3SN E 6200 c28 N d XOIWON ISN 2 Cobramatic II Owner s Manual 24 gt 9313201 wv 833201 evooeze uv erts at TE OG X SZT 1 suos ot 1030W DION JO p WY zecouer T X 8 S qO buuds s see X t L X t T APIUS 425 s IS 8 T T X ZE 8 DUS 25 esos v a Tau ses al 52740746 20 0 ASTT quuessy 10100 S Cobramatic Owner s Manual Page 25 10 40 00 Assy e eug c 1X8 X8 18 1 5 0060 1585 Jeurejeg joods 6910 1857 01 95 INN 8100 St 91 6 J9uSeM OOLO LEE 9 9 0820 61 0810 57 POW 8 9 X 7 1 195 JepinousS 905 0 8 1814 USEM 900 LEE Buuds suoisseJdui025 6600 61 dnoioeg 99z1 Let e pis N eipurds 90 6 Assy Buue g 690 500 ON Hed 10240 500
46. ference Feed out wire for exactly six 6 seconds and measure You should have 20 inches of wire for a 2 volt command Repeat and compare the two segments of wire for an average length If wire length is less than 20 inches 200 IPM increase clock wise R54 and repeat step 5 If wire length is is greater than 20 inches 200 IPM decrease counter clock wise R54 and repeat step 5 R54 adjustment is approximately 0 5 inches turn 5 IPM turn Adjust the command voltage TP11 to 6 00 VDC using the torch pot cabinet pot or remote command depending on the position of S1 Feed out wire exactly exactly six 6 seconds and measure You should have 60 inches of wire for a 6 volt command Repeat and compare the two segments of wire for an average length If wire length is less than 60 inches 600 IPM increase clockwise R69 and repeat step 5 If wire length is greater than 60 inches 600 IPM decrease counter clockwise R69 and repeat step 8 R69 adjustment is approximately 1 0 inch turn 10 IPM turn Repeat steps 4 through 9 until the wire speed IPM matches the demand voltage VDC ACCESSORIES Plastic Guides for Slave Motor Inlet Guide 753 0062 Outlet Guide with Knob 003 0428 Cabinet Potentiometer Kit 005 0166 Removes wire feed speed control from the torch to the cabinet and provides a 10 turn counter dial Timer Kit 005 0196 Provides pre purge post purge Burn back and spot time Met
47. have preset adjusting nuts which enables spools of the same wire diameter and type to be changed without further pressure adjustment after initial set up To preset the slave motor tension bottom out the pressure adjusting knob by turning it completely clockwise Prevent the wire spool from turning and using a 9 16 wrench adjust the preset nut until the slave motor stalls then add an additional 1 4 turn Correct pressure will now be achieved by simply bottoming out the pressure adjusting knob Wire Guard The Cobramatic Wire Guard P N 005 0618 is designed to keep the welding wire from jumping off the spool inside the wire feed cabinet When the trigger is released and the brake engages especially when using a new spool that is heavier towards the outside the spool will tend to rotate more against the spindle drag adjustment However since the wire is held by the slave motor it will not move and could subsequently jump off the back of the spool and become lodged in the brake mechanism or jump off the front of the spool and electrically short out to the cabinet chassis The wire guard will keep the wire from doing either The wire guard is designed to run inside the spool on top of the wire and when the brake is engaged the wire guard will hold the wire onto the spool The wire guard is made of a heavy woven nylon material that is resistant to Cobramatic Owner s Manual Page 3 SEcTION wear and will not contam
48. htweight clothing reflect from light colored surfaces and burn the skin and eyes Skin burns resemble acute sunburn those from gas shielded arcs are more severe and painful DON T GET BURNED COMPLY WITH PRE CAUTIONS 1 Protective Clothing Wear long sleeve clothing in addition to gloves hat and shoes As necessary use additional protective clothing such as leather jacket or sleeves flameproof apron and fire resistant leggings Avoid outer garments of untreated cotton Bare skin protection Wear dark sub stantial clothing Button collar to protect chest and neck and button pockets to prevent entry of sparks 2 Eye and Head Protection Protect eyes from exposure to arc Eyes may be damaged by radiant energy when exposed to the electric arc even when not looking in the direction of the arc Never look at an electric arc without protection Welding helmet or shield containing a filter plate shade no 12 or denser must be used when welding Place over face before striking arc Protect filter plate with a clear cover plate Cracked or broken helmet or shield should NOT be worn radiation can be passed through to cause burns Cracked broken or loose filter plates must be replaced IMMEDIATELY Replace clear cover plate when broken pitted or spattered Flash goggles with side shields MUST be worn under the helmet to give some protection to the eyes should the helmet not be lowered over the face before an arc
49. inate the surface of the wire TorcH Drive USTMENT IMPORTANT NOTE Over tightening of the drive rolls will cause excessive knurling and or deformation of the wire When the complete system is set up properly feeding wire out of the end of the torch and letting fall on the ground should form a large uniform circle If it forms a spiral or spring then there is too much tension in the system please refer to the Cabinet Owners Manual for adjustment to the tension setting detailed there THIS IS THE NUMBER ONE CAUSE OF POOR WIRE FEED PERFORMANCE OPERATION GENERAL DESCRIPTION Cobramatic is an analog input version of the popular Cobramatic Cabinet and operates on the same basic principles The AC slave motor in the feeder runs at a fast constant speed but has very low torque It is always trying to feed more wire than the torch motor wants and when the motor gets all it wants it slows the slave motor preventing a bird s nest Because of the low torque produced by the slave motor a brake system is used to prevent wire overrun rather than tension The drag adjustment in the spindle is used to keep the wire slightly taut so it will not unspool while feeding wire The high torque 24 VDC torch pull motor is controlled by a solid state speed control and a potentiometer located in the torch feeder or remotely The solid state control circuit provides a wide range of operating conditions and includes perfo
50. ir or replacement at our Irvine California plant or 4 payment of or credit for the purchase price less reasonable depreciation based upon actual use upon return of the goods at customer s risk and expense Upon receipt of notice of apparent defect or failure MK Products shall instruct the claimant on the warranty claim procedures to be followed As a matter of general policy only MK Products may honor an original user s warranty claims on warranted equipment in the event of failure resulting from a defect within the following periods from the date of delivery of equipment to the original user MK Products Inc 16882 Armstrong Ave Irvine CA 92606 Tel 949 863 1234 Fax 949 474 1428 Classification of any item into the foregoing categories shall be atthe sole discretion of MK Products Notification of any failure must be made in writing within 30 days of such failure Acopy of the invoice showing the date of sale must accompany products returned for warranty repair or replacement All equipment returned to MK Products for service must be properly packaged to guard against damage from shipping MK Products will not be responsible for any damages resulting from shipping Normal surface transportation charges both ways for products returned for warranty repair or replacement will be borne by MK Products except for products sold to foreign markets ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY GUARANTY
51. l et de la terre Ber hren Sie keine stromf hrenden Teile oder Elektroden mit Ihrem K rper oder feuchter Kleidung isolieren Sie sich von den Elektroden und dem Erdboden N o toque partes el tricas e elec trodos com pele ou roupa molha da Isole se da pega e terra S NATUSMELTFSU e REGUM E NSS E su etti Be RASRTAH NE SUSE HE ONU zt uu ne 9515 SA nidis AMI qoas YI 519 IO sal MA dang d Jo Keep flammable materials away Mantenga el material combustible fuera del rea de trabajo Gardez l cart de tout mat riel inflammable Entfernen Sie brennbarres Material Mantenha inflam veis bem guarda dos emaviv 600MCORBSTER GiHICUC USEUSEA EM 5134 gag x ng JAM TYLA e Wear eye ear and body protection Prot jase los ojos los o dos y ei tuerpo Prot gez vos yeux vos oreilles et votre corps Tragen Sie Augen Ohren und K r perschutz Use prote o para a vista ouvido e corpo FRUSBCREREL TE 24 AY go 5837 rura 4p Al y ace e READ AND UNDERSTAND THE MANUFACTURER S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE USED AND FOLLOW YOUR EMPLOYE
52. nd other lung and eye irritating prod ucts The ultraviolet radiant energy of the arc can also decompose trichloroethylene and perchloroethylene vapors to form phosgene DO NOT WELD or cut where solvent vapors can be drawn into the welding or cutting atmosphere or where the radiant energy can penetrate to atmo spheres containing even minute amounts of trichloroethylene or perchloroethylene C Fire and Explosion Prevention Causes of fire and explosion are com Cobramatic II Owner s Manual bustibles reached by the arc flame flying sparks hot slag or heated mate rial misuse of compressed gases and cylinders and short circuits BE AWARE THAT flying sparks or falling slag can pass through cracks along pipes through windows or doors and through wall or floor openings out of sight of the goggled operator Sparks can fly many feet To prevent fires and explosion Keep equipment clean and operable free of oil grease and in electrical parts of metallic particles that can cause short circuits If combustibles are in area do NOT weld or cut Move the work if practicable to an area free of combustibles Avoid paint spray rooms dip tanks storage areas ventilators If the work cannot be moved move combustibles at least 35 feet away out of reach of sparks and heat or protect against ignition with suitable and snug fitting fire resistant covers or shields Walls touching combustibles on opposite sides shoul
53. ontact closure to 22 1 J 22 6 Wire forward Input Contact closure to 22 1 J 22 7 J16 Signal Connector Pin Outs Weld ground Input J 16 1 Closing Contactor Output trigger J 16 2 Closing Contactor Output trigger J 16 3 Closing Contact Output ArcEst J 16 4 Closing Conatct Output Arc Est J 16 5 Cobramatic II Owner s Manual Page 20 32 413 32 116 1 ITEM 32 115 1 TEM TEM 50 TEM 51 AND ITEM 59 32 J4 32 15 32 Ji 32 J2 32 JS 31 003 0801 33 E NOT SHOWN FOR CLARITY 11 ITEM ITEM ITEM TEM ITEM WHITE TO 32 J16 2 BLACK TO ITEM f IRVINE CALIFORNIA COBRAMATIC ASSY 115 VOLTS o E T EL NOTES UNLESS OTHERWISE SPECIFIED 119159904 00 E M K PRODUCTS INC 4 FOR ITEM 2 FOR ITEM 7 FOR ITEM OPTIONAL o gt a lt o N 6 FOR ITEM 2 8 FOR ITEM 41 1 FOR GROUND 2 FOR ITEM 26 E FOR ITEM 27 FOR GROUND OPTIONAL Cobramatic II Owner s Manual Page 21 40 133 5 3NON 31 26 SJL ASSY ll 2 VWV3gOo 151 Sluvd ONI NE UU SNOlLdIB2S3Q SH3HWnN d 3NOZ d 9f 1913 2000 15 20 2 ez ISN SiMvd ze 9 413 INN 8000 65 22 2 o SNOILdIN2S30 Su38WnN d 3NOZ d GCNNOI1dO 11 VHBOO LIM 824 M3WIL 9610 600 10 2 i 93433455 13NIBVO 3SVH S 00 9 v 93 ASSY
54. ore wire than the torch motor wants and when the motor gets all it wants it slows the slave motor preventing a bird s nest Because of the low torque produced by the slave motor a brake system is used to prevent wire overrun rather than tension The drag adjustment in the spindle is used simply to keep the wire slightly taut so it will not pull off the spool while feeding wire The 24VDC torch motor is controlled by a solid state speed control and a pot located in the torch cabinet or remotely The torch motor potentiometer and micro switch are connected to the cabinet via a control cable and amphenol If this cable becomes damaged a variety of symptoms can occur depending on which wire s break To test check each wire for continuity and shorts Remember the micro switch in the torch activates both the 115VAC and 24V circuits in the cabinet Therefore if the slave motor and brake solenoid operate but the torch does not look more toward the 24V circuits speed control control cable or the torch motor If nothing operates look more toward the 115VAC input micro switch leads or micro switch The objective of this trouble shooting section is to identify and replace faulty assemblies not individual component repairs Stave Motor TENSION TEST To check for proper operation of the slave motor the following test may be performed Disconnect welding power from Cobramatic Il cabinet Plug Cabinet into 115VAC power outlet diff
55. osition for the wire being used NOTE For 3 64 and 1 16 aluminum wire use the ALL OTHER WIRES position Loosen end of wire from spool and cut off any kinked or bent portions Unreel and straighten out first 6 to 8 of wire Release tension from slave motor drive rolls Route wire into inlet guide along drive roll groove and into wire conduit Prevent the wire spool from turning with the palm of the right hand and at the same time grasp the slave motor pressure adjusting knob Pull the torch trigger and slowly tighten the slave motor pressure adjusting knob until the slave motor stalls then add an additional 1 4 turn more CAUTION EXCESSIVE DRIVE ROLL TENSION WILL REDUCE RATHER THAN IMPROVE WIRE FEED PERFORMANCE Tighten the torch pressure adjusting knob so the wire will be picked up and fed through the contact tip Proper tension is achieved when wire does not slip if a small amount of pressure is added to the wire as it exits the tip SPINDLE DRAG USTMENT Loosen nut inside spindle until spring is not compressed When in the 030 035 Aluminum Only position tighten nut until you feel spring start to compress then add 1 turn Press the trigger and make sure the wire comes level off of the spool If you can see the wire cast when feeding add a little more drag 1 4 turn When in the All Other Wires position start with 3 turns of drag and adjust Pre SetTING SLAVE Motor TENSION All Cobramatic s
56. ources of ignition Wipe with a clean lintless cloth Cobramatic II Owner s Manual Match regulator to cylinder Before connecting check that the regulator label and cylinder marking agree and that the regulator inlet and cylinder outlet match NEVER Connect a regulator designed for a particular gas or gases to a cylinder containing any other gas Tighten connections When assembling threaded connections clean and smooth seats where necessary Tighten If connection leaks disassemble clean and retighten using properly fitting wrench Adapters Use a CGA adapter available from your supplier between cylinder and regulator if one is required Use two wrenches to tighten adapter marked RIGHT and LEFT HAND threads Regulator outlet or hose connections may be identified by right hand threads for oxygen and left hand threads with grooved hex on nut or shank for fuel gas 5 Pressurizing Steps Drain regulator of residual gas through suitable vent before opening cylinder or manifold valve by turning adjusting screw in clockwise Draining prevents excessive compression heat at high pressure seat by allowing seat to open on pressurization Leave adjusting screw engaged slightly on single stage regulators Stand to side of regulator while opening cylinder valve Open cylinder valve slowly so that regula tor pressure increases slowly When gauge is pressurized gauge reaches regulator maximum leave cylinder v
57. ower off before servicing Desconectar el cable de ali mentaci n de poder de la m quina antes de iniciar cualquier servicio 9 D branchez le courant avant l entre tien 9 Strom vor Wartungsarbeiten abschalten Netzstrom v llig ff nen Maschine anhalten No opere com as tampas removidas Desligue a corrente antes de fazer servi o e toque as partes el tricas nuas e EZKER PERK STRRAL FE SFT e Bod Hug ui olii e Do not operate with panel open or guards off No operar con panel abierto o guardas quitadas N op rez pas avec les panneaux ouverts ou avec les dispositifs de protection enlev s Anlage nie ohne Schutzgehause oder Innenschutzverkleidung in Betrieb setzen Mantenha se afastado das partes moventes opere com os paineis abertos ou guardas removidas Ri U ORNKTMRAARS E gol gel dus HEA HAS 4051 Glatt a gl Spanish AVISO DE PRECAUCION French ATTENTION German WARNUNG Portuguese LEIA E COMPREENDA AS INSTRU ES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO SIGA AS PRATICAS DE SEGURANCA DO EMPREGADOR 2 CUCRIEOS EI CF SU OE FE AED EHE DEOS DEOR 1
58. own it is better to start with excess wire feed rather than too little in order to prevent possible damage to the contact tip Turn Start switch to the position Press torch trigger and using Run in Speed Control adjust wire feed speed to approximately 10 of the welding wire speed Strike an arc if the wire stubs out reduce wire feed rate at gun or increase amperage setting on power source NOTE Because the Posa Start Run in Speed always remains a percentage of the actual welding wire feed rate the Posa Start run in speed will always slow down or speed up proportional to any adjustment you now make at the gun Therefore if you slow down the welding wire feed speed you will have to increase the Run in Speed setting Wire SPEED Source S1 FIGURE 5 The wire feed command may be obtained from the torch cabinet or from a 0 10VDC analog signal by simply changing switch 1 S1 settings 1 a four position dip switch is located in the upper left hand corner of the Main PC Board and set as follows NOTE Only one switch may be ON at a time SwircH 1 SErriNGs S1 FIGURE 5 WIRE SPEED t Position 1 connection NC 2 Selects cabinet potentiometer opt 3 Selects torch potentiometer i i 4 Selects a remote 0 10VDC gt analog signal command through 5 m a 5K ohm potentiometer m 8 422 4 Ground S 5 J22 3 Wiper e TP5 10VDC or external source
59. rmance and fault isolation L E D indicators The wire feed speed command can be derived from the cabinet torch or from a 0 10 volt analog external signal A variety of input output signals make it highly suitable for automatic applications CONTROLS AND SETTINGS SEE ric 4 SwrrcH Placing the switch in the ON position energizes the feeder circuitry and the power indicator light Wire Size SELECTOR SWITCH The wire size selector switch changes the torque of the slave motor for the wire you are using When in the 030 035 Aluminum Only Position the slave motor produces approximately 1 1 2 lbs inches and approximately 4 1 2 lbs inches when in the All Other Wires Position NOTE Operating the cabinet with the switch in the wrong position will cause wire feed difficulties Posa Start CONTROL When in the ON position the wire feed command is derived from the Posa Start potentiometer After arc initiation the wire feed speed is controlled by the selected wire feed source i e torch cabinet or remotely Wire INCH The Wire Inch button causes wire feed at the weld feed rate from the selected source independent of Posa Start and may be used to observe or time Cobramatic Owner s Manual Page 4 the weld wire feed rate without turning Start off The contactor is not activated during Wire Inch NOTE If the wire feed speed is set to accept a remote source and no input comman
60. sibility to input power 42 110VAC 50 60 Hz must also be considered when installing the cabinet SELECTION Fic 1 The Cobramatic Il is shipped from the factory in the closing contacts position A six foot 6 contactor cable is supplied with the unit to which the black and white wires supply the contactor signal If a 115 VAC contactor out signal is required remove the screws from the left Cobramatic Owner s Manual 1 side of the cabinet and open door Locate the black and white wire 2 and 3 of terminal strip J16 Move black wire to 4 and white wire to 3 of terminal strip J15 The unit will now supply 115 VAC on the black hot and white neutral wires NOTE Refer to the power supply owner s manual for location and type of contactor signal required WARNING Disconnect the Cobramatic Cabinet from all power sources before changing contactor INPuT CONNECTIONS Power Connections Fic 2 Connect the supplied 6 three 3 prong plug to a 115 VAC 50 60 Hz outlet For 42VAC export cabinets no input power cord is provided The input power cord is connected to the PC Board on terminal strip J15 1 neutral and 2 hot and Ground to the cabinet chassis Posa Start Connections Fic 2 When using a Constant Voltage CV Power source such as the MK2000A the Posa Start lead need not be connected and switch 3 should be placed in the INT position The Posa
61. stol VA 540 669 3161 ARC WELDERS INC Ashland VA 804 798 1818 ARCET EQUIPMENT CO Hampton VA 757 728 9353 N W MARTIN CO Springfield VA 703 644 0120 NORFOLK WELDERS SUPPLY Norfolk VA 804 622 6571 WASHINGTON AIRGAS NORPAC INC Tacoma WA 253 473 2282 AIRGAS NORPAC INC Vancouver WA 360 574 5311 A L WELDING PRODUCTS Tukwila WA 425 228 2218 AMERICAN EQUIPMENT SERVICES Kent WA 253 395 9947 HARRIS ELECTRIC INC Seattle WA 206 782 6668 OXARC INC Spokane WA 509 535 7794 PACIFIC WELDING SUPPLIES Tacoma WA 253 572 5302 PRECISION WELDER amp ENGINE REPAIR Seattle WA 206 382 6227 WEST VIRGINIA CARDINAL SALES amp SERVICE INC Clarksburg WV 304 622 7590 WILLARD C STARCHER Spencer WV 304 927 2520 WISCONSIN INTERSTATE WELDING SALES CORP Appleton WI 920 734 7173 MOSINEE MACHINE amp ELECTRIC Mosinee WI 715 693 0858 PRAXAIR DISTRIBUTION INC Brookfield WI 414 938 6365 VALLEY NATIONAL GASES Milwaukee WI 414 281 9540 Cobramatic II Owner s Manual Warranty Repair Stations as of 04 17 03 Please visit www mkproducts for most up to date listings WELDER REPAIR amp SERVICE INC Fredonia WI 262 692 3068 CANADA A amp A WELDER SERVICES LTD Saskatoon Saskatchewan 306 934 1601 ARC amp GENERATOR REPAIR Garson Ontario 705 525 2141 B HARRIS WELDING SVCS LTD Dartmouth Nova Scotia 902 46
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