Life is good 55LA7400 Flat Panel Television User Manual
Contents
1. Ro 20 Sel Sepe Asal HAS WARNING Spanish AVISO DE PRECAUCION French ATTENTION German WARNUNG ATEN O Chinese LEIA COMPREENDA AS INSTRUCOES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO E SIGA AS PRATICAS DE SEGURANCA DO EMPREGADOR MS o 0 SAAD HAY HHR ele BEHE TT LINCOLN 52. 10 20 Arc Lag Use a 5 15 leading angle in the direction of the cut Use the drag cup to maintain constant standoff for better cut quality and to protect the nozzle from spat ter Use the drag cup with a metal template to prevent nozzle double arcing e Finish the cut to be made and release the trigger When the trigger is released the arc will stop The gas will continue to flow for 10 seconds of postflow If the trigger is activated within this time period the pilot arc will immediately restart f the dross is difficult to remove reduce the cutting speed High speed dross is more difficult to remove than low speed dross The right side of the cut is more square than the left as viewed along the direction of travel Tilt the torch about 45 from the workpiece and hold the nozzle 1 8 3 2mm to 3 16 4 7mm above the workpiece for gouging Clean spatter and scale from the nozzle and drag cup frequently ANGLE OF APPROACH TORCH HELD AT 45 ANGLE THROUGHOUT GOUGE MAINTAINED THROUGHOUT Sears e If the SAFETY LED lights at any time check the following Check the assembly of the torch consumables If A WARNING ELECTRIC SHOCK CAN KILL Turn off machine at the disconnect switch on the front of the machine before tightening cleaning or replacing consumables they are not properly in place the machine will not start Make
3. 5 Check the filter element every several months to see if it is clogged weekly in very dirty environ ments Replace if necessary by first removing the two screws that attach the filter cage to the back panel assembly then slide the cage away from the back of the machine and remove Next twist the clear filter bowl until it comes off be careful not to lose the o ring seated at the top of the bowl threads Unscrew the filter element and replace with new element Assemble parts in reverse order as described above 6 Inspect the cable periodically for any slits or punc ture marks in the cable jacket Replace if neces sary Check to make sure that nothing is crushing the cable and blocking the flow of air through the air tube inside Also check for kinks in the cable periodically and relieve any so as not to restrict the flow of air to the torch PERIODIC MAINTENANCE A WARNING EN ELECTRIC SHOCK CAN KILL gt Turn off machine at the disconnect switch on the front of the machine before tightening cleaning or replacing consumables Change consumables as required 1 Thermal Protection Two thermostats protect the machine from excessive operating temperatures Excessive temperatures may be caused by a lack of cooling air or operating the machine beyond the duty cycle and output rating If excessive operating temperatures should occur the yellow thermal LED will light and the thermostat will prevent output voltage
4. a 80 60 5 55 Q 2 40 95 os e 20 8 A 35A 55 0 000 0 125 0 250 0 375 0 500 0 625 0 750 Material Thickness Figure B 1 CONSUMABLE LIFE The expected life for the Pro Cut 55 s electrode under normal operating conditions is approximately 320 starts cuts An erosion of 060 is typical for end of electrode life however the electrode life may last longer A green and erratic arc will indicate definite electrode failure and the electrode should be replaced immediately It is recommended that consumables be replaced in complete sets Example Electrode and Nozzle This will maximize the performance of the PRO CUT system PRO CUT 55 LINCOLN B 4 OPERATION B 4 LIMITATIONS Do not exceed output current and duty cycle rating of machine Do not use the PRO CUT 55 for pipe thaw ing CONTROLS AND SETTINGS Gas B Reset Purge Gas Indicators BW Button Regulator Gauge Output Gas Control Regulator Knob Knob LINCOLN 3 Consumable PRO CUT 55 Storage 1 behind door m x 8 Input Power odd x Switch Connector Work Cable When preparing to cut or gouge position the machine as close to the work as possible Make sure you have all materials needed to complete the job and have taken all safety precautions It is important to follow these operating steps each time you use the mac
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7. World s Leader in Welding and Cutting P roducts Sales and Service through Subsidiaries and Distributors Worldwide Cleveland Ohio 44117 1199 U S A TEL 216 481 8100 FAX 216 486 1751 WEB SITE www lincolnelectric com
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9. 85 165 32 kg 39 kg LINCOLN amp A 2 INSTALLATION A 2 Read entire Installation Section before installing the PRO CUT 55 SAFETY PRECAUTIONS A WARNING ELECTRIC SHOCK CAN KILL Only qualified personnel should install this machine 0 Turn the input power OFF at the disconnect switch or fuse box and discharge input capacitors before working inside the equipment e Do not touch electrically hot parts e Always connect the PRO CUT 55 ground ing terminal located on the side of the Case Back Assembly to a good electrical earth ground e Turn the PRO CUT Power Switch OFF when connecting power cord to input power SELECT PROPER LOCATION Place the Pro Cut 55 where clean cool air can freely circulate in through the rear louvers and out through the front bottom opening Dirt dust or any foreign material that can be drawn into the machine should be kept at a minimum Failure to observe these precau tions can result in excessive operating temperatures and nuisance shutdown of the machine A source of clean dry air or nitrogen must be supplied to the Pro Cut 55 Oil in the air is a severe problem and must be avoided The supply pressure must be between 80 and 150 psi The flow rate is approximate ly 6 0 cfm 170 l min Failure to observe these pre cautions could result in excessive operating tempera tures or damage to the torch STACKING The PRO CUT 55 cannot be stacked L
10. nect is positioned correctly for the input voltage used Wait at least 1 minute after power down before re connecting the machine Reconnect machine then restore power to Pro Cut Possible faulty Primary board Possible faulty Control board CAUTION If for any reason you do not understand the test procedures or are unable to perform the tests repairs safely contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed PRO CUT 55 LINCOLN 8 E 3 TROUBLESHOOTING E 3 Observe all Safety Guidelines detailed throughout this manual The Pro Cut powers up properly but 1 Press Purge button on the front of there is no response when the trig the Pro Cut If air does not flow ger is pulled and only the POWER then LED is lit a Auxiliary transformer may be faulty The main gas solenoid assem bly may be faulty Check or replace Possible faulty Output Power board d Possible faulty Control board check for continuity from the bulk head connector to the molex See Wiring Diagram Remove the handles or barrel of the torch and examine all the con nections Pay attention to location of electrode lead mounting at back of torch head broken trigger and solenoid leads If all recommended possible areas of misadjustment have been checked and the problem persists Contact your local Lincoln Authorized Field Service Facility Check f
11. clean secure connection Plasma will only cut conductive material Do not attempt to cut fiberglass plastic rubber PVC or any other non conductive material all recommended possible areas of misadjustment have been checked Make sure work piece is cleanland the problem persists Contact and dry Remove any scale rustlyour local Lincoln Authorized or dross Field Service Facility Check all connections to Output board Possible faulty Control board CAUTION If for any reason you do not understand the test procedures or are unable to perform the tests repairs safely contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed PRO CUT 55 LINCOLN 5 E 6 TROUBLESHOOTING E 6 Observe all Safety Guidelines detailed throughout this manual STATUS BOARD INDICATORS SYMPTOM CHECK Machine is unresponsive immediately after There is a 4 second soft start period for pre charging the input fil power up ter capacitors Wait until that time is up The Power LED will light when ready If not refer to the first part of this section The Air Low LED is lit Make sure there is at least 80 psi connected to the gas connec tion at the back of the machine Press the Purge button and set the regulator to 70 psi The pres sure may increase when air stops flowing but this is normal Do not reset the pressure while the air is OFF Possible faulty Pressure
12. conditions Test all procedures duplicating actual field conditions RECOMMENDED PROCESSES AND EQUIPMENT The PRO CUT 55 is capable of all cutting and goug ing applications within its output capacity of 25 to 55 amps These applications include thin gage sheet metal and expanded metal OPERATIONAL FEATURES AND CONTROLS The PRO CUT 55 comes with an ON OFF POWER SWITCH OUTPUT CURRENT CONTROL PURGE BUTTON and a SAFETY RESET BUTTON DESIGN FEATURES AND ADVANTAGES The microprocessor controlled PRO CUT 55 design makes plasma cutting and gouging tasks uncomplicat ed This list of design features and advantages will help you understand the machine s total capabilities So that you can get maximum use from your machine Light weight and portable design for industrial use Continuous control 25 55 amps Reliable touch start mechanism for plasma arc initi ation Unique microprocessor controlled starting sequence for safe and consistent starting Rapid arc transfer for fast cutting of expanded metal High transfer distance for ease of use Soft start of input filter capacitors at start up OPERATION Input over voltage protection Bright 3 0 second timed pilot arc Purge momentary push button Air regulator and pressure gage located on the front of machine for convenience Parts in Place mechanism to detect proper installa tion of consumables and torch Latching Parts in Place mechanism Requires a po
13. current continuous con trol plasma cutting power source It provides superior and reliable starting characteristics cutting visibility and arc stability When cutting expanded metal the Pro Cut 55 out performs the competition due to its quick clean response to arc transfers The power supply design provides high transfer to cut distances which makes pierce cutting more reliable and with less nozzle wear The control system has a safety mechanism to insure that the nozzle and electrode are in place before cutting or gouging This is extremely important due to the high voltages involved The Pro Cut 55 comes standard with an air regulator coarse air filter and pressure gauge The machine also comes with an 11 input power cord There are four different torch and cable systems to choose from hand held torch with 25 or 50 cable machine and robotic torch both with 25 and 50 cable Consumables are included with each Pro Cut pur chase so that cutting can begin right out of the box Consumables can also be ordered as individual pack ages An undercarriage kit can also be ordered sepa rately The Pro Cut 55 initiates the plasma arc with a simple yet reliable touch start mechanism This system elimi nates many of the failure problems associated with hi frequency start systems The Pro Cut 55 is capable of cutting with nitrogen or air Nitrogen is used to cut alu minum and other nonferrous metals The Pro Cut 55 is controlled by a
14. microprocessor based control board The machine performs rudimen tary self troubleshooting when powered up which aids in field servicing PREHEAT TEMPERATURE FOR PLASMA CUTTING Preheat temperature control is not necessary in most applications when plasma arc cutting or gouging Preheat temperature control may be necessary on high carbon alloy steels and heat treated aluminum for crack resistance and hardness control Job conditions pre vailing codes alloy level and other considerations may also require preheat temperature control The following minimum preheat temperature is recommended as a starting point Higher temperatures may be used as required by the job conditions and or prevailing codes If cracking or excessive hardness occurs on the cut face higher preheat temperature may be required The recommended minimum preheat temperature for plate thickness up to 1 2 12 7mm is 70 F 21 1 C PRO CUT 55 LINCOLN B 2 USER RESPONSIBILITY Because design fabrication erection and cutting vari ables affect the results obtained in applying this type of information the serviceability of a product or struc ture is the responsibility of the user Variation such as plate chemistry plate surface condition oil scale plate thickness preheat quench gas type gas flow rate and equipment may produce results different than those expected Some adjustments to procedures may be necessary to compensate for unique individ ual
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16. 5 or 50 cables All torches are connected to the Pro Cut with a quick connect at the bulkhead for easy change over This feature is excellent for changing between a hand cut ting torch and a mechanized torch This feature is also handy for troubleshooting For more information on the torch and its components refer to the PCT80 Operators Manual IM588 latest version PRO CUT 55 LINCOLN B 1 OPERATION B 1 Read and understand this entire section before oper ating the machine SAFETY PRECAUTIONS A WARNING ELECTRIC SHOCK can kill Do not touch electrically live parts or electrode with skin or wet clothing Insulate yourself from work and ground Always wear dry insulating gloves FUMES AND GASES 2 can be dangerous S AR Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zone WELDING CUTTING and GOUGING SPARKS can cause fire or explosion Keep flammable material away Do not weld cut or gouge on containers that have held combustibles ARC RAYS can burn Wear eye ear and body protection PLASMA ARC can injure V Keep your body away from nozzle and plasma arc e Operate the pilot arc with caution The pilot arc is capable of burning the operator others or even piercing safety clothing Observe additional Safety Guidelines detailed in the beginning of this manual DESCRIPTION The Pro Cut 55 is a constant
17. AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS 1 e ELECTRIC SHOCK can kill 1 a The electrode and work or ground circuits are electrically hot when the power source is on Do not touch these hot parts with your bare skin or wet clothing Wear dry hole free gloves to insulate hands When the power source is operating voltages in excess of 250 volts are produced This creates the potential for serious electrical shock potentially even fatal Insulate yourself from work and ground using dry insulation When cutting or gouging in damp locations on metal frame work such as floors gratings or scaffolds and when in posi tions such as sitting or lying make certain the insulation is large enough to cover your full area of physical contact with work and ground Always be sure the work cable makes a good electrical con nection with the metal being cut or gouged The connection should be as close as possible to the area being cut or gouged Ground the work or metal to be cut or gouged to a good elec trical earth ground 1 f Maintain the plasma torch cable and work clamp in good 1 0 1 h safe operating condition Replace damaged insulation Never dip the torch in water for cooling or plasma cut or gouge in or under water When working above floor level protect yourself from a fall should you get a shock 1 i Operate the pilot arc with caution The pilot arc is c
18. IFTING AND MOVING Either the front or rear handles or both may be used to lift or move the machine DO NOT use the pull handle on the optional undercar riage if installed to lift the machine This handle is not designed to support the full weight of the machine and using it to lift the machine could cause personal injury or damage to the machine TILTING The PRO CUT 55 must be placed on a stable level surface so it will not topple over HIGH FREQUENCY INTERFERENCE PROTECTION The Pro Cut 55 employs a touch start mechanism for arc initiation which eliminates high frequency emis sions from the machine as compared with spark gap and solid state type high frequency generators Keep in mind though that these machines may be used in an environment where other high frequency generat ing machines are operating By taking the following steps high frequency interference into the Pro Cut can be minimized 1 Make sure the power supply chassis is connected to a good earth ground The work terminal ground does NOT ground the machine frame 2 Keep the work ground clamp isolated from other work clamps that have high frequency 3 If the ground clamp cannot be isolated then keep the clamp as far as possible from other work clamp connections 4 When the machine is enclosed in a metal building several good earth driven electrical grounds around the periphery of the building are recom mended Failure to observe
19. PRO CUT 55 December 2002 For use with machines having Code Numbers 10473 10474 10475 and 10476 Safety Depends on You Lincoln arc welding and cutting equipment is designed and built with safety in mind However your overall safety can be increased by proper installation and thought ful operation on your part DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT And most importantly think before you act and be careful Date of Purchase Serial Number Code Number Model Where Purchased SSS eee OPERATOR S MANUAL E LINCOLN 5 e World s Leader in Welding and Cutting Products e Sales and Service through Subsidiaries and Distributors Worldwide Cleveland Ohio 44117 1199 U S A TEL 216 481 8100 FAX 216 486 1751 WEB SITE www lincolnelectric com WARNING PLASMA CUTTING or GOUGING can be hazardous PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH KEEP CHILDREN AWAY PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING Read and understand the following safety highlights For additional safety information it is strongly recommended that you pur chase a copy of Safety in Welding amp Cutting ANSI Standard 249 1 from the American Welding Society P O Box 351040 Miami Florida 33135 or CSA Standard W117 2 BE SURE THAT ALL INSTALLATION OPERATION MAINTENANCE
20. RO CUT 55 LINCOLN D 1 A WARNING e ELECTRIC SHOCK can kill Have an electrician install and service this equipment Turn the input power off at the fuse box before working on equipment Do not touch electrically hot parts Prior to Performing preventative main tenance perform the following capaci tor discharge procedure to avoid elec tric shock INPUT FILTER CAPACITOR DISCHARGE PROCEDURE Turn off input power or disconnect input power lines Remove the 5 16 hex head screws from the side and top of the machine and remove wrap around MAINTENANCE 4 D 1 Obtain a high resistance and high wattage resistor 25 1000 ohms and 25 watts minimum This resis tor is not supplied with machine NEVER USE A SHORTING STRAP FOR THIS PROCEDURE Locate the two capacitor terminals large hex head cap screws on the top and bottom of the Power P C Board shown in Figure D 1 Use electrically insulated gloves and insulated pli ers Hold body of the resistor and connect resistor leads across the two capacitor terminals Hold resistor in place for 10 seconds DO NOT TOUCH CAPACITOR TERMINALS WITH YOUR BARE HANDS Repeat discharge procedure for the other capaci tor Check voltage across terminals of all capacitors with a DC voltmeter Polarity of capacitor terminals machine cover is marked on PC board above terminals Voltage should be zero If any voltage remains repeat this 3 Be car
21. Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty For your safety and to avoid Electrical Shock please observe all safety notes and precautions detailed throughout this manual This Troubleshooting Guide is provided to help you locate and repair possible machine malfunctions Simply follow the three step procedure listed below Step 1 LOCATE PROBLEM SYMPTOM Look under the column labeled PROBLEM SYMPTOMS This column describes possible symptoms that the machine may exhibit Find the listing that best describes the symptom that the machine is exhibiting Step 2 POSSIBLE CAUSE The second column labeled POSSIBLE CAUSE lists the obvious external possibili ties that may contribute to the machine symptom Step 3 RECOMMENDED COURSE OF ACTION This column provides a course of action for the Possible Cause generally it states to contact you local Lincoln Authorized Field Service Facility If you do not understand or are unable to perform the Recommended Course of Action safely contact you local Lincoln Authorized Field Service Facility A WARNING ELECTRIC SHOCK CAN KILL E e e Turn off machine at the disconnect switch on the front of the machine and remove main power supply connec tions before doing any troublesho
22. Switch Possible faulty Control board The Safety LED is flashing Make sure there is a Lincoln torch and cable assembly connect ed properly to the Pro Cut bulk head connector Check consumables for proper installation or excessive wear Replace if excessively worn If not use a piece of fine emery cloth to remove any oxide buildup on the tip of the electrode The Safety LED is lit and steady Press the Reset button If torch and consumables are properly installed the Safety LED should turn off Normal cutting or goug ing can resume The Thermal LED is lit The machine s thermostat has tripped due to exceeded duty cycle limits Do NOT turn the power off Allow the machine to cool for 15 30 minutes and the thermostat will reset itself The machine s air louvers or fans are obstructed such that air cannot flow to properly cool the machine Remove any foreign material that may block air flow Blow the machine out with a clean dry air stream Possible faulty Control board PRO CUT 55 LINCOLN 8 y I 2 lt tc 9 a a 2 lt I DIAGRAMS Jequunu 3002 1ueuudinbe eu SAID 104 lueuleded 30113 eu ol SIdIBSIII SI au J SISUBd eunsoj oue y euo UO y SDISUI pejsed si SDOO sejnomed 991 jJenueui siy Aq 0013 02 40 eq jou Aew 1 759017
23. a zone de soudage Ceci est particuli rement important pour le soudage de t les galvanis es plomb es ou cadmi es ou tout autre m tal qui produit des fume s toxiques Ne pas souder en pr sence de vapeurs de chlore provenant d op rations de d graissage nettoyage ou pistolage La chaleur ou les rayons de l arc peuvent r agir avec les vapeurs du solvant pour produire du phosg ne gas fortement toxique ou autres produits irritants Pour obtenir de plus amples renseignements sur la s ret voir le code Code for safety in welding and cutting CSA Standard W 117 2 1974 Som PR CAUTIONS DE S RET POUR Un coup d arc peut tre plus s v re qu un coup de soliel LES MACHINES SOUDER D TRANSFORMATEUR ET a Utiliser un bon masque avec un verre filtrant appropri REDRESSEUR ainsi qu un verre blanc afin de se prot ger les yeux du ray onnement de l arc et des projections quand on soude ou quand on regarde l arc 1 b Porter des v tements convenables afin de prot ger la peau de soudeur et des aides contre le rayonnement de l arc c Prot ger l autre personnel travaillant proximit au soudage l aide d crans appropri s et non inflammables Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de l huile tels que les gants en cuir chemise paisse pan talons sans revers et chaussures montantes LINCOLN 8 Relier la ter
24. ams n Section F Wiring DIAG KANN oii omi Bo ir rex BED DE sss F 1 Dimension dap P E F 2 Parts WSU E nlii P309 Series amp P210 K 1 INSTALLATION 1 TECHNICAL SPECIFICATIONS PRO CUT 55 INPUT SINGLE or THREE PHASE 60 HERTZ ONLY Standard Voltage 19 Input Current at Rated Output 30 Input Current at Rated Output 230 460 1 or 30 60 Hz 230V 55A 50 40A 100 230V 28A 50 21A 100 460V 30A 50 23A 100 460V 17A 50 15A 100 Idle Current 0 42 Amps Idle Power 98 Watts 230V RATED OUTPUT Duty Cycle AMPS 50 Duty Cycle 55 100 Duty Cycle 40 OUTPUT Current Open Circuit Pilot Current Range Voltage MAX 18 Amps 100 Duty Cycle 25 55 Amps 335 VDC REQUIRED GAS FLOW RATE REQUIRED GAS INLET PRESSURE 70 PSI 360 SCFH 80 to 150 PSI 4 8 Bar 10160 LHR 5 4 Bar TO 10 2 Bar RECOMMEND INPUT WIRE AND FUSE SIZES For all plasma cutting applications Based on U S National Electrical Code Ambient Temperature 30 C or Less AC Input Fuse Type 75 C Voltage at Super Lag Copper Wire in Conduit AWG IEC Sizes 60 Hertz Circuit Breaker Delay Type Input Supply Wire Ground Wire 70 AMPS 8 8 4mm 10 5 3mm 40 AMPS 8 8 4mm 10 5 3mm 40 AMPS 10 5 3mm 10 5 3mm 20 AMPS 10 5 3mm 10 5 3mm PHYSICAL DIMENSIONS Weight Including Machine Torch Cable Length 25fU7 6m 504 15 2 70 lbs
25. apable of burning the operator others or even piercing safety clothing 1 j Also see Items 4c and 6 2 b 2 0 ARC RAYS can burn 2 a Use safety glasses and a shield with the prop er filter and cover plates to protect your eyes from sparks and the rays of the arc when performing or observing plasma arc cutting or gouging Glasses headshield and filter lens should conform to ANSI Z87 standards Use suitable clothing including gloves made from durable flame resistant material to protect your skin and that of your helpers from the arc rays Protect other nearby personnel with suitable non flammable screening and or warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or metal LINCOLN 8 Where compressed gases are to be used at the job site spe When not cutting or gouging make certain no part of the elec Do not cut or gouge tanks drums or containers until the prop Vent hollow castings or containers before heating cutting or Do nor fuel engine driven equipment near area where plasma FUMES AND GASES can be dangerous 3 a Plasma cutting or gouging may produce fumes and gases hazardous to health Avoid breathing these fumes and gases When cutting or gouging keep your head out of the fumes Use enough ventilation and or exhaust at the arc to keep fumes and gases away from the breathing zone When cutting or gouging on lead or cadmium plated steel and ot
26. c may sputter or start intermittently This is aggravated when the consumables are worn or the air pressure is too high Always keep in mind that the pilot arc is designed to transfer the arc to the work piece and not for numerous starts without cutting When the pilot arc is started a slight impulse will be felt in the torch handle This occurrence is normal and is the mechanism which starts the plasma arc This impulse can also be used to help troubleshoot a no start condition PROCEDURE RECOMMENDATIONS When properly used plasma arc cutting or gouging is a very economical process Improper use will result in a very high operating cost General In All Cases Follow safety precautions as printed throughout this operating manual and on the machine Thin Gauge Sheet Metal Torch Standoff Machine Output Setting DRAG thru 1 16 Standoff Output Setting Min thru Mid Range Output set below mid range The nozzle may be dragged on the metal sur face touching it lightly to the surface after pierc ing a hole Current control should be set below the mid range Do not allow cable or body to contact hot sur face Thick Sections of Metal Torch Standoff Machine Output Setting Q Output Setting Mid thru Max Range 1 8 thru 3 16 Standoff Output set above mid range The best quality and consumable life will be obtained by holding the torch off the surface abou
27. e extinguisher readily available cial precautions should be used to prevent hazardous situa tions Refer to Safety in Welding and Cutting ANSI Standard 249 1 and the operating information for the equip ment being used trode circuit is touching the work or ground Accidental con tact can cause overheating and create a fire hazard er steps have been taken to insure that such procedures will not cause flammable or toxic vapors from substances inside They can cause an explosion even though they have been cleaned For information purchase Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping That Have Held Hazardous Substances AWS F4 1 from the American Welding Society see address above gouging They may explode cutting or gouging Apr 93 4 g Sparks and spatter are thrown from the plasma arc Wear safety glasses ear protection and oil free protective garments such as leather gloves heavy shirt cuffless trousers high shoes and a cap over your hair Wear ear plugs when cutting or gouging out of position or in confined places Always wear safety glasses with side shields when in a cutting or gouging area 4 h Connect the work cable to the work as close to the cutting or gouging area as practical Work cables connected to the build ing framework or other locations away from the cutting or gouging area increase the possibility of the current passing thr
28. eful not to make contact with the capacitor capacitor discharge procedure terminals that are located on the top and bottom of the Power Board on the right side of the machine FIGURE D 1 LOCATION OF INPUT FILTER CAPACITOR TERMINALS UPPER CAPACITOR TERMINALS POWER BOARD LOWER CAPACITOR TERMINALS POWER RESISTOR INSULATED PLIERS RIGHT SIDE OF MACHINE INSULATED GLOVES PRO CUT 55 LINCOLN 5 D 2 MAINTENANCE D 2 ROUTINE MAINTENANCE 1 Keep the cutting or gouging area and the area around the machine clean and free of combustible materials No debris should be allowed to collect which could obstruct air flow to the machine 2 Every 6 months or so the machine should be cleaned with a low pressure airstream Keeping the machine clean will result in cooler operation and higher reliability Be sure to clean these areas Power Output and Control printed circuit boards and heat sinks Power switch Main Transformer Input Rectifier 3 Examine the sheet metal case for dents or break age Repair the case as required Keep the case in good condition to insure that high voltage parts are protected and correct spacings are maintained All external sheet metal screws must be in place to insure case strength and electrical ground continu ity 4 Check the air regulator filter to be sure it does not become clogged The air filter on the machine is self draining and will not have to be emptied
29. flow time is skipped and the pilot arc will start immediate ly The pilot arc will run for 3 0 seconds and shut off unless the arc is brought in contact with the work and the arc is transferred Avoid excessive pilot arc time by transferring the arc to the workpiece quickly to improve parts life When the arc is brought within 1 4 from the work piece the arc will transfer the current will ramp up to the setting on the control panel and the cut can last indefinitely or until the duty cycle of the Pro Cut is exceeded Do not touch the nozzle to the work when cutting with the control panel setting above mid range or dam age to the consumables will result Pierce the work piece by slowly lowering the torch onto the metal at a 30 angle away from the opera tor This will blow the dross away from the torch tip Slowly rotate the torch to vertical position as the arc becomes deeper TORCH AT 30 ANGLE TO PIERCE ROTATE TO 90 ANGLE TO CUT 90 VERTICAL ANGLE FOR CUTTING PRO CUT 55 LINCOLN B 5 OPERATION B 5 Hold the nozzle standoff 1 8 3 2mm to 3 16 4 7mm above the workpiece during cutting Do not let the torch nozzle touch the work or carry a long arc Keep moving while cutting Cut at a steady speed without pausing Maintain the cutting speed so that the arc leg is 10 to 20 behind the travel direction 5 15 Leading Angle gt Direction of Travel 1
30. her metals or coatings which produce highly toxic fumes keep exposure as low as possible and below Threshold Limit Values TLV using local exhaust or mechanical ventilation In confined spaces or in some circumstances outdoors a respirator may be required Additional precautions are also required when welding on galvanized steel Do not use plasma arc cutting or gouging in locations near chlorinated hydrocarbon vapors coming from degreasing cleaning or spraying operations The heat and rays of the arc can react with solvent vapors to form phosgene a highly toxic gas and other irritating products Gases used for plasma cutting and gouging can displace air and cause injury or death Always use enough ventilation especially in confined areas to insure breathing air is safe Read and understand the manufacturer s instructions for this equipment and the consumables to be used including the material safety data sheet MSDS and follow your employ er s safety practices CUTTING SPARKS can cause fire or explosion 4 a Remove fire hazards from the plasma cut ting or gouging area If this is not possible cover them to prevent the cutting or gouging sparks from starting a fire Remember that welding sparks and hot materials from plasma cutting or gouging can easily go through small cracks and openings to adjacent areas Avoid cutting or gouging near hydraulic lines Have a fir
31. hine Turn the machine s ON OFF POWER SWITCH to OFF position Connect the air supply to the machine Turn the main power and the machine power switch on The fan should start The pre charge circuit will operate for 3 seconds then the green Power LED should turn on If the SAFETY LED is lit push the Reset but ton If there is no problem the LED will go off If there is a problem refer to Step SAFETY LED in this section Be sure that the work lead is clamped to the work piece before cutting Set the output current control knob at maximum position for high cutting speed and less dross forma tion Reduce the current if desired to reduce the kerf cut width heat affected zone or travel speed as required Push in and hold the Purge button to check or set the gas pressure Pull the pressure regulator cap out and turn it to set the pressure Adjust the gas regulator for 70 PSI for 25 torch es or 75 PSI for 50 torches Release the Purge button The gas will immediately turn off The pressure gage may show an increase in pressure after the air turns off but this is normal Do NOT reset the pressure while the air is NOT flowing When ready to cut place the torch near the work make certain all safety precautions have been taken and pull the trigger The air will flow for a preflow time of 2 seconds and the pilot arc will start This is true unless the machine is in postflow then the pre
32. hine If necessary this fitting can be removed allowing plumbing access through the 1 4 NPT input port on the filter body f compressed air is being used it is highly recom mended that an inline prefilter be installed in the air supply line ahead of the air connection to the PRO CUT s coalescing filter While the coalescing filter is used to remove small amounts of oil and water aerosol particles from the air supply line the prefilter can be used to remove larger particulates before they reach the coalescing filter element This will pro long the life of the coalescing filter element by up to Six times what it would be without the prefilter and in turn prolong the life of the PRO CUT torch and con sumables as well A standard nominal 5 micron inline prefilter is recom mended however for optimum performance select a prefilter with a 3 micron absolute rating If these fil ter ratings are unavailable anything with a rating less than or equal to 20 micron would be accept able to use In line filter elements will generally filter the air with little restriction to the airflow until the ele ment is about 75 contaminated After this point there will be a noticeable pressure drop in the line Filter elements should be replaced when a pressure drop of 8 10 psi is indicated however for optimum performance of the PRO CUT the filter element should be replaced at or before the pressure drop reaches 8 psi Be sure to select a
33. iliby s eiie io e icto aquqa e rete Dia B 2 Recommended Processes and Equipment B 2 Operational Features and Controls ss 2 Design Features and Advantages es B 2 ua X aE B 3 Consumable Life B 3 Limiltatioris EE B 4 Gontrols and Settings dn re te He e es B 4 Pilot oci Em B 6 Procedure Recommendations iii B 6 General M B 6 Thin Gauge SheetlMetal 1 desc erdt rise tae recie DRE Ok or erae B 6 Thick Sections of Metal Suggestions for Extra Utility from the PRO CUT System B 7 ACC655011886 uuu Section C Genuine Lincoln PARS cs 1 e C 1 General Options Accessories C 1 vii TABLE OF CONTENTS Page Maintenance ELE Section D Safety Precautions u uum reete bon e D 1 Input Filter Capacitor Discharge Procedure D 1 Routine u tice e entr puc ex D 2 P riodi EE D 2 Troubleshooting LLL III IIIa Section E Safely e a e E 1 How to Use Troubleshooting Guide E 1 Troubleshooting G ide yun u u tee 2 Wiring Diagr
34. input power cord as it passes through the left rear access hole The cord connector is designed for a cord diameter of 40 1 03 in 10 2 26 2mm if it becomes necessary to install a different input cord For three phase connection Replace input power cord with a 10 AWG 4 lead cable 1 Connect leads of input power cord to a fused power panel Make sure the green lead is con nected to the panel and the panel is connected to a good earth ground Install in accordance with all local and national electric codes FRAME GROUNDING The frame of the Pro Cut 55 must be properly ground ed A ground terminal is mounted on the case bottom directly behind the input power switch for this purpose The cable that is sent attached to the machine is con nected to this ground terminal See the National Electric Code for details on proper grounding meth ods Install in accordance with all local and national electrical codes PRO CUT 55 LINCOLN 5 A 4 INSTALLATION A 4 GAS INPUT CONNECTIONS Supply the PRO CUT 55 with clean compressed air or nitrogen e Supply pressure must be between 80 psi and 150 psi Flow rate should be approximately 6 0 cfm 170 I min NOTE Oil in the air supply to the PRO CUT 55 can cause severe problems Use only a clean air supply Connect the gas supply to the PRO CUT 55 regulator Compressed gas should be supplied to the fit ting connection mounted on the filter at the rear of the mac
35. is equipment Save this manual and keep it handy for quick reference Pay particular attention to the safety instructions we have provided for your protection The level of seriousness to be applied to each is explained below A WARNING This statement appears where the information must be followed exactly to avoid serious personal injury or loss of life A CAUTION This statement appears where the information must be followed to avoid minor personal injury or damage to this equipment TABLE OF CONTENTS Page Installation I u u uu u u UQ Section A Technical Specificatioris u a u ai vind e e A 1 Safely S chats cede AEA 2 Select Proper Location sis A 2 STACKING 0 0 0 E E E ET A 2 Lifting arid irre n teer alt repos brio A 2 Ee EE A 2 High Frequency Interference Protection A 2 Inp t Electrical Connections ecce naan A 3 Input Power Cord Connector Installation A 3 Frame RE EE A 3 Gas Input Connections sis A 4 OQ tp t 2 1 e eaa ena Ea aaaeaii A 4 Torch Conneetiofiku g 1 na Bi Mines A 4 us 2 12 10100100 Section B Safely PrEGAUUONS sagem ee date nine B 1 8 2 ERE B 1 Preheat Temperature for Plasma Cultting seen B 1 User Besporsib
36. istance on Output Power board between B1 and B21 If 2100 possible fault in torch and cable assembly If all recommended possible areas of misadjustment have been checked Possible fault in Output board and the problem persists Contact your local Lincoln Authorized The air begins to flow and there is a 1 Check the torch consumables tolField Service Facility very brief arc that snaps out consis be sure they are in tight not dirty tently with repeated trigger pulls or greasy and in good shape Replace if necessary Make sure the air pressure is set at 70 psi Possible fault in Output Power board The arc starts but sputters badly Check the torch consumables to be sure they are in tight not dirty or greasy and in good shape Replace if necessary Check air supply for oil or a great deal of water If there is oil or a great deal of water the air must be filtered or the machine switched to nitrogen or bot tled air Make sure the air pressure is set at 70 psi A CAUTION If for any reason you do not understand the test procedures or are unable to perform the tests repairs safely contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed PRO CUT 55 LINCOLN E 5 TROUBLESHOOTING E 5 Observe all Safety Guidelines detailed throughout this manual Pilot arc starts but will not transfer 1 Check work lead connection for when brought near work
37. n und K r perschutz Use prote o para a vista ouvido e corpo e ez 119 59 s ESSAI READ AND UNDERSTAND THE MANUFACTURER S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE USED AND FOLLOW YOUR EMPLOYER 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 Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zone Los humos fuera de la zona de res piraci n e Mantenga la cabeza fuera de los humos Utilice ventilaci n o aspiraci n para gases e 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 e Vermeiden Sie das Einatmen von Schweibrauch Sorgen Sie fiir gu
38. nozzle tip i Use only Lincoln consumable parts These parts are patented and using any other replacement consumables may cause damage to the torch or reduce cut quality C1 ACCESSORIES C 1 ALWAYS USE GENUINE LINCOLN ELECTRIC ELECTRODES AND VORTECH NOZZLES Only Genuine Lincoln Electric consumables yield the best cutting performance for the PRO CUT 55 The patented VORTECH nozzle provides an extra kick of swirl as the arc exits the nozzle which improves cutting performance No other nozzle has this capability or can match its performance GENERAL OPTIONS ACCESSORIES The following options accessories are available for your PRO CUT 55 from your local Lincoln Distributor K1600 1 Undercarriage A valet style undercarriage with pull out handle for machine only Provides Torch and Work Cable storage 22147 043 VORTECH nozzle with an 043 1 2 mm Orifice 22147 068 VORTECH nozzle with an 068 1 7 mm Orifice 22149 Electrode replacement electrodes for cut ting 22150 Shield Cup This shields the torch tip and provides more visibility to the workpiece than the drag cup Note the shield cup does not prevent the torch tip from touching the workpiece 522151 Drag Cup The drag cup protects the torch by preventing the torch from touching the workpiece K1571 Series PCT 80 Torches come in 25 and 50 lengths in either hand held or mechanized versions P
39. nt les parties sous tension des porte lectrodes connect s deux machines souder parce que la tension entre les deux pinces peut tre le total de la tension vide des deux machines Si on utilise la machine souder comme une source de courant pour soudage semi automatique ces precautions pour le porte lectrode s applicuent aussi au pistolet de soudage 2 Dans le cas de travail au dessus du niveau du sol se prot ger contre les chutes dans le cas ou on recoit un choc Ne jamais enrouler le c ble lectrode autour de n importe quelle partie soudage Utiliser des lunettes avec crans lateraux dans les zones l on pique le laitier Eloigner les mat riaux inflammables ou les recouvrir afin de pr venir tout risque d incendie d aux tincelles Quand on ne soude pas poser la pince une endroit isol de la masse Un court circuit accidental peut provoquer un chauffement et un risque d incendie S assurer que la masse est connect e le plus pr s possible de la zone de travail qu il est pratique de le faire Si on place la masse sur la charpente de la construction ou d autres endroits loign s de la zone de travail on augmente le risque de voir passer le courant de soudage par les chaines de lev age c bles de grue ou autres circuits Cela peut provoquer des risques d incendie ou d echauffement des chaines et des c bles jusqu ce qu ils se rompent Assurer une ventilation suffisante dans l
40. or current Thermostats are self resetting once the machine cools sufficiently If the thermostat shutdown was caused by excessive output or duty cycle and the fan is operating normally the Power Switch may be left on and the reset should occur within a 15 minute period If the fan is not turning or the air intake louvers were obstructed then the power must be switched off and the fan prob lem or air obstruction must be corrected 2 Filter Capacitor Conditioning Pro Cut 55 400 460 VAC only A protection circuit is included to monitor the voltage across filter capacitors C1 and C2 In the event that the capacitor voltage is too high the protection circuit will prevent output The protection circuit may prevent output providing all these circumstances are met a Machine is connected for 400 460 VAC input b Machine did not have power applied for many months c Machine will not produce output when power is first switched on If these circumstances apply the proper action is to switch the machine on and let it idle for up to 30 min utes This is required to condition the filter capacitors after an extended storage time The protection circuit will automatically reset once the capacitor conditioning and resultant voltage levels are acceptable It may be necessary to turn the power switch off and back on again after this period PRO CUT 55 LINCOLN TROUBLESHOOTING E 1 HOW TO USE TROUBLESHOOTING GUIDE A WARNING
41. or proper trigger switch operation Remove the torch cable assembly from the Pro Cut and test for continuity between 9 and 1 at the quick connect when the trig ger switch is depressed and no continuity when the switch is not depressed Replace the trigger Switch or torch cable if defective Possible faulty Control board Possible faulty Output Power board CAUTION If for any reason you do not understand the test procedures or are unable to perform the tests repairs safely contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed PRO CUT 55 LINCOLN 8 E 4 TROUBLESHOOTING E 4 Observe all Safety Guidelines detailed throughout this manual PROBLEMS POSSIBLE AREAS OF RECOMMENDED SYMPTOMS MISADJUSTMENTS S COURSE OF ACTION When the trigger is pulled air begins 1 Check the torch consumables to be to flow but there is no pilot arc after sure they are not dirty or greasy at least 3 seconds and are in good shape Replace the consumables if necessary Make sure the air pressure is set at 70 psi Make sure there are no kinks or restrictions for air flow in the torch cable Replace cable as needed If a slight thump cannot be felt in the torch when the trigger is pulled check for loose connection in the torch head and solenoid assembly With machine turned off input power removed and torch and consumables connected mea sure res
42. orch cable is on your right side the work cable should also be on your right side Connect the work cable to the workpiece as close as possible to the area being cut or gouged Do not work next to cutting power source Apr 93 LINCOLN NOTES LINCOLN SAFETY PRECAUTIONS DE S RET 5 Toujours porter des lunettes de s curit dans la zone de Pour votre propre protection lire et observer toutes les instructions et les pr cautions de s ret specifiques qui parraissent dans ce manuel aussi bien que les pr cautions de s ret g n rales suiv antes S ret Pour Soudage A L Arc 1 Protegez vous contre la secousse lectrique a Les circuits l lectrode et la pi ce sont sous tension quand la machine souder est en marche Eviter toujours tout contact entre les parties sous tension et la peau nue ou les v tements mouill s Porter des gants secs et sans trous pour isoler les mains Faire tr s attention de bien s isoler de la masse quand on soude dans des endroits humides ou sur un plancher metallique ou des grilles metalliques principalement dans les positions assis ou couch pour lesquelles une grande partie du corps peut tre en contact avec la masse Maintenir le porte lectrode la pince de masse le c ble de soudage et la machine souder en bon et s r tat defonctionnement d Ne jamais plonger le porte lectrode dans l eau pour le refroidir Ne jamais toucher simultan me
43. oting CAUTION PRO CUT 55 LINCOLN If for any reason you do not understand the test procedures or are unable to perform the tests repairs safely contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed E 2 TROUBLESHOOTING E 2 Observe all Safety Guidelines detailed throughout this manual No Status indicators light and the fan 1 Check the input power to be sure does not operate 5 seconds after the itis on power switch is turned on Check the power line fuses and machine connection Disconnect input power at fuse panel and check line switch conti nuity Replace line switch if bad Auxiliary transformer may be faulty No Status indicators light 5 seconds 1 Auxiliary transformer may be after the power switch is turned on faulty but the fan operates Disconnect input power from the machine Check that connectors on harness between Control Bd and Display Bd are properly seat If all recommended possible areas of misadjustment have been checked Possible faulty Control Board and the problem persists Contact your local Lincoln Authorized Field Service Facility All Status indicators remain lit imme 1 The microprocessor has experi diately after power up enced a memory fault Consult local Lincoln Field Service shop All Status indicators begin to blink 1 Turn power off Make sure recon within 5 seconds after power up
44. ough lifting chains crane cables or other alternate circuits This can create fire hazards or overheat lifting chains or cables until they fail CYLINDER may explode if damaged 5 a Use only compressed gas cylinders contain ing the correct gas for the process used and properly operating regulators designed for the gas and pressure used All hoses fittings etc should be suitable for the application and maintained in good condition 5 b Always keep cylinders in an upright position securely chained to an undercarriage or fixed support 5 c Cylinders should be located Away from areas where they may be struck or subjected to physical damage A safe distance from plasma cutting or gouging arc weld ing operations and any other source of heat sparks or flame 5 d Never allow any part of the electrode torch or any other electrically hot parts to touch a cylinder 5 e Keep your head and face away from the cylinder valve outlet when opening the cylinder valve 5 f Valve protection caps should always be in place and hand tight except when the cylinder is in use or connected for use 5 g Read and follow the instructions on compressed gas cylin ders associated equipment CGA publication P I Precautions for Safe Handling of Compressed Gases in Oylinders available from the Compressed Gas Association 1235 Jefferson Davis Highway Arlington VA 22202 FOR ELECTRICALLY powered equipment 6 a Tu
45. prefilter that will accommodate the necessary flow rating for the PRO CUT as specified in the Installation section of this instruction manual under the Gas Input Connections heading While it is recommended that an in line prefilter be placed ahead of each PRO CUT that may be installed in a shared air supply line one large inline prefilter may be used to accommodate several PRO CUTs simultaneously If a shared prefilter is desired it must be rated to provide the necessary flow rate as specified to ensure proper operation of each of the PRO CUTS sharing a connection NOTE When using nitrogen gas from a cylinder the cylinder must have a pressure regulator Maximum psi from nitrogen gas cylinder to PRO CUT 55 regulator should never exceed 150 psi e Install a hose between the nitrogen gas cylinder regulator and the PRO CUT 55 gas inlet A WARNING CYLINDER could explode if damaged Keep cylinder upright and chained to a fixed support 7 Keep cylinder away from areas where it could be damaged Never lift machine with cylinder attached Never allow the cutting torch to touch the cylinder Keep cylinder away from live electrical parts e Maximum inlet pressure 150 psi OUTPUT CONNECTIONS Torch Connection The Pro Cut 55 is sent from the factory with a PCT 80 cutting torch Additional cutting torches can be ordered from the K1571 series Hand held and mech anized torches come with 2
46. r feuchter Kleidung Isolieren Sie sich von den Elektroden und dem Erdboden e toque partes el tricas e elec trodos com a pele ou roupa molha da Isole se da pega e terra E GUB see eti RE CRM ER SHEE Xe HZA e 2x9 HIE Weal Y Jio 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 inflamaveis bem guarda dos e eis EHS Ac AI uie Wear eye ear and body protection e Prot jase los ojos los 01005 y el cuerpo Prot gez vos yeux vos oreilles et votre corps Tragen Sie Augen Ohre
47. re le chassis du poste conformement au code de l lectricit et aux recommendations du fabricant Le dispositif de montage ou la piece souder doit tre branch une bonne mise la terre Autant que possible l installation et l entretien du poste seront effectu s par un lectricien qualifi Avant de faires des travaux l interieur de poste la debranch er l interrupteur la boite de fusibles Garder tous les couvercles et dispositifs de s ret leur place Mar 93 v v for selecting a QUALITY product by Lincoln Electric We want you Thank You to take pride in operating this Lincoln Electric Company product eee as much pride as we have in bringing this 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 replacement parts for or information on this equipment always supply the information you have recorded above Read this Operators Manual completely before attempting to use th
48. rn off input power using the disconnect switch at the fuse box before working on the equipment Install equipment in accordance with the U S National Electrical Code all local codes and the manufacturer s rec ommendations 6 c Ground the equipment in accordance with the U S National Electrical Code and the manufacturer s recommendations SAFETY LE PLASMA ARC can injure ki 7 a Keep your body away from nozzle and plasma arc 7 b Operate the pilot arc with caution The pilot arc is capable of burning the operator others or even piercing safety clothing ELECTRIC AND MAGNETIC FIELDS may be dangerous 8 a Electric current flowing through any con ductor causes localized Electric and Magnetic Fields EMF Cutting or gouging current cre ates EMF fields around torch cables and cutting machines 9 Aan 8 b EMF fields may interfere with some pacemakers so opera tors having a pacemaker should consult their physician before cutting or gouging 8 c Exposure to EMF fields during cutting or gouging may have other health effects which are now not known 8d All operators should use the following procedures in order to minimize exposure to EMF fields from the cutting or gouging circuit 8 d 1 Route the torch and work cables together Secure them with tape when possible 8 d 2 Never coil the torch cable around your body 8 d 3 Do not place your body between the torch and work cables If the t
49. sitive operator reset Automatic detection of faulty output control In line coarse air filter Preflow Postflow timing Preflow is eliminated if arc is re initiated in Postflow Thermostatic Protection Solid state over current protection Works with pure nitrogen for cutting nonferrous materials Reconnectable for 230 VAC or 460 VAC inputs Quick disconnect torch Dead front display for machine status Unique electrode and Vortech nozzle design for optimum cooling and long life Swirl texture inside Vortech nozzle for better start ing reliability and higher quality cuts Unique drag cup design for durability and elimina tion of double arcing PRO CUT 55 LINCOLN ES OPERATION B 3 CUTTING CAPABILITY The PRO CUT 55 is rated at 55 amps at 50 duty cycle on a 10 minute basis or 40 amps at 100 duty cycle If the duty cycle is exceeded a thermal protector will shut off the output of the machine until it cools to the normal operating temperature Figure B 1 shows the cut capacity of the Pro Cut 55 when cutting mild steel The graph plots cut thickness vs torch travel speed with a torch standoff of 0 15 Example 0 25 material may be cut at a setting of 35 amps at an approximate speed of 38 IPM or at a setting of 45 amps at an approximate speed of 57 IPM or at a setting of 55 amps at an approximate speed of 62 IPM Lincoln s PRO CUT 55 Mild Steel Cut Capacity Chart 100
50. sure that the shield cup is hand tight Do not use pliers or over tighten Check the conditions of the inside of the nozzle If debris has collected rub the electrode on the inside bottom of the nozzle to remove any oxide layer that may have built up Refer to Suggestions for Extra Utility from the PRO CUT system Check the condition of the electrode If the end has a crater like appearance replace it along with the nozzle The maximum wear depth of the electrode is approximately 062 A green and erratic arc will indicate definite electrode failure and the electrode should be replaced immediately Replace the nozzle when the orifice exit is eroded away or oval shaped After the problem is found or if there is nothing apparently wrong reset the machine by pressing the Reset button It is possible for electrical noise to trip the safety circuit on rare occasions This should not be a regular occurrence If the machine does not reset or continues to trip consult the Troubleshooting Section Use the proper cutting or gouging procedures referred to in Procedure Recommendations PRO CUT 55 LINCOLN P B 6 OPERATION B 6 PILOT ARC DISCUSSION The PRO CUT has a smooth continuous pilot arc The pilot arc is only a means of transferring the arc to the workpiece for cutting Repeated pilot arc starts in rapid succession is not recommended as these starts will generally reduce consumable life Occasionally the pilot ar
51. t 3 16 Too long an arc may compromise cut quality and consumable life The nozzle should NOT be dragged on the work Use of the 522151 Drag Cup will maintain the proper standoff The only reason not to use the Drag Cup when the output control is set above mid range is in special tight corners Always hold at least a 1 8 standoff in those situations If piercing is required slowly lower the torch at an angle of about 30 to blow the dross away from the torch tip and slowly rotate the torch to a vertical position as the arc becomes deeper This process will blow a lot of molten metal and dross Be careful Blow the dross away from the torch the operator and any flammable objects Where possible start the cut from the edge of the work piece Keep moving A steady speed is necessary Do not pause Do not allow torch cable or body to contact hot surface PRO CUT 55 LINCOLN P B 7 Suggestions for Extra Utility from the PRO CUT System A WARNING E ELECTRIC SHOCK CAN KILL Turn off machine at the disconnect switch on the front of the machine before tightening cleaning or replacing consumables 1 Occasionally an oxide layer may form over the tip of the electrode creating an insulating barrier between the electrode and nozzle This will result in the tripping of the Pro Cut s safety circuit When this happens turn the power off remove the nozzle and electrode and use the electrode to rub against the inside bo
52. te Be und Entliiftung des Arbeitsplatzes Mantenha seu rosto da fumaca Use ventilac o e exhaust o para remover fumo da zona respirat ria Fat ie REE Eo ZE FR Es fE FR A sk HE BERE o e zzv 24758 else SUAS MAS sis PARAH 5215 Turn power off before servicing Desconectar el cable de ali mentaci n de poder de la m quina antes de iniciar cualquier servicio e D branchez le courant avant l entre tien Strom vor Wartungsarbeiten abschalten Netzstrom v llig ff nen Maschine anhalten opere com as tampas removidas Desligue a corrente antes de fazer servico toque as partes el tricas nuas e e AGS XA 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 e Mantenha se afastado das partes moventes opere com os paineis abertos ou guardas removidas
53. these recommended installation procedures may cause improper function of the Pro Cut or possibly even damage to the control system or power supply components PRO CUT 55 LINCOLN A 3 INSTALLATION A 3 INPUT ELECTRICAL CONNECTIONS Before installing the machine check that input supply voltage phase and frequency are the same as the machine s voltage phase and frequency as specified on the machine s rating plate a The Pro Cut 55 should be connected only by a qualified electrician Installation should be made in accordance with the U S National Electrical Code all local codes and the information detailed below b When received directly from the factory the machines are internally connected for 230 VAC Re connection will be necessary if a higher input voltage is used To reconnect the Pro Cut to 460 VAC or to connect back to 230 VAC follow the directions as outlined below Follow this procedure ONLY while the Pro Cut is disconnected from the input power and the capacitors have properly dis charged 1 Open the access door on the side of the machine 2 For 200 to 230 Position the large switch to 200 230 For 400 to 460 Position the large switch to 400 460 3 Move the A lead to the appropriate termi nal INPUT POWER CORD CONNECTOR INSTALLATION The Pro Cut 55 is supplied with one 11 48 AWG 3 lead input power cord already connected to the machine A cord connector provides a strain relief for the
54. ttom surface of the nozzle This will help remove any oxide buildup Replace the noz zle turn on the power and continue cutting If the Parts in Place circuit continues to trip after clean ing the consumables then replace them with a new set Do not continue to try and cut with exces sively worn consumables as this can cause dam age to the torch head and will degrade cut quality To improve consumable life here are some sug gestions that may be useful a Never drag the nozzle on the work surface if the output control knob is above the mid range setting b Make sure the air supply to the Pro Cut is clean and free of oil Use several extra in line filters if necessary c Use the lowest output setting possible to make a good quality cut at the desired cut speed d Minimize dross buildup on the nozzle tip by starting the cut from the edge of the plate when possible e Pierce cutting should be done only when nec essary If piercing angle torch about 30 from the plane perpendicular to the work piece transfer the arc then bring the torch perpen dicular to the work and begin parallel move ment f Reduce the number of pilot arc starts without transferring to the work g Reduce the pilot arc time before transferring to the work PRO CUT 55 LINCOLN P OPERATION B 7 h Set air pressure to recommended setting A higher or lower pressure will cause turbulence in the plasma arc eroding the orifice of the
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