model h & hx butt welders
Contents
1. safety precautions This electrical trouble shooting table is furnished as a suggested method of trouble shooting the welder The individual steps of the table should be performed in the order given to make the tests valid The electrical schematic section 10 furnished for these tests show the table test points The table may be used for welders with a different but closely related wiring by using corresponding test points During all tests line voltage should be connected to L1 amp L2 of the welder The heat switch should be set to the 1 position 14 9 1 2 FINAL ELECTRICAL CHECKS Set the heat switch to the number 1 position voltmeter across the welding dies connect the Press the operating switch The meter reading will typically be less than 10 VAC Consult the weld specification sheet for this value Rotate the heat switch through all settings If the voltage is not read at any setting the heat switch may be defective Actuate the weld limit switch observe the reading goes to zero Release the weld limit and operating switches the reading should remain at zero 9 1 3 PROBLEM PRESS WELD LIMIT PRESS TEST LEAD METER IF NO OPERATING SWITCH ANNEAL CONNECTION READING READING SWITCH ACCTUATED SWITCH X1 X2 5 VAC Bad control transformer 1 X2 FUl 52. inder diap Hose fitti Steel washers spring movable Switch scal mount bolt ationary mov head Screw degrees straight top bolt top nut nder 20 haft protecting boot hragm 20 ng brass nsulating plate at Head head upset frame Upset frame mount screws Open head stop bolt amp nut Open space scale Scale mount screws Limit switch roller type Limit switch cover Limit switch mount screws Limit switch actuator nut Actuator nut locknut Insulating washers amp tubes upset frame ITEM 31054 31055 31056 23 PARTS LIST H HX SERIES BUTT WELDERS MODEL PART NO DESCRIPTION H 42 Cylinder shaft boot 12 H 43 Rotochamber 12 upset H 44 Cylinder diaphragm 12 H 46 Weld transformer state voltage amp S N H 47 Transformer primary coil state voltage amp S N H 48 Transformer secondary state voltage amp S N H 49 Transformer support strap H 50 Transformer ring H 51 34 transformer stud H 52 transformer stud H 55 Upset cylinder mount plate H 57 Die mount bolt H 58 V groove dies copper H 58R Radius groove die set H 59 Shoe mount washers H 60 Shoe set w inserts 601 Steel shoe left H 60R Steel shoe r
3. lt OPEN HEAD SPACE ADJUST SCREW WITH HEAD OPEN ADJUST B CLOSED HEAD SPACE C LIMIT SWITCH ING SCREW APPROXIMATELY 1 TO 2 ADJUST WITH HEAD STOP SCREW 5 Ye TIMES DIA OF ROD 020 MINIMUM 416 Yaz 8 1 PINCH CUT SHEAR EXAMPLE 8 DOE SHEAR BLADE PLACE IN DIE GROOVES AS ILLUSTRATED CROSSING CUT ENDS NOTE A A DESIGNATION INDICATES POSITION OF FRAYING SURFACES FOR OPTIMUM WELD ALIGNMENT WELD HEAT AND UPSET PRESSURE UTILIZATION EXAMPLES OF GOOD WELDS LIT LEA A GOOD WELD WITH CORRECT AGOOD WELD WILL BREAK ACROSS BURR AND EVEN HEAT WELD ONA BEND TEST PENETRATION RECOMMENDED SHEAR CUTS FOR WELDERS EXAMPLES OF POOR WELDS CE 11223 A POOR WELD WITH IMPROPER POOR WELD WITH LITTLE UPSET AND A MINIMUM FUSION AND NO UPSET BUAR AMOUNT OF HEAT PENETRATION BURR REMOVAL EXAMPLES GOOD Weld burr must be removed as close to parent metal as possible Incom plete burr removal or excessive grinding will cause tension breaks on subsequent wire drawing operations Bend test The weld burr should be the diameter of the rod above vise jaws and bent back forth until rod breaks A good weld will break across or on either side of the weld 13 9 0 DIAGNOSTIC CHART FOR TROUBLE SHOOTING WELDING ACTION CAUSE REMEDY Weld action normal but weld burr doesn t extend beyond wire Lack of spacing ncrease starting space until desired burr is obtained Molten
4. For 460 Vac operation use solid jumper as shown for 230 Vac operation use dashed jumpers as shown B3560B 1 0 DESCRIPTION A DRAIN amp REGULATOR WITH GUAGE LOCKDOWN FOOT PEDAL FLOW CONTROL VALVE D AIR CLAMP CYLINDERS HAND VALVE WITH SPRING RETURN F AIR UPSET CYLINDER NORMAL WORKING RANGE 50 80 PSI ADJUSTABLE RANGE 0 100 PSI AIR INPUT NORMAL WORKING RANGE 20 35 PSI ADJUSTABLE RANGE 0 100 PSI 16 11 0 SAFETY REMINDERS The following accident prevention information is presented to eliminate potential hazards while operating or repairing Micro Wel inspecting d electric resistance welding equipment Important safety compliance information for Micro Weld Welders GENERAL 1 Qualified personnel prior to using equipment must instruct an operator on basic operation and malfunction methods 2 Safety eyeglasses must be worn by all personnel operating or servicing welders 3 Use safety equipment properly and keep safety equipment on welders 1 Determine that both operating voltages and hertz cycles of power supply correspond to ratings listed on welder nameplate located on welder housing 5 Check nameplate ratings and keep within capacities and material categories stated therein
5. 6 Adjustments or repairs must be made by persons thoroughly familiar with operating principles of welder 7 Welder must be disconnected from power supply prior to maintenance or repair procedures ELECTRICAL 1 Refer to National Electrical Code and local regulations for adequate electrical wiring to power welder Do not operate welder with inadequate electrical power supply cords or cable 2 All welders must be grounded through power supply and welder ground connection terminal securely tightened 3 All welders must be able to be disconnected from power source either by a double breaking disconnect switch or unplugged by standard rated plugs 4 All welders must be fused to prevent injury should an electrical malfunction occur Welders must never be fused for an ampere load that exceeds the ratings stated on welder nameplate Normally welders are fused using the nameplate rated load time lag parameters functional to standard fuses allow this specification 5 Electric power cords to welder must be kept in good condition Report any damage or potential hazards to maintenance personnel 6 The weld heat selection switch potentiometer or range selection devices must not be changed to a new position while a weld operation is in process 17 12 0 BUYERS GUIDE HOW TO ORDER PARTS You must provide 1 Machine Model 2 Machine Serial Number 3 Voltage Then identify part s on part list last page in book and provide
6. MICRO with the circled number CALL MICRO at 800 872 1068 OR FAX MICRO at 630 787 9360 Provide MICRO with your company name and purchase order number 18 13 0 PARTS LIST 13 0 PARTS LIST 9 2 o u 2 o d r m 9 2 o u o z d ul m a z 4 I 7 4 o z SHEAR 40 19 N 20 21 22 PARTS LIST H HX SERIES BUTT WELDERS MODEL PART NO H 01A H 01B H 03 H 03A H 03B H 04 H 05 H 06 H 07 H 08L H 08R 09 H 10 p npn p P p 1 CO DESCRIPTION Complete head assembly lash guard assembly guard mount screw guard switch shield shield mount screw Basic head match machined Outer clamp arm pin washer Inner cl arm arm arm pivot arm pin bolt left right Stat pin arm pin screw Head mount bolt re Head mount bolt fro Head mount bolt fro Secondary mount bolts mo Secondary mount bolts st Secondary clamp plate st Head re End plate Limit End plate Grease fit Grease fit Od C curn amp arm pin washer ar nt left nt right vable ting 90 losed losed C lamp cyli Cylinder s head st head st ting
7. assembly ITEM 78111 60022 60004 60005 90262 78204 62085 90509 62096 90258 62085 62020 90258 77862 57601 58119 59523 59511 25
8. be open this will allow testing of water mperature During operation flow should be adjusted so that output feels warm to hand This will minimize condensation The hand knob at right hand end of truck adjusts the space between the clamping jaws of dies end of See setting chart at instructions for approximate burn off settings Operating switch is located in aluminum housing at of the welder truck plunger extending down Clamp arms are air operated Caution hands are clear o valves Sequence of operation 1 Set weld heat and die spacing per chart 2 Clamp stock in jaws 3 Press and hold operati melts and is blown away Some cables have filler cord with an asphalt and run into the jaw Note impregnation The asphalt grooves Jaw grooves must the end Switch is located at top with switch The foot operated valves are located at the bottom of welder housing Care must be used when clamping stock be sure clamping di s before operating foot ng switch will melt t be kept clean also the connection between the jaw and jaw seat so that good electrical connection maintained till stock between jaws Stranded Material Clamp Size Heat Space Pressure 5 8 diameter 6 or 7 1 8 to 1 4 80 PSI 3 8 dia
9. flash build up causes terial and shorting of die sets to clamp material that is not suited for to die sets Undersize materials will slip and oversize materials will overstress not use welding die sets for a vise These parts will tand the mechanical abuse ding dies are replaced clean bottoms of dies and corresponding die seats to a bright and clean condition before bolting surface will i them tightly into place An oxidized insulate the welding dies and reduc ffectiv welding voltage 5 Welding die set will wear with use and must be changed occasionally for good welding results Keep and adequate supply of replacement parts available ire and rod slippage is a probl cause of wire breaks lem caused by poor die sets and a major 12 8 0 SUGGESTED SETT INGS ROD WELD A B H X SIZE PRESSURE HEAD HEAD LIMIT WELD WELD z OPEN _ CLOSED SWITCH HEAT HEAT 125 1565 1 020 5 98 187 20165 2 5 _ 8 250 25165 2 5 6 Z TE _ 25165 ____ _ 020 5 5 6 _ 375 30 Ibs 3 020 5 4or3 L 9 500 40165 3 020 4 2 _ 4 625 40lbs 020 0 4 _ 1 3 750 50 5 4 020 4 2 Note All settings are approximate and further adjustments may be necessary 14 i iit Fg H its ttt i EE Li gt A gt gt
10. line with no Oo is a 020 space between the inside of t There is an increase of 1 4 spacing betw inter on the n the scale each graduation on the scale The closed head stop bolt and locking jam in the movable head endplate in line wit adjusting bolt The closed space stop s ns on the scale There he welding dies n the dies for nut are located h the open space hould be adjusted so that there is never less than 020 spacing between the dies The minimum 020 spacing must be maintained as an electrical safety feature otherwise damage will occur to the machine LIMIT SWITCH The weld limit switch controls the cut o by moving the switch initiating barrel ff point of current flow to the welding dies Limit switch adjustment is made along the threaded S section 8 for stud mounted in the movable headpiece suggested settings WELDING DIES The welding dies lower and upper die shoes purposes 1 to carry current for weldi two ends of stock and 3 to prevent mat during a weld cycle Small rod is placed in the smal the bigger grooves grooves and the larger rod is placed in THE OPERATING LEVER serve three ng 2 to al terial slippage lign Ller The welder operating lever is located at the top of the regulator housing located on the right end of the welde
11. metal is blown out and ends not joined Weld heat too high Lower heat settings Stock is too small Check size rating of welder Low upset pressure Adjust upset air regulator Weld has complete burr but Upset pressure too great Lower upset pressure is dry and breaks off below High carbon steel wire Carbon steel wire often surface of wire appears like this process wire by annealing weld before removing burr Welds good but poorly Welding dies amp die shoes Replace worn dies and shoes aligned Starting space Decrease starting space Loose head shafts Return heads to factory Ends of wire buckle and may not weld Upset pressure too great Decrease upset pressure Low weld heat Increase weld heat Varying weld results Stock slipping Increase clamp air pressure Varying weld voltages Check electric lines Clean and tighten transformer connections to heads Rod condition variations Clean rod where clamped in dies Dies and die shoes Replace die shoes Flashings Clean build up of flash materials xercised when making present in the welder 9 1 ELECTRICAL TROUBLE SHOOTING OF WELDER Caution Extreme care should b these tests Dangerous voltages ar Only persons familiar with electrical should perform these tests 9 1 1 TROUBLE SHOOTING TABLE See section 9 1 3
12. F CLAMP ARM G FLASHGUARD SAFETY SWITCH H FLASHGUARD I WELD LIMIT SWITCH ADJUSTING NUTS J UPSET CYLINDER K HEAD OPEN SPACE ADJUSTING BOLT L OPERATING SWITCH HANDLE M UPSET PRESSURE REGULATOR WITH GAUGE N CLAMP PRESSURE REGULATOR WITH GAUGE O HEAD CLOSED SPACE ADJUST ING BOLT P OPEN SPACE SCALE Q CLAMP FOOT PEDALS TYPICAL OPERATING SEQUENCE All insulating materials must be removed from conductors where they contact lower welding dies Set weld heat selection switch to recommended chart setting Set upset pressure to recommended chart setting PSI Adjust the head open space to proper chart setting Place the stock into welding dies so wire ends meet midway between each die Clamp into position with foot valve pedals Lower the flash guard and raise up on the operating lever until it initiates the operation switch hold for 1 to 3 seconds to assure a complete weld cycle Unclamp welded conductors E Trim of material diameter of the weld area wil weld burr so welded area is equal to parent Incomplete burr removal or undercutting 1 result in subsequent weld breaks Typical anneal opera the anneal clamps wi ting th the weld midway between the clamps g The stock should be clamped in lever and press the weld anneal Reach above the operatin switch only The switch allow the heat to spread o 5 to th
13. MICRO WELD MODEL H amp HX BUTT WELDERS MICRO PRODUCTS COMPANY SERVICE MANUAL TABLE OF CONTENTS SPECIFICATIONS GENERAL OPERATING INSTRUCTIONS BASIC OPERATING PARTS BASIC OPERATING PARTS LOCATION TYPICAL OPERATING SEQUENCE 1 OE Por O O lt gt O Oi sO CX SPECIAL ADJUSTMENTS PREVENTIVE MAINTENACE SUGGESTED SETTINGS DIAGNOISTIC CHART FOR TROULBE SHOOTING 10 0 ELECTRICAL SCHEMATIC 11 0 SAFETY REMINDERS 12 0 BUYERS GUIDE 13 0 PARTS LIST 1 0 SPECIFICATIONS MODEL H MODEL HX Type of Welding Process Butt Weld Butt Weld Welding Range 2 125 EO 625 125 to 750 Material Suitability Steel Rod Steel Rod Standard Operating Voltages 460 230 Volts 460 230 Volts Maximum Line Demand 460 Volt 25amps 100 duty cycle 79amps 10 duty cycle 42 amps 100 duty cycle 133 amps 10 duty cycle Maximum Line Demand 230 Volt 50amps 100 duty cycle 158amps 10 duty cycle 84 amps 100 duty cycle 266 amps 10 duty cycle Single Phase AC Transformer 16 KVA 50 duty cycle 27 KVA 50 duty cycle Clamp Method Pneumatic Foot Controlled Pneumatic Foot Controlled Upset Method Pneumatic Adjustable Pneumatic Adjustable Mounting 4 Caster Wheels 4 Caster Wh
14. VAC Bad fuse connection X2 FU1 2 5 VAC Open fuse Open wire to operating X2 LS1 5 VAC switch Ez 181 2 5 VAC Bad operating switch x Open wire to flash guard X2 LS2 5 VAC switch X X2 LS2 2 5 VAC Open flash guard switch X Open wire to weld limit X2 LS3 5 VAC switch X X2 LS3 2 5 VAC Bad weld limit switch X L2 CR1 Line voltage Open wiring to contactor L2 CR1 2 Line voltage Bad contactor X Li 81 1 Line voltage Open wire to head switch X NOTE To perform repair consult section 13 for parts identification 15 10 0 ELECTRICAL SCHEMATIC WELD TRANSFORMER ul 460 230V HEAT CONTROL AUTO TAANSFORMER T3 Ls2 LIMIT SW WELD WELD amp ANNEAL CONTACTOR FLASH GUARD OPERATING SW SAFETY SW NOTE A UNLESS OTHERWISE SPECIFIED ALL 120V CONTROL WIRES TO BE NO I6 AWG RED NOTE B UNLESS OTHERWISE SPECIFIED ALL NEUTRAL WIRES BE NO I6 AWG WHITE NOTE C WHERE POSSIBLE USE ORANGE WIRE ON HIGH VOLTAGE WIRING ABOVE 200 V NOTE D 460VAC OPERATION USE SOLID JUMPER AS SHOWN 230 VAC OPERATION USE DASHED JUMPERS AS SHOWN B3559B WELD TRANSFORMER LI 460 230 115V LSI LS 2 FLASHGUARD LIMIT SAFETY SW SWITCH WELD WELD SW amp I CONTACTOR ANNEAL SW Note A Unless otherwise specified all 110V control wires to be no 16 Awg red Note B Unless otherwise specified all neutral wires to be no 16 Awg white Note C Where possible use orange wire on high voltage wiring above 200V Note D
15. e obtained by using rating te power sizes der m l nol Code and local ust be of sufficient no appreciable loss operate properly if he line vol ha slow blow fuse The minimum power cable size this same current tage In electrical The welding voltages at the welding dies will they do not exceed 10 cable to welder in good repair tions securely tightened to new position while a weld Disconnect electrical disconnect methods to the welding machine are hould the power cords be damaged or not volts Welder Heat service befor serving welder high voltages are located within the base of the welder 2 2 2 MECHANICAL Operator while using wel all safety guards on wel must wear safety glasses lders and use properly Keep Operators must be instructed on basic operation of unit to prevent injury Size range for each welder Check nameplate rating and keep within material WATER HOOK UP If so equipped It is important that if xtended period of time e connected to the wel utlet provided at the hould be installed in utlet should run to an a welder is to be operated for an and heads heat up water lines must der Connect hoses to inlet and back of the welder Shut off valve the inlet line and the hose from the open sight drain Water should be e b 5 E ur
16. e proper anneal hould be jogged on and off to ut in the stock Heat the stock rature and allow to cool to where emoving the weld burr The carbon steel 1008 1 the critical point which 018 degrees F and mild to high carbon steel 1018 1090 at temp there is no color before r temperature required for a V S nnealing should be slightly above aries for different steels Low hould be annealed at about 1650 about 1400 degrees to 1500 degrees F This temperature should be maintained just long enough to heat the weld zone evenly DEGREES FARENGIHT TEMPERATURE BY COLOR 750 degrees Red heat visible in the darkness 975 degrees Red heat visible in the daylight 1290 degrees Dark red 1470 degrees Dull cherry red 1650 degrees Cherry red 1830 degrees Bright cherry red too hot Note The critical temperature is quickly identified by the loss of the steel s magnetic properties SPECIAL ADJUSTMENTS Model HX Refer to section 8 0 for approximate settings WELD HEAT SELECTION The weld heat selection switch is set simply by rotating the handle with pointer to the number of heat required to make a good weld HEAD SPACING The closed head stop once set should never need changing This set to keep the weld dies from hitting each other when upset is activated without stock being clamped in the dies To mak
17. e this adjustment turn the air upset regulator to 10 PSI with the flash guard in the up position lift up on the upset lever to move movable headpiece now check space between dies the space should be 020 then loosen the locknut on the closed stop bolt and adjust until the space is correct Now retighten the locknut After adjusting the closed space the open space can be adjusted to the proper setting for the stock to be welded Use the open space scale when referring to actual setting LIMIT SWITCH Loosening the lock nut then turning the tapered adjusting nut to the correct setting makes the limit switch adjustment Clockwise will turn current off earlier counterclockwise will turn the current off later This setting can be used to lessen the amount of weld burr By adjusting the limit switch to lessen the weld burr decreased weld quality could result MODEL HX BURN OFF INSTRUCTIONS If unit is water cooled and rate of burn off is high unit will require the water cooling to prevent overheating of the dies and headpiece Connect the input line to one end of water cool circuit This input line should have a shutoff valve so that water supply can be cut off when not in operation This will present condensation on headpiece which could cause transformer burn out Water output hose should
18. eels Dimensions and Weights Height Overall 46 Truck Floor or Bench space 39 x 29 Truck Type Welding Die Height 41 Truck Type Weight 560 LBS Truck Type FEATURES e Micro Weld quality and workmanship Heavy duty construction amp components e East to operate controls e Low maintenance costs e Easy to set welding parameters Safety electrical switch circuits Heavy duty weld heat selection switch e Sensitive straight slide movable headpiece assembly First plant housing size of Electrical determine that corresponds to GENERAL OPERATING INSTRUCIONS ELECTRICAL HOOK UP INSTRUCTIONS available elect trical the nameplate rati service in your ng located on welder the 100 LO Refer regulations for adequa to National to deliver full during weld cycle there is more general Electrical wiring to wel ampere load with The welder wil than a 10 E and fusing guidelines Remember line voltages potentially dangerous s severed harm an operator since SAFETY PRECAUTIONS See section 11 0 2 2 1 ELECTRICAL Mal ntain electrical mus Swi le is in process t be grounded and connect tch must not be changed variation in t the welder should be fused wit duty cycle rating the welder can b
19. ight H 61 Set of inserts 4 pcs 611 Steel insert for left shoe H 61R Steel insert for right shoe 615 Steel insert straight H 62 Insert mount screw HX 68 Auto transformer HX 68A Primary coil auto transformer H 70 6 pt Heat switch H 71 Heat switch mount bolts H 72 Weld contactor 440V H amp HX 72 Weld contactor 240V HX 72 Weld contactor 240V H 72A Contactor repair kit H 74 Terminal block H 75 Terminal block mount screws HX 76 12 point heat switch HX 77 Weld transformer 2 tap HX 78 2 tap primary HX 79 Secondary H 80 Complete truck H 81 Swivel caster H 82W Wheel only H 85 Truck door HX 97 Foot pedal muffler 98 Foot pedal H 104 4 shear H 109 Vise standard ITEM 77715 77700 77708 51008 24 PARTS LIST H HX SERIES BUTT WELDERS MODEL PART NO DESCRIPTION HX 109A Heavy duty vise H 110 Vise bracket HX 110 Vise bracket HX 110A Heavy duty vise bracket H 111 Vise mount bolt H 114 4 shear blades H 115 Anneal bracket CA H 116 Anneal bracket mount screw H 117 CA anneal clamps pair H 118 Anneal mount bolts CA H 119 Anneal bracket CAL H 120 CAL anneal clamps pair H 122 Anneal mount bolts CAL H 123 Clamp arm flow control valve H 125 Control step down H 125A Fuse block H 126 Heavy duty step down H A19 Complete air frame
20. l worn or broken ten contact with soft wear and replace if necessary Clean weld die bottoms to remove oxides with emery cloth urface 4 Clean die seats with emery cloth to brigh areas clean Ct f 6 Completely tighten dies into seats to assure a good 7 Worn die shoes will not hold stock during a weld cycle QUARTERLY lRepeat above service items 2 Check grease requirements on clamp arms pivot shafts and 4 Check contacts on magnetic contactor for worn contacts Servicing welder in 5 Clean heat switch contacts with low residue cleaner and recoat with petroleum jelly ANNUALLY lRepeat previously noted items 2 Check for wear in clap arm pivots 3Clean inside and outside of welder 4 Check grease requirements on headpiece slide shafts grease lightly 5 Caution make sure that power supply is disconnected befor anyway 11 WELDING DIES AND DIE SHOES INFORMATION Description Velding dies Lower conducting electrode and clamp jaw Velding die shoes Upper clamping member ve lding dies and die shoes in poor condition are the main causes of bad welds Care of die sets 1 Use a brass or that build up o die burns on ma 2 Do welder int burn clam 3 Do not at tempt die grooves ping parts not withs 4 When ever wel fiber blade to remove particles of flashings n die sets Excessive
21. meter 9 1 8 80 PSI 5 16 diameter 9 1 8 80 PSI 1 4 diameter 9 1787 80 PSI No bet tween dies and stock Use wire brush to remove zinc oxides and beads from shoe grooves Because of thick zinc coating this cleaning of grooves should be done often to allow good electrical contact die and 10 Ww w w bbe BD SL 1 1Welding dies and die shoes in poor condition are the N N 2 Check die sets for 2 Chec 3 Chec 4 Drai PREVENTIVE MAINTENANCE TECHNIQUE Keep in Mind that many years They are designed to be as a these welders are precision built to last but will require good maintenance procedures utomatic as possible with a minimum dependence on the ability of the operator Adjustments must be the operating principles of made by those thoroughly familiar with the welders WELDING DIE NOTES primary caused of bad welds placed on a flat s 5 After cleaning of dies be sure to wipe off xcessiv cloth contact change steel faces or replace complete shoes WEEKLY k for k for n airl air leaks ine fi 1 Tighten all loose parts water leaks if applicable lter bowls 5 Tighten all loose parts lubrication points Check anneal parts an assemblies d replace al
22. ned off when the wel AIR HOOK UP Set air regulators for der is not in use form 20 to 80 lbs A safety pop off valve will be activated lbs WELDING DIES The dies and shoes supp most size and material when air gauge is set for over 100 lied with the welder will handle types within the range of the welder For new weld applications consult the factory for special die and shoe se BASIC OPERATING PARTS LS WELD HEAT SELECTION SWITCH Welding heat is selected by means of a heavy duty tap switch either six 6 or twelve 12 steps of voltage The switch is located conveniently on the lower front of the welder Number one 1 indicates high heat number six 6 or twelve 12 indicates low welding heat Other numbers are equally graduated from high to low to allow just the right amount of voltage for the weld operation The model H has a six 6 point heat switch and the Model HX has a twelve 12 point heat switch 22 2 1 HEAD SPACING MECHANISM The open head space adjustment bolt and located on the upset cylinder mounting plate to the immediate left front of the upset cylinder locking jam nut are The open space scale also located on the front of the upset cylinder determining the mounting is quick reference guide for ount of open space by lining up the po movable head endplate with the graduatio en the pointer is in
23. r truck Keep hands away from clamp arms operating the lever The lever must b and headpiec when depressed th entire ay when welding The first part of the lever movement allows the air from the top regulator to pass to the ends of the stock to be welded At operating lever movement the lever init Switch which starts the weld the air upset cylinder This makes firm contact between the bottom of the iates the weld CLAMP ARMS The clamp arms are air operated The foot controlled air valves are used to initiate the air clamp cylinders The foot valves are located at the bottom of the welder housing The right foot pedal operates the right clamp arm and the left pedal operates the left clamp arm To clamp stock place it in the proper welding die groove and press the top edges of the tilt pedal on foot valve To release stock press on bottom edge of foot valve tilt pedal Caution care must be used when clamping stock be sure hands are clear of clamp arms ANNEAL SWITCH The anneal switch is located directly above operating lever it is also known as the weld switch When annealing make sure to depress the anneal switch only See typical anneal sequence 4 0 BASIC OPERATING PARTS LOCATION A HEAT SELECTION SWITCH B FLASH CLEAN OUT C WELD DIES D WELD SHOES E CLAMP CYLINDER
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