HP-1 Manual - Micro Products Company
Contents
1. MODEL PART NO DESCRIPTION ITEM HP 01A Head assembly stationary amp movable casting w shafts match machined state serial number 31051 HP 01B Complete headpiece w all parts 31059 HP O2A Bearing headpiece replacement 48402 HP 04 Protection sleeve slide shafts 31014 HP 05 Screw sleeve mounting 90821 HP 06 Vasher clamp arm pin outer 31546 HP 07 Vasher clamp arm pin inner 31006 HP 08L Clamp arm left 31017 HP O8R Clamp arm right 31030 HP 09 Clamp arm pivot pins 31000 HP 10 Bolt clamp arm pin outer 90632 HP 11 Bolt clamp arm pin inner 90835 HP 15 Bolt transformer secondary strap movable 90509 head HP 16 Bolt transformer secondary strap stationary head 90659 HP 17 End plate transformer secondary strap stationary head 51000 HP 18 Return spring headpiece 80014 HP 19 End plate assembly movable 41068 HP 19A Limit switch scale screw 31009 HP 20 End plate mounting screw 90260 HP 21 Grease fitting stationary head bent 48422 HP 23 Closed head stop button 31012 HP 24 Clamp cylinder typ 20 complete 77703 HP 25 Boot shaft protecting typ 20 BETIS HP 26 Diaphragm type 20 77710 HP 30 Insulation upset frame 41011 HP 31 Insulating washers amp tube set 3102. WELD HEAD LIMIT HEAT OPEN SWITCH AIR AIR SIZE MATERIAL SETTING SPACE SETTING UPSET CLAMP 8 GA Copper 10 4 1 4 4 1 4 20 PS 60 PS 6 GA Copper 9 4 4 20 PS 60 PS 4 GA Copper 8 4 4 20 PS 60 PS 3 GA Copper 8 4 4 25 PS 60 PS 2 GA Copper 8 4 4 25 PS 60 PS 1 GA Copper 7 4 1 4 4 1 4 25 PS 60 PS 1 0 Copper 7 4 1 4 4 1 4 30 PS 60 PS 2 0 Copper 4 1 4 4 1 4 40 PS 60 PS 3 0 Copper 6 4 3 4 4 3 4 45 PS 60 PS 4 0 Copper 6 4 4 50 PS 60 PS 8 GA Aluminum 12 4 1 4 4 1 4 15 PS 60 PS 6 GA Aluminum 11 4 1 4 4 1 4 15 PS 60 PS 4 GA Aluminum 10 4 1 4 4 1 4 15 PS 60 PS 3 GA Aluminum 10 4 4 1 4 20 PS 60 PS 2 GA Aluminum 10 or 9 4 4 20 PS 60 PS 1 GA Aluminum 9 4 4 1 4 25 PS 60 PS 1 0 Aluminum 9 4 4 25 PS 60 PS 2 0 Aluminum 9 4 4 30 PS 60 PS 3 0 Aluminum 8 4 1 4 4 1 4 35 PS 60 PS 4 0 Aluminum 8 or 7 4 1 4 4 1 4 40 PS 60 PS NOTE These settings are approximate and may be varied to obtain the best weld WELDED STRAND OR BUNCHED COPPER AND ALUMINUM WIRE CONDUCTORS Theory Welds are formed within a ceramic tube or block and no filler materials are needed Wire ends are resistance hot forged together The resultant ts into a sol crucible Single fil normal we ament conductors have configuration the plastic mat ld withi ves tool weld burr common with is not suitable heated to a plastic co
3. 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 FINAL ELECTRICAL CHECKS Set the heat switch to the number 1 position Press the operating typically be less than 10 connect the heet for this value voltmeter across the welding dies switch The meter reading will VAC Consult the weld specification s Rotate the heat switch through all set voltage is not read at any setting th defective Actuate the weld limit swi reading goes to zero Release th switches the reading should remain at tings If the e heat switch may be tch observe the weld limit and operating Zero 14 9 1 3 WELD TEST PROBLEM PRESS LIMIT PRESS LEAD METER IF NO OPERATING SWITCH ANNEAL CONNECTION READING READING SWITCH ACTUATED SWITCH X1 X2 5 VAC Bad control transformer T1 X2 FUL1 5 VAC Bad fuse connection X
4. MODEL PART NO DESCRIPTION ITEM SS 900 Complete weld tool w holder 2 3 or 4 match state size 31064 SS 901 Insert only weld tool 2 3 or 4 grooves state size 31035 SS 902 Insert only weld tool blank 31034 SS 903 Holder only welding tool 31045
5. DIE NOTES primary caused of bad welds 2 Check die sets 3 Clean weld die placed ona 4 Clean die seats wit Tor xcessiv flat GLoth contact those thoroughly familiar with the welders wear and replace if necessary bottoms to remove oxides with emery cloth surface th emery cloth to brighten contact 5 After cleaning of dies be sure to wipe off with soft areas clean Cr a 6 Completely tighten dies into seats to assure a good 7Worn die shoes will not hold stock during a weld cycle change steel faces or replace complete shoes WEEKLY QUARTERLY 1 Repeat abov 2 Check greas servic 1 Tighten all loose parts items requirem nts on clan lubrication 3 Check annea assemblies 4 Check conta points 1 parts an CES xO recoat with ANNUALLY switch con petroleum d replace al np arms pivot shafts and 1 worn or broken n magnetic contactor for worn contacts tacts with low residu cleaner and jelly 1 Repeat previously noted items 2 Check for wear in clap arm pivots 3 Clean inside and out 4 Check greas requir lightly ma ke sure servicing welder in anyway tside of welder ments on headpiece slide shafts grease that power supply is disconnected befor WELDING DIES AND DIE SHOES INFORMATION Description Veld
6. LBS Truck Type FEATURES OF MICRO WELD CERAMIC FUSION WELDING EQUIPMENT e Micro Weld quality and workmanship e Heavy duty construction amp components e East to operate controls e Low maintenance costs e Easy to set welding parameters e Safety electrical switch circuits e Heavy duty weld heat selection switch vo e No upset burr formation during weld process all strands locked into weld coalescence e Sensitive straight slide movable headpiece assembly equipped with ball bearings 2 0 GENERAL OPERATING INSTRUCIONS 2 1 ELECTRICAL HOOK UP INSTRUCTIONS First determine that available electrical service in your plant corresponds to the nameplate rating located on welder housing Electrical wiring to welder must be of sufficient size to deliver full ampere load with no appreciable loss during weld cycle The welder will not operate properly if there is more than a 10 variation in the line voltage In general the welder should be fused with a slow blow fuse of the 100 duty cycle rating The minimum power cable size to the welder can be obtained by using this same current rating Refer to National Electrical Code and local electrical regulations for adequate power sizes disconnect methods and fusing guidelines Remember line voltages to the welding machine are poten
7. 2 FU1 2 5 VAC Open fuse X2 LS1 5 VAC Open wire to operating switch X2 LS1 2 5 VAC Bad operating switch x X2 LS2 5 VAC Open wire to flashguard switch X X2 LS2 2 5 VAC Open flashguard switch x X2 LS3 5 VAC Open wire to weld limit 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 EL Sl1 1 Line voltage Open wire to heat switch X NOTE To perform repair consult section 13 for parts identification 15 10 0 ELECTRICAL SCHEMATIC 10 0 ELECTRICAL SCHEMATIC 12 WELD TRANSFORMER LI 460 230V L2 HEAT CONTROL AUTO TRANSFORMER XI SV X2 73 LSI Ls2 OL 2 I 2 LIMIT sw WELD WELD amp ANNEAL oe CONTACTOR FLASHGUARD 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 TO BE NO I6 AWG WHITE NOTE C WHERE POSSIBLE USE ORANGE WIRE ON HIGH VOLTAGE WIRING ABOVE 200V NOTE D 460VAC OPERATION USE SOLID JUMPER AS SHOWN FOR 230 VAC OPERATION USE DASHED JUMPERS AS SHOWN B3559B 1 0 DESCRIPTION A DRAIN amp REGULATOR WITH GUAGE B LOCKDOWN FOOT PEDAL C FLOW CONTROL VALVE D AIR CLAMP CYLINDERS E HAND VALVE WITH SPRING RETURN F AIR UPSET CYLINDER NORMAL WORKING RANGE 60 90 PSI ADJUSTABLE RANGE 0 100 PSI NOTE ALL FITTINGS ARE AIR INPUT NET NORMAL WORKING RANGE 20 35 PSI ADJUSTABLE RANGE 0 100 PSI 16 11 0 SAFETY REM
8. 60R Steel die shoe right 31002 HP 61 Complete set of inserts 31052 HP 61L Steel insert left 31004 HP 61R Steel insert right 31005 HP 61S Straight steel insert 31003 HP 62 Insert mount screw 90704 HP 68 Auto transformer used w 12 point tap switch 51019 HP 68P Auto transformer primary 51018 HP 72 Veld contactor 460 volt 57610 HP 72 Veld contactor 230 volt 57611 HP 72A Repair kit contactor 57631 HP 74 Terminal block power input 53000 HP 75 Terminal block mounting screw 90205 HP 76 Veld heat selection switch 12 point 56547 HP 77 Veld transformer 2 tap primary state voltage and serial number 51027 HP 78P Replacement primary coil 2 tap 53047 HP 78S Veld transformer secondary 51026 HP 79 Shunt support bracket 51004 HP 80 Shunt support bracket 51004 HP 81 Swivel caster 48108 HP 82 Stationary caster 48117 HP 82W Replacement wheel only Special HP 85 Door 41014 HP 97 Foot pedal muffler 77892 HP 98 Foot valve complete 90611 HP 99 Foot valve mounting screw 9061 HP 109 Vise standard 78112 HP 110 Mounting bracket standard vise 60022 HP 111 Bolt amp nut vise mounting 90261 HP 123 Flow control valve clamp arm 77862 HP 124 Safety flashguard 31056 HP 124A Bolts flashguard attaching 90232 HP 124B Flashguard switch 57813 HP 125 Control transformer switch circuits 57601 HP 125A Fuse control transformer 58100 22 PARTS LIST HP WELDER
9. 69 HP 32 Steel washers 92751 HP 33 Upset frame mounting screw 90260 HP 34 Bolt amp nut head adjusting open 90302 HP 35 Scale open head positioning 41005 HP 36 Scale mounting screw 91048 HP 37A Limit switch roller activated 57811 HP 37B Limit switch magnetic proximity 77819 HP 37C Cover limit switch roller type 51001 HP 41 Actuator limit switch cut off 31008 HP 41A Limit switch actuator locknut 31007 HP 43A Clevis upset cylinder 77812 HP 45 Upset cylinder 77812 HP 45A Clevis Application HP 53A Protection plate transformer 41012 HP 53B Protection plate riser 41009 HP 55 Upset cylinder mounting plate 41010 HP 57 Welding die attaching screw lower 90660 21 PARTS LIST HP WELDER MODEL PART NO DESCRIPTION ITEM HP 58R Welding die set 4 pieces radius groove state size 31046 HP 58AR Welding dies radius groove lower blocks only state size 31037 HP 59 Steel washers die shoe mounting 92753 HP 60 Die shoes pair w inserts 31053 HP 60F Die shoes flat copper type no grooves 31036 HP 60L Steel die shoe left 31001 HP
10. ELD SPLIT SLEEVE The split sleeve serves two purposes 1 To provide proper alignment 2 To form weld zone keeping all strands together With the unique design each sleeve can be used many times 4 0 BASIC OPERATING PARTS LOCATION FLASHSHIELD FLASHSHIELD SAFETY SWITCH WELD LIMIT SWITCH Limit ADJUSTING SWITCH NUTS WELD DIES b I desti CYLINDER OPERATING SWITCH d HANDLE 7 e UPSET u k PRESSURE CLAMP PRESSURE SELECTION SWITCH CLAMP ARM FOOT SWITCHES A Ww 10 11 12 13 14 TYPICAL OPERATING SEQUENCE All insulating ma terials 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 Twist end of conductor in direction of natural lay pulling outward Carefully square cut conductor end so no individual wires extend beyond cut Note Use a sharp sheer becaus nd preparations are Select correct to be welded Thread conductor midway through sl will assist threa Clamp preset conductor and sleeve into welding die set n open welding dies that the sleeve i Thread other prep conductor to gent Positive contact Clamp that conduc Rotate and center important ceramic sleeve or split into sleeve so
11. INDERS 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 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 weld
12. MICRO WELD MODEL HP 1 CERAMIC FUSION BUTT WELDERS MICRO PRODUCTS COMPANY SERVICE MANUAL TABLE OF CONTENTS SPECIFICATIONS GENERAL OPERATING INSTRUCTIONS BASIC OPERATING PARTS BASIC OPERATING PARTS LOCATION TYPICAL OPERATING SEQUENCE SPECIAL ADJUSTMENTS WwW 0 HOU dS O N H C VY DO OO DIO N 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 HP1 Type of Welding Process Ceramic Fusion Welding Range 4 0 to 8ga AWG Copper 250MCM to 8GA Aluminum Material Suitability Strand or Bunched Conductor Standard Operating Voltages 460 230 Volts Maximum Line Demand 460 Volt 37amps 100 duty cycle 17amps 10 duty cycle Maximum Line Demand 230 Volt 74amps 100 duty cycle 234amps 10 duty cycle Single Phase AC Transformer 24 KVA 50 duty cycle Clamp Method Pneumatic Foot Controlled Upset Method Pneumatic Adjustable Mounting 4 Caster Wheels Dimensions and Weights Height Overall 46 Truck Floor or Bench space 39 x 29 Truck Type Welding Die Height 41 Truck Type Weight 640
13. er 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 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 19 y R 2 20 PARTS LIST HP WELDER
14. he open space need locknut on the open space bolt to n space turn clockwise lt counterclockwise after adjusting suggested settings typically set at the weld limit needs threaded rod turn t off sooner or See suggested to decrease the 4 1 2 turn the nut A pressure regulator with gauge controls the upset pressure To chang clockwise the upset on the adjusting knob screw to decreas pressur to increas loosen the locknut turn knob retighten locknut after adjust CLAMP PRESSURE pressur pressur turn knob counterclockwise tment has been made A pressure regulator with gauge controls the clamp pressure To change on the adjusting knob screw clockwise to decreas the clamp pressure to increas loosen the locknut turn knob retighten locknut aft pressur ter adjust pressur turn knob counterclockwise tment has been made lt J lt J lt J lt J lt J bbe DB gt od 1 1 Welding dies and die shoes in poor condition are the 5 Clean heat 5 Caution PREVENTIVE MAINTENANCE TECHNIOUE Keep in Mind that many years They are d these welders are precision built to last but will require good maintenance procedures signed to be as a utomatic as possible with a minimum dependence on the ability of the operator Adjustments must be made by the operating principles of WELDING
15. ing dies Lower conducting electrode and clamp jaw Velding die shoes Upper clamping member Velding dies and die shoes in poor condition are the main causes of bad welds Care of die sets 1Use a brass or fiber blade to remove particles of flashings that build up on die sets Excessive flash build up causes die burns on material and shorting of die sets 2 Do no attempt to clamp material that is not suited for welder into die sets Undersize materials will slip and burn die grooves oversize materials will overstress clamping parts 3 Do not use welding die sets for a vise These parts will not withstand the mechanical abuse 4 Whenever welding dies are replaced clean bottoms of dies and corresponding die seats to a bright and clean condition before bolting them tightly into place An oxidized surface will insulate the welding dies and reduc ffectiv welding voltage 5 Welding die shoes must swivel freely within the clamp arm pivots to prevent cracking of die shoes File down die shoe boss if necessary 6 Welding die set will ear with use and must be changed occasionally for good welding results Keep and adequate supply of replacement parts available Wire and rod slippage is a problem caused by poor die sets and a major cause of wire breaks 10 8 0 SUGGESTED SETTINGS
16. inside of the welding dies There is an increase of 31 4 spacing between the dies for each graduation on the scale The headpiece closed stop is preset at the factory and should require no field attention This setting will prevent the dies from touching each other if the upset is activated with no stock in the dies To check this setting push movable headpiece to the full closed space then you should measure 3 8 between the welding dies 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 and the left pedal foot pedal operates the right clamp arm operates the left clamp arm To clamp stock place it in the proper welding die grooves and press the top edges of the tilt pedal on the foot valve To release stock press on bottom edge of foot valve tilt pedal Air flowing flow valve that is into each clamp cylinder is slowed by a preset at the factory CAUTIOM Care must be used when clamping stock be sure hands are clear of clamp arms WELDING DIES The welding dies 1 ower and shoes upper serve two purposes 1 To carry current t for welding 2 To prevent slippage during weld cycle W
17. ndi n a ceramic coalescence lid which locks a weld zone Since stra voids on the faying tion and cts as a all nd surfaces terial normally forced to the outside on a is forced into the voids eliminating the upset standard upset weld This type of weld for solid wire 11 8 2 CERAMIC FUSION TECHNIQUE a S STRAND CONDUCTORS Y T _ CONDUCTORS HEATED TO PLASTIC CONDITION AND FORCED TOGETHER SS WELDING CRUCIBLE REMOVED SHOWING WELDED WIRE SECTION WELDING CRUCIBLE 9 0 DIAGNOSTIC CHART FOR TROUBLE SHOOTING 9 0 1 SERVICE HINTS FOR STRAND CONDUCTOR WELDERS welding die shoe ceramic tool welding die shoe welding die lower gt welding die lower Conductors must be able to slide freely within ceramic tools during weld cycle therefore rotate and move ceramic tool side to Side prior to welding Be sure to center ceramic tool between die sets Example of a void in weld zone Porosity and voids in weld zone may be corrected by using one or more of the following suggestions dig Z Ja Increase upset pressure Decrease weld heat Readjust timing point of weld heat cut off limit switch adjustment to allow heat to cut off slightly sooner Check to make sure conductor is not binding in ceramic tool Weld nugget Example of poorly fused weld nugget because of small solid area k Example of properly fused
18. pplied with the welder will handle most size and material types within the range of the welder For new weld applications consult the factory for special die and shoe sets BASIC OPERATING PARTS WELD HEAT SELECTION SWITCH Welding heat is selected by means of a heavy duty tap switch offering twelve 12 steps of voltage The switch is located conveniently on the lower front of the welder Number one 1 indicates high heat 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 LIMIT SWITCH The weld switch is located on the upset cylinder bracket behind the upset cylinder Limit switch adjustment is made by moving the switch initiating barrel along the threaded stud mounted in the movable headpiece The weld limit switch controls the cut of current flow to the welding dies HEAD SPACING MECHANISM The open head space adjustment bolt and locking jam nut are located on the upset cylinder mounting plate to the immediate left front of the upset cylinder The open space scale also located on the front of the upset cylinder mounting is a quick reference guide for determining the amount of open space by lining up the pointer on the movable head endplate with the graduations on the scale When the pointer is in line with no 0 on the scale there is 3 8 between the
19. that eeve ding procedures s centered betw sleeve set for wire the wire ends are Rotating sleeve in direction of lay SO ared conductor into sleeve and allow the ly but ceramic or split firmly contact first conductor to wire ends is important for a good weld tor into welding die sleeve to assure free Lower the flash g until i seconds to assure Unclamp welded co expendable type o nominal conductor larger than condu movement of conductors during the weld process uard and raise up on the operating lever t initiates the operation switch hold for 1 to 3 a complete weld cycle nductors and remov r disassemble reusabl The inside diameter of the sl size therefor sl leeve slight th ctor diameter w ve Fracture le type Ly exceeds the ld zone is slightly 6 0 6 2 6 3 SPECIAL ADJUSTMENTS HEADPICE OPEN SPACE ADJUSTMENTS The typical open space for the HP Welder should be set at 4 1 2 on adjusting increase the op open space turn retighten locknut LIMIT SWITCH The weld limit on adjusting loosen counterclockwise settings UPSET PRESSURE the bol S switch adjus the threaded rod scale If the locknu activating nut clockwise to cut the open space scale loosen the tment is to cut off later t on the If t
20. tially dangerous should the power cords be damaged or severed The welding voltages at the welding dies will not harm an operator since they do not exceed 10 volts 2 2 SAFETY PRECAUTIONS See section 11 0 2 2 1 ELECTRICAL Maintain electrical cable to welder in good repair Welder must be grounded and connections securely tightened Heat Switch must not be changed to new position while a weld cycle is in process Disconnect electrical service befor serving welder high voltages are located within the base of the welder 2 2 2 MECHANICAL Operator while using welder must wear safety glasses Keep all safety guards on welders and use properly Operators must be instructed on basic operation of unit to prevent injury Check nameplate rating and keep within material size range for each welder 2 3 WATER HOOK UP If so equipped It is important that if a welder is to be operated for an extended period of time and heats up water lines must be connected to the welder Connect hoses to inlet and outlet provided at the back of the welder A Shut off valve should be installed in the inlet line and the hose from the outlet should run to an open sight drain Water should be turned off when welder is not in use AIR HOOK UP Set air regulators for from 20 to 80 lbs A safety pop off valve will be activated when air gauge is set for over 100 IDS WELDING DIES The dies and shoes su
21. weld nugget approximate solid area of two times diameter of conductor Amount and length of weld nugget solid portion of weld can be varied by one or more of the following suggestions Ts 2 3 Increase starting space between die sets when weld nugget is small Decrease space between die sets when weld nugget is too large Adjusting limit switch to hold on or cut off current at a different position 13 Fracturing of ceramic tool by one or more of the foll lies 1 sd SL 1 2 ceramic to SSS ol 7 ap Cu Ls and bent conductors can be corrected Lowing methods Decreas weld heat to prevent conductors on either side of sleeve Decrease s and amount ting space of conductor Car Decreas A few of t just do not this process by up th set pressur e very small have enough ELECTRICAL TROUBLE SHOOTING OF WELDER Caution these test s Extreme care should b Dangerous voltages ar xcessiv softening of so as to decrease length of upset exposed to heat and still main stranded and b mechanical strength to be processed tain a fused area unched conductors xercised when making present in the welder electrical Only persons familiar with should per form these tests TROUBLE SHOOTING TABLE See section 9 1 3
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