Lincoln Electric 170I manual Ground Test Procedure

Page 37

D-4

 

GROUND TEST PROCEDURE

 

D-4

 

 

 

 

 

WARNING

WARNING ELECTRIC SHOCK can kill

WARNING: This procedure is only suitable for applica- tions using DC mega testers up to 500V.

Note: This procedure is for ‘machines as built’ many modifications could have taken place over the life of a particular machine, so details of this procedure may need to be ‘adjusted’ to suit these modifications.

For prompt service contact your local authorised Liquid Arc Field Service shop.

The insulation resistance values listed below are from Australian Standard AS1966.1.

•Disconnect input power by removing plug from mains supply.

•Remove welding leads (gun and work lead) from the machine before any tests are carried out.

•Remove plug from PCB, install a shorting socket into the harness plug. (The shorting socket is to have pins 4 & 5 jumpered together and all other pins jumpered together separately and insulated.)

•Connect a shorting jumper across the connections to the capacitor and from the capacitor to each rectifier heat sink plate.

•Set power switch to ‘on’ position.

•Input circuit test: Connect one lead of the mega tester to the frame of the machine and the other lead to both the ‘active’ & ‘neutral’ terminals of the 240V input plug. Apply the test. (Minimum resistance 1M•)

•Welding circuit test: Connect one lead of the mega tester to the frame of the machine and the other lead to the positive output stud. Apply the test. (Minimum resistance 1M•)

•Auxiliary circuit test: Connect one lead of the mega tester to the frame of the machine and the other lead to jumper on pins 4 & 5 in the shorting socket. Apply the test. (Minimum resistance 1M•)

•Input circuit to welding circuit test: Connect one lead- of the mega tester to both the ‘active’ & ‘neutral’ ter- minals of the 240V input plug and the other to the positive output stud. Apply the test(s). (Minimum resistance 10M•)

•Input circuit to auxiliary circuit test: Connect one lead- of the mega tester to both the ‘active’ & ‘neutral’ ter- minals of the 240V input plug and the other to the jumper on pins 4 & 5 in the shorting socket. Apply the test. (Minimum resistance 1M•)

•Welding circuit to auxiliary circuit test: Connect one- lead of the mega tester to the positive output stud and the other to the jumper on pins 4 & 5 in the shorting socket. Apply the test. (Minimum resistance 1M•)

•Wire drive test: Connect one lead of the mega tester- to the positive output stud and the other to the drive roll shaft. Apply the test. (Minimum resistance 1M•)

•Remove all harness shorting plugs and connect all plug and leads to PCB. Remove all shorting jumpers. If any problems are encountered, refer to your near- est authorised Liquid Arc Field Service Shop.

Handymig 170i

Page 36 Page 38
Image 37
Page 36 Page 38
Contents Handymig For Engine powered equipment SafetyElectric and Magnetic Fields may be dangerous ARC Rays can burn Electric Shock can killFumes and Gases can be dangerous IiiWelding Sparks can cause fire or explosion Cylinder may explode if damagedAssessment of Area Instructions for ELECTRO- Magnetic CompatibilityPlease Examine Carton and Equipment For Damage Immediately Table of Contents Section D ViiiSection E Section FTechnical Specifications Handymig InstallationIdentify and Locate Components Safety PrecautionsSelect Suitable Location Work Clamp InstallationOutput Connections StackingWork Cable Installation GUN InstallationConnecting Gun Cable to the Handymig GAS ConnectionFigure A.5 Input ConnectionsLine Cord Connection Electrical Input Connection For Rated OutputOperational Features and Controls Design Features AdvantagesOperation General DescriptionWelding Capability Controls and SettingsLimitations Welding Operations Wire LoadingSequence of Operation Figure B.4 Wire ThreadingProcess Guidelines Cleaning Tip And NozzleMaking a Weld Welding with Gmaw MIG Changing Machine Over to Feed Other Wire SizesWelding with Fcaw Innershield Shielding GasOverload Protection Learning to WeldLearning to Weld Gmaw MIG Welding ARC SELF-SHIELDED Fcaw Welding ARCCommon Metals Process SelectionJoint Types and Positions Penetration Welding In The Vertical PositionFillet Welds Welding Techniques for the SELF- Shielded Fcaw Process Machine SET UP for the SELF-SHIELDED Fcaw ProcessVertical-down Welding Correct Welding PositionCorrect Welding Speed Correct Electrical Stickout ESOPractice Helpful HintsWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessFor the Handymig 170i, use the following To Eliminate a Ropy Convex Bead Troubleshooting WeldsTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart Routine Maintenance MaintenanceGUN and Cable Maintenance Changing the Contact TIP Component Replacement ProceduresChanging Drive Roll GUN Handle Parts Changing LinerLiner trim length Ground Test Procedure HOW to USE Troubleshooting Guide 1TROUBLESHOOTINGE-1Troubleshooting Guide TroubleshootingProblems Possible Areas Symptoms Misadjustments Recommended Course of ActionContact your local Liquid Arc Authorized Field Service FacilityWelding Problems Handymig 170i Wiring Diagram Code Wiring DiagramsPrecaucion Warnung Copyright 2000 Lincoln Global Inc
Top Page Image Contents