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viii
viii
TABLE OF CONTENTS
Page
Learning to Weld (Continues) ......................................................................................------
Welding in a Vertical Position........................................................................B-10
Vertical-up and Overhead Welding .........................................................B-10
Vertical-down Welding ............................................................................B-11
Machine Set Up for the Self-Shielded FCAW Process .................................B-11
Welding Techniques for the Self-Shielded FCAW Process ..........................B-11
The Correct Welding Position .................................................................B-11
The Correct Way to Strick an Arc............................................................B-12
The Correct Electrical Stick Out..............................................................B-12
The Correct Welding Speed....................................................................B-12
Helpful Hints..................................................................................................B-13
Practice .........................................................................................................B-13
Machine Set Up for the GMAW (MIG) Process.............................................B-14
Welding Techniques for the GMAW (MIG) Process......................................B-14
The Correct Welding Position .................................................................B-14
The Correct Way to Strick an Arc............................................................B-14
The Correct Electrical Stick Out..............................................................B-15
The Correct Welding Speed....................................................................B-15
Helpful Hints..................................................................................................B-15
Practice .........................................................................................................B-15
Troblreshooting Welds ..................................................................................B-16
To Eliminate Porosity .............................................................................B-16
To Eliminate a Ropy Convex Bead ........................................................B-16
To Reduce Spatter.................................................................................B-16
To Correct Poor Penetration ..................................................................B-16
If Arc Blow Occurs..................................................................................B-16
To Eliminate Stubbing............................................................................B-16
Proper Gun Handling .............................................................................B-17
Application Chart .....................................................................................................B-18
Maintenance ....................................................................................................Section D
Safety Precautions ................................................................................................D-1
Routine Maintenance.............................................................................................D-1
Wire Feed Compartment.................................................................................D-1
Fan Motor........................................................................................................D-1
Wire Reel Spindle ...........................................................................................D-1
Gun and Cable................................................................................................D-1
Gun Cable Cleaning................................................................................D-1
Contact Tips, Nozzles, and Gun Tubes ..................................................D-1
Component Replacement Procedures ..................................................................D-2
Changing the Contact Tip ...............................................................................D-2
Changing Drive Roll........................................................................................D-2
Changing Liner................................................................................................D-3
Gun Handle Parts ...........................................................................................D-3
Ground Test Procedure.........................................................................................D-4
Troubleshooting..............................................................................................Section E
Safety Precautions.................................................................................................E-1
How to Use Troubleshooting Guide.......................................................................E-1
Troubleshooting Guide.............................................................................E-2 thru E-4
Wiring Diagrams..............................................................................................Section F
Handymig 170i Wiring Diagram .............................................................................F-1
Handymig 170i Parts ............................................................................P390,P202,P189
Handymig 170i