Weldclass Weldforce 155M Operating Instructions Manual page 4

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7.3 Lift TIG Operation (Weldforce 175MST only)................................................................................23
8 ACCESSORIES, SPARE PARTS & CIRCUIT DIAGRAMS ..............................................................................24
8.1 MIG Torch and Spares for Weldforce 155M: ................................................................................24
8.2 MIG Torch and Spares for Weldforce 175M: ................................................................................25
8.3 TIG Torch and Spares (Optional Extra for Weldforce 175MST only): ............................................26
8.4 Optional Accessories ....................................................................................................................27
8.5 Drive Rollers .................................................................................................................................27
8.6 Machine Spare Parts: ...................................................................................................................28
8.7 Primary Schematic Circuit Diagram ..............................................................................................31
9 CARE & MAINTENANCE .........................................................................................................................32
9.1 Keep your Welding Machine in Top Condition .............................................................................32
9.2 Storing the Welder .......................................................................................................................32
10 GENERAL GUIDE TO WELDING .........................................................................................................33
10.1 Duty Cycle Rating .........................................................................................................................33
10.2 Choosing a Welding Process - MIG, Stick or TIG? ........................................................................33
10.2.1 The Stick (MMA) Process .....................................................................................................33
10.2.2 The TIG Process ....................................................................................................................34
10.2.3 The MIG Process ..................................................................................................................34
10.3 Joint Preparations ........................................................................................................................35
11 MIG BASIC WELDING GUIDE .............................................................................................................37
11.1 MIG Basic Welding Techniques ....................................................................................................37
11.2 Gas Metal Arc Welding (GMAW) ..................................................................................................37
11.3 Flux Cored Arc Welding (FCAW) ...................................................................................................37
11.4 Position of MIG Torch ...................................................................................................................38
11.5 Distance from the MIG Torch Nozzle to the Work Piece ..............................................................38
11.6 Travel Speed .................................................................................................................................38
11.7 MIG Welding (GMAW) Variables ..................................................................................................39
11.7.1 Preselected Variables ...........................................................................................................39
11.7.2 Primary Adjustable Variables ...............................................................................................39
11.7.3 Secondary Adjustable Variables ...........................................................................................39
11.8 Establishing the Arc and Making Weld Beads ..............................................................................41
11.9 MIG Output Settings ....................................................................................................................41
11.9.1 Changing to a different welding wire ...................................................................................41
11.10 Welding wire Size Selection .....................................................................................................41
11.11 MIG Welding Troubleshooting .................................................................................................42
11.11.1 Porosity Problems ................................................................................................................42
11.11.2 Wire Feed Problems .............................................................................................................43
11.11.3 Weld Quality Problems ........................................................................................................44
12 STICK (MMA) BASIC WELDING GUIDE ..............................................................................................46
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