Weldclass Weldforce 202T - Page 5

Weldforce 202T AC/DC
© Weldclass 2020 | E.&O.E. 5
11 STICK (MMA) BASIC WELDING GUIDE ..............................................................................................35
11.1 Size of Electrodes .........................................................................................................................35
11.2 Storage of Electrodes ...................................................................................................................35
11.3 Electrode Polarity .........................................................................................................................35
11.4 Effects of Stick (MMA) Welding on Various Materials ..................................................................35
11.4.1 High Tensile and Alloy Steels ................................................................................................35
11.4.2 Manganese Steels ................................................................................................................35
11.4.3 Cast Iron ...............................................................................................................................35
11.5 Types of Electrodes ......................................................................................................................36
11.5.1 Mild Steel .............................................................................................................................36
11.5.2 Cast Iron ...............................................................................................................................36
11.5.3 Stainless Steel ......................................................................................................................36
11.6 Suggested Settings for Typical Stick (MMA) Applications ............................................................36
11.7 MMA Welding Techniques ...........................................................................................................37
11.7.1 A Word for Beginners ...........................................................................................................37
11.7.2 The Welder ...........................................................................................................................37
11.7.3 Striking the Arc .....................................................................................................................37
11.7.4 Arc Length ............................................................................................................................38
11.7.5 Rate of Travel .......................................................................................................................38
11.8 Making Welded Joints ..................................................................................................................39
11.8.1 Butt Welds ............................................................................................................................39
11.8.2 Fillet Welds ...........................................................................................................................40
11.8.3 Vertical Welds ......................................................................................................................41
11.8.4 Overhead Welds ...................................................................................................................42
11.9 MMA (Stick) Troubleshooting ......................................................................................................43
12 TIG BASIC WELDING GUIDE ..............................................................................................................45
12.1 TIG Electrode Selection and Preparation .....................................................................................45
12.1.1 Tungsten Electrode Selection & Polarity ..............................................................................45
12.1.2 Preparing Tungsten ..............................................................................................................46
12.1.3 Shielding Gas for TIG Welding ..............................................................................................47
12.1.4 Typical TIG Welding Settings ................................................................................................47
12.2 Starting the Weld .........................................................................................................................48
12.2.1 Lift-Arc Ignition.....................................................................................................................48
12.2.2 HF Ignition ............................................................................................................................48
12.3 Main Weld Current .......................................................................................................................49
12.3.1 DC Current ...........................................................................................................................49
12.3.2 AC Current ............................................................................................................................49
12.3.3 Pulse Welding.......................................................................................................................50
12.3.4 AC Balance ...........................................................................................................................51