Lincoln Electric LTW1 - Manual (Page 2)

1 1 TABLE OF CONTENTS
Page
Learn to Weld .................................................................................................................2
Arc Welding Circuit....................................................................................................2
Self-Shielded FCAW (Flux Core Arc Welding). .........................................................3
GMAW (Gas Metal Arc Welding) ..............................................................................3
Process Selection......................................................................................................4
For GMAW (MIG) Process..................................................................................4
For FCAW (Innershield) Process ........................................................................4
Common Metals..................................................................................................4
Joint Types and Positions .........................................................................................4
Butt Joints ...........................................................................................................4
Penetration .........................................................................................................5
Fillet Joints ..........................................................................................................5
Welding In The Vertical Position ...............................................................................5
Vertical-up And Overhead Welding ....................................................................5
Vertical-down Welding ........................................................................................6
Machine Set Up For The Self-Shielded FCAW Process ...........................................6
Welding Techniques For The Self-Shielded FCAW Process ....................................6
1. The Correct Welding Position .........................................................................6
2. The Correct Way To Strike An Arc .................................................................7
3. The Correct Contact Tip To Work Distance ....................................................7
4. The Correct Welding Speed (Travel Speed)...................................................7
Helpful Hints ..............................................................................................................8
Practice .....................................................................................................................8
Machine Set Up For The GMAW (MIG) Process ......................................................9
Weld Techniques For The GMAW (MIG) Process ....................................................9
1. The Correct Welding Position .........................................................................9
2. The Correct Way To Strike An Arc .................................................................9
3. The Correct (CTWD) Contact Tip To Work Distance....................................10
4. The Correct Welding Speed ........................................................................10
Helpful Hints ............................................................................................................10
Practice ...................................................................................................................10
Troubleshooting Welds ..............................................................................................11