Tweco ArcMaster 401S - Manual (Page 47)

ARCMASTER 401S POWER SOURCE
Manual 0-5345 4-9 BASIC WELDING GUIDE
Art # A-07707
Figure 4-21: Principle of Presetting
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B
Preheat Preheat
Dotted lines show effect if no preheat is used
Weld
C
Figure 4-22: Reduction of Distortion by Preheating
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Figure 4-23: Examples of Distortion
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1
Block Sequence.
The spaces between the welds are
filled in when the welds are cool.
2
3
Figure 4-24: Welding Sequence
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4
3
2
1
Figure 4-25: Step back Sequence
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Figure 4-26: Chain Intermittent Welding
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Figure 4-27: Staggered Intermittent Welding