51
Welding result
defective
1.The start check (see page 13) has been carried out (indicators are okay).
2. Defective welding results were achieved:
Situation Cause and remedy
- Defective weld • Set correct charging voltage (see table 4 - 2 and
table 4 - 4)
• Set welding gun (see table 4 - 1 and table 4 - 3
and chapter 4.7)
• General: study and apply chapter 4.3 to chapter
4.7 inclusive
- "Cold weld" • Chuck : clean or replace
• Welding time too short (spring force or lift too
high)
- "Very hot weld" • Welding time too long (spring force or lift too low)
- "Bond weld,
stud does not hold"
• Very strong melting loss, stud does not lift off
♦ Increase spring force or lift significantly, clean or
replace gun plunger
- Stud shaft or stud thread
scorched
• Chuck does not match the welding element
dimensions -> use a suitable chuck
• Chuck has been expanded retighten or
replace (in future pull off the gun vertically from the
welded studs)
- Constantly changing
welding results
• Place gun on workpiece at right angle; replace
positioning feet if necessary
• Gun plunger is stiff ->clean or replace
- Irregular welds • Gun plunger is stiff ->clean or replace
- Arc drop during welding
(no-load welding))
• Clean welding site of oil, grease and other
contamination
• Check workpiece for spring
• Check spring force or lift
• Clean supporting feet or supporting tube
• Optimise earth clip position
- Welding stud crooked • Place gun on workpiece at right angle
• Replace worn or bent positioning feet
• Replace positioning tube
- Welds with distinct
beading
on one side (blowing
action)
Eliminate magnetic arc blowing action by
• changing the position of the welding cable
• changing the position of the earth clips (see fig. 1
- 12)
• bringing in additional plates on iron parts
*) Check only by electricians!
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