Welding operation
Operating Instructions Soyer Bolzenschweißtechnik 53
14.4 Welding defects and their causes
In the following, the most common welding errors, possible causes and trouble-
shooting are described.
Please contact Heinz Soyer Bolzenschweißtechnik GmbH if a problem cannot be
solved.
Error Possible cause and troubleshooting
Device does not weld, no
sparking
Stud welding device is not switched on.
• When switching on the device, the red indicator light “Ready” must
light up.
Welding points or earth connection points on the workpiece are not
metallically bright. The LED display “Stud on workpiece” does not light
up (see chapter “6.3.2 Displaying the operating states” on page 22).
• Prepare the workpiece or stud. Grind connection points to a bright
metal finish.
Scorched stud thread Stud is too loose in the stud chuck.
• Press or retighten the stud chuck.
Stud chuck is worn.
• Exchange stud chuck.
Varying welding results
with unchanged settings
Stud is too loose or not fully inserted into the stud chuck.
• Push in the stud until stop.
• If necessary, exchange the stud chuck.
Welding studs manufactured inaccurately.
• Only use SOYER® welding studs.
Stud is not welded to the
whole flange surface,
strength of the welding is
insufficient
Contamination on the surface of the workpiece is too heavy.
• Clean or grind the surface of the workpiece to a bright metal finish.
The front surface of the welding stud is deformed.
• Use new welding studs.
• Only use SOYER® welding studs
The welding gun was placed in tilted position.
• Position the welding gun evenly.
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