Welding Defects And Their Causes - Soyer BMS-9 Operating Instructions Manual

12.4 Welding defects and their causes

In the following, the most common welding errors, possible causes and troubleshooting
are described.
Please contact Heinz Soyer Bolzenschweißtechnik GmbH if a problem cannot be
solved.
Error
System does not
weld, no sparking
Scorched stud thread
Varying welding
results with
unchanged settings
Stud is not welded to
the whole flange
surface, strength of
the welding is
insufficient
Possible cause and troubleshooting
Stud welding device is not switched on.
• When switching on the device, the blue pilot lamp "Ready" must light up.
Welding points or earth connection points on the workpiece are not
metallically bright. LED display "Stud on workpiece" does not light up (see
chapter "6.3.1 Displaying the operating states" on page 19).
• Prepare the workpiece or studs. Grind connection points to a bright metal
finish.
The stud is too loose in the stud chuck.
• Press or retighten the stud chuck.
Stud chuck is worn.
• Exchange stud chuck.
Stud is too loose or not fully inserted into the stud chuck.
• Insert stud until stop.
• If necessary, exchange the stud chuck.
Welding studs manufactured inaccurately.
• Use only SOYER® weld studs.
Excessive soiling of the workpiece surface.
• 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.
Operating instructions Soyer Bolzenschweißtechnik 49