Soyer BMH-22i Operating Instructions Manual page 50

even though LED "Stud on
workpiece" lights up.
Stud lifts, preweld current
is initiated, but main
current is not ignited.
Varying welding results.
Single-fillet bulging at
equal points.
Intensive sparking, stud
flange almost molten
down.
Stud not welded with total
flange surface, deficient
weld joint strength.
50
Control of stud welder or welding gun is defective. (Stud does not lift,
even though height of lift is correctly set).
 Contact SOYER customer service.
Operating mode is set to position "PRE".
 Set operating mode to position "OP".
Preweld current arc breaks.
 Clean or grind workpiece surface.
Lift is too high.
 Set lift in accordance with the operating instructions for your welding
gun or welding head.
Gas pressure is too high.
 Set gas pressure to the prescribed value.
Welding energy not correctly adjusted.
 Adjust welding energy.
Cable connections too loose. Transition resistances are generated.
 Check all cable connections and earth clamps for tight fit.
Stud too loose or not fully inserted into stud holder until stop.
 Insert stud into stud holder until stop. Replace stud holder, if
necessary.
Magnetic blowing action. Arc is forced into a certain direction.
 Alter fixture of earth clamps, place iron parts on the edges and/or
rotate welding gun.
Height of lift and/or depth of immersion are incorrectly set.
 Refer to the operating instructions of your welding gun to set the
height of lift or depth of immersion correctly.
You have used low-quality studs with inaccurate dimensions or poor
surface finish.
®
Only use SOYER welding studs as per DIN EN ISO 13 918.
Welding time and/or gas flow incorrectly set.
 Reset welding time and/or gas flow.
Parent metal not suitable for welding.
 Use suitable material combinations.
Bulging is caused by magnetic blow effect. The arc is forced into a
certain direction.
 Alter fixture of earth clamps, place iron parts on the edges and/or
rotate welding gun.
Time too long.
 Readjust time for main current duration according to the table.
Welding current too high.
 Readjust welding current.
Time too short.
 Readjust time for main current duration according to the table.
Poor earth connection
 Check earth cables and earth clamps for tight fit, tighten if
necessary.
Workpiece surface too soiled.
 Clean workpiece surface.
Stud face deformed.
 Use new welding studs.
Stud projection over stud holder incorrectly set.
 Set distance between stud holder and stud face to 2-3 mm
BMH-22i