Resistance welder MULTISPOT MI-100control
Operation
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6.9 Operating the welding gun
6.9.1 Push spot welding
Wear protective goggles and gloves!
Electrodes heat up! Flying sparks!
Only use the mode “push spot welding” is the area to be
welded cannot be reached with the spot welding pliers!
1. Grind sheet surface and the area between the sheets until
completely bare.
2. In the welding area the sheets must have direct contact
without air gap. Otherwise welding is impossible.
3. Check the condition of welding electrodes and grind them,
if necessary.
4. Ensure perfect earthing to bottom sheet as close to the
welding spot as possible.
Fig. 92: Welding gun
Contact piece (1) / Release button (2)
Select mode “push spot welding” and sheet thickness on
display
(Thickness of more than 1.5 mm cannot be selected!)
Press the welding gun to the welding point with a pressure of
approx. 0.78 – 0.12 daN.
Fig. 93: Pressure on welding point
NOTE!
Excessive contact pressure will lead to poor welding results when the distance to the
ground connection is too great.
Inadequate contact pressure – air gap or paint (grease) between the steel sheets –
will result in the upper sheet being burnt through and the electrode cap destroyed.
The air cooling for the spot gun is activated for approx. 15 sec. after the first spot.
When the gun is hot, the cooling run continuously until the gun has cooled down to
approx. 40 °C.
Do not switch the unit off during the cooling phase to prevent any heat congestion.
Keep hold of release button of the gun until welding process has ended
Always spot-weld thinner sheets to thicker ones!
Proceed with welding towards the grounding point.
Spacing between the welding spots approx. 20 mm.
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