Resistance Welder MULTISPOT MI-100
Operation
36
6.5 Operating the welding gun
6.5.1 Push
spot
welding
Caution!
Electromagnetic fields! 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.
5. Select mode "push spot welding" and sheet
thickness on display (thickness of more than
1.5 mm cannot be selected!).
1
2
Fig. 41: welding gun
contact piece
(1) /
release button (2)
6. Press the welding gun to the welding point
with a pressure of approx.
8 –12 kgs
.
Fig. 42: 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 runs 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.
