STAMOS S-MIG 250 Manuel D'utilisation page 22

Welding tips
Disturbance Cause & solution
Wrong workpiece 1. Poor weld preparation
2. Align the edges and attach
for welding (pin)
Weld overthickness 1. Open circuit voltage is too
low
2. Welding speed is too low
3. Incorrect angle of the
welding torch
4. Too thick wire
Too little metal applica- 1. Welding speed is too high
tion 2. Voltage is too low for the
welding speed used
Oxidized appearance of 1. Apply a long arc in the
the welds groove
2. Adjust voltage
3. Wire bent or extending too
far from the wire guide
4. Incorrect wire feed speed
Insufficient penetration 1. Irregular or inadequate
of the root spacing
2. Incorrect angle of the
welding torch
3. Wire guide tube worn
4. Wire feed speed is too low
for the voltage or the welding
speed
Penetration 1. Wire feed speed too high
2. Incorrect angle of the
welding torch
3. Spacing too large
The welding area should be free of rust and paint. The torch will be chosen depending
on the type of material. It is recommended to test the current on a scrap workpiece.
42
EN
Example:
WELDING DISTANCE
wrong
WELDING METHOD
straight
wrong
Tip: Before beginning actual work execute a test weld in order to verify the optimal
weld settings and thus to achieve an optimal result.
EN
good
swivelling
good
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