Forney 190 MP Operating Manual page 29

PROBLEM
Poor quality welds.
Weld deposit "stringy" and
incomplete.
Weld deposit too thick.
POSSIBLE CAUSE
Insufficient gas at weld area.
Rusty, painted, oil or greasy
workpiece.
Rusty or dirty wire.
Poor gound contact.
Incorrect gas/wire combination
Torch moved over workpiece too
quickly.
Gas mixture incorrect.
Torch moved over workpiece too
slowly.
Welding voltage too low.
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POSSIBLE SOLUTION
Check that the gas is not being
blown away by drafts and, if so,
move to more sheltered weld area.
If not check gas cylinder contents
gauge, regulator setting and
operation of gas valve.
Ensure workpiece is clean and dry.
Ensure wire is clean and dry.
Check gound clamp/workpiece
connection.
Check the manual for the correct
combination.
Move the torch slower.
See shielding gas table.
Move the torch faster.
Increase welding voltage.
29