Mmaw (Stick) Trouble Shooting - Weldtronic TM250C Operating Manual

4.2 MMAW (Stick) Welding Trouble Shooting
The following chart addresses some common problems during MMAW Welding.
In the event of equipment malfunction, contact an authorized service agent.
Possible Reason
No Arc
Incomplete welding circuit
Wrong Mode Selected
Porosity
Arc length too long
Contaminated base metal
Damp or Contaminated Electrodes
Lack of Penetration
Insufficient heat input
Contaminated base metal
Excessive Spatter
Amperage set to high
Arc length too long
Excessive penetration
Amperage set to high
Incorrect travel speed
Distortion
Excessive heat input
Poor joint preparation
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Suggested Solution
Check Earth & Work leads connected
Check the MMA/Stick switch is selected
Shorten arc length
Remove any paint , grease, oil & dirt
Dry Electrode or replace
Increase amperage
Remove any paint , grease, oil & dirt
Reduce Amperage
Shorten arc length
Reduce Amperage
Increase travel speed
Reduce Amperage
Check joint design and fit up