Select the correct polarity for the
wire being used - see machine
Incorrect wire speed setting
Adjust the wire feed speed
Voltage setting incorrect
Adjust the voltage setting
Small diameter wires and soft wires
like aluminium don’t feed well
through long torch leads - replace
the torch with a lesser length torch
Mig torch lead kinked or too
sharp angle being held
Remove the kink, reduce the angle
or bend
Contact tip worn, wrong size,
wrong type
Replace the tip with correct size and
type
Liner worn or clogged (the
most common causes of bad
feeding)
Try to clear the liner by blowing out
with compressed air as a temporary
cure, it is recommended to replace
the liner
Install the correct size liner
Blocked or worn inlet guide
tube
Clear or replace the inlet guide tube
Wire misaligned in drive roller
groove
Locate the wire into the groove of
the drive roller
Incorrect drive roller size
Fit the correct size drive roller eg;
0.8mm wire requires 0.8mm drive
roller
Wrong type of drive roller
selected
Fit the correct type roller (e.g.
knurled rollers needed for flux cored
wires
Replace the drive rollers
Drive roller pressure too high
Can flatten the wire electrode
causing it to lodge in the contact tip
- reduce the drive roller pressure
Too much tension on wire
spool hub
Reduce the spool hub brake tension
Wire crossed over on the spool
or tangled
Remove the spool untangle the wire
or replace the wire
Use clean dry rust free wire. Do not
lubricate the wire with oil, grease etc
§5.3 DC TIG welding trouble shooting
The following chart addresses some of the common problems of DC TIG welding. In
all cases of equipment malfunction, the manufacturer’s recommendations should be
strictly adhered to and followed.
Tungsten
burning away
quickly
Use pure Argon. Check
cylinder has gas, connected,
turned on and torch valve is
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