Tweco VS212 Wire Feeder - Manual (Page 36)

TRANSMIG VS 212
SERVICE 5-2 Manual No. 0-4949
2. Wire feed motor operates but wire does not feed
or feeds erratically.
A. Incorrect voltage/current and/or wire feed
speed settings.
1) Make sure all connections to the wire
feeder are tight.
2) Make sure feed rolls are tight.
B. Check for too little or too much pressure
on the feed rolls.
1) Refer to spring tension knob in section
2.09 Internal Controls and Connections
in this manual.
2) Check for correct feed roll size for
welding wire being used.
3) Check to see if wire spool tension is
too great.
4) Refer to hub tension bolt in section
2.09 Internal Controls and Connections
in this manual.
C. Check for restriction in welding gun and/
or contact tip.
D. Check for correct gun liner and contact
tip sizes for welding wire being used.
3. Wire wraps around the feed rolls.
A. Check for too much pressure on the feed
rolls.
1) Refer to spring tension knob in section
2.09 Internal Controls And
Connections in this manual.
B. Check alignment of input and output guides.
C. Check for correct gun liner and contact
tip sizes for welding wire being used.
D. Worn or damaged contact tip.
4. Wire does not feed with gun switch depressed.
A. Check power supply input to the VS 212
and cable connection.
B. Check for continuity of the welding gun
trigger leads with the trigger depressed.
1) If no continuity, repair or replace the
welding gun.
C. Check for a locked or shorted motor.
D. An electronic protection circuit may have
activated.
1) Reset by placing power switch in the
off position for at least 60 seconds.
5. Wire feed motor continues to run after gun switch
has been released.
A. Check Trigger Hold switch (see section
2.08).
B. Check for shorted welding gun trigger
leads while the gun switch on the welding
gun is released.
1) If shorted, repair or replace the welding
gun.
6. Wire feeds but no gas flows.
A. Check to see if the gas cylinder is empty
or the valve closed.
1) Make sure proper gas flow rate has
been set.
B. Check for a possible restriction in the gas
line or gas valve.
1) Check to see if the welding gun nozzle
is plugged.
7. Gas flows all the time or leaks.
A. Make sure all connections are tight.
B. Check for foreign material inside the gas
valve.
8. Wire feeds, contactor closes, but welding wire
is not hot - there is no arc.
A. Make sure all connections have been made
to both the power source and wire feeder.
B. Make sure the cable between the contactor
and feedhead is properly connected.
1) If using a CV power source, make sure
the output contactor has been
energized.
2) Refer to section 4.01 Prewelding
Procedure in this manual.
C. Work lead not connected.