Tweco 2460 Heavy Duty CC CV Control Wire Feeder - Manual (Page 29)

Wire spool tension too great
Loosen adjusting screw.
Restriction in gun or cable assembly
Examine cable, gun, and current contact tube (tip) for damage and correct size.
Make sure correct contact tube and liner is being used.
Welding current or voltage not stable
Wire slipping in rolls
Readjust pressure on the drive roll pressure arm.
Restriction in gun cable or gun
See Welding Gun and Cable Description and Maintenance.
Wrong size liner or contact tube
Match liner and contact tube to electrode wire size.
Incorrect voltage adjustment for selected wire speed on the welding machine
Readjust. See Welding Guide in Operation section.
Loose connection on the welding leads or work table
Check and tighten all connections.
Wire wraps around the drive roll
Too much feed roll pressure
Decrease the pressure adjustment on the drive roll pressure arm.
Incorrect liner or contact tube
Make sure that liner and/or contact tube is correct for the size of wire being fed.
No speed control
Broken or loose wires in wire feed control circuit
Correct by checking all connections.
Bad PC board
Replace.
Bad wire feed speed control potentiometer
Replace.
No gas flow
Gas valve not energizing
Broken lead to valve.
Bad PC board
Replace.
Open gas valve coil
Replace gas valve.
TIP-218
CONTROL BOX ASSEMBLY NO. 376783A & 376783B
May 29, 1996 Revised Page 5