GENERAL MAINTENANCE
7 EN
EN
8.0
GENERAL MAINTENANCE
DISCONNECT THE POWER SOURCE FROM THE MAINS BE-
FORE PERFORMING ANY MAINTENANCE WORK.
Every 5-6 months, remove accumulated dust from the inside of
the welding unit with a jet of dry compressed air (after removing
side panels).
BE EXTREMELY CAREFUL TO AVOID BENDING MOVE-
MENTS, WHICH COULD DAMAGE AND CHOKE THE TORCH.
NEVER MOVE THE POWER SOURCE BY PULLING THE
TORCH.
PERIODICALLY CHECK THE CONDITION OF THE TORCH,
WHICH IS THE PART MOST SUBJECT TO WEAR.
8.1
TORCH MAINTENANCE:
1.
GAS NOZZLE:
periodically apply welding spray and clean
nozzle interior of residue.
2.
WIRE GUIDE TUBE:
check the wire passage of the tube for
wear. Replace as necessary.
8.2
CONNECTING THE TORCH
Before connecting the torch to the machine, make sure that the di-
ameter of the wire liner, the groove of the motor-rolls and the con-
tact tip corresponds to the wire used.
Ensure that the wire guide hose doesn’t touch the roll.
FAULT
APPEARANCE
CAUSE AND REMEDY
UNEVEN LEVEL
- Poor preparation.
- Align edges and hold during spot welding.
EXCESS THICKNESS
- No-load voltage or welding speed too low.
- Incorrect torch inclination.
- Wire diameter too large.
INSUFFICIENT METAL
- Welding speed too high.
- Welding voltage too low for welding application.
OXIDISED BEAD
- Weld in the channel if using a long arc.
- Regulate voltage.
- Wire is bent or over-protruding from the wire guide tube.
- Incorrect wire feed speed.
INSUFFICIENT PENETRATION
- Incorrect torch inclination.
- Irregular or insufficient distance.
- Wire guide tube worn.
- Wire speed too slow for voltage used or for welding speed.
OVER PENETRATION
- Wire speed too high.
- Incorrect torch inclination.
- Excessive distance.
LACK OF FUSION
- Distance too short.
- Rough out or grind the weld, then repeat.
CHANNELS
- Welding speed too high.
(This fault is easily detected on sight by the welder, and should be correct-
ed immediately.)
TYPE OF BREAKDOWN
POSSIBLE CAUSES
CHECKS AND REMEDIES
No functions operate.
Faulty power cord (one or more phases
disconnected).
Check and remedy.
Blown fuse.
Renew.
Irregular wire feed.
Insufficient spring pressure.
Try tightening regulating knob.
Wire-guide sheath blocked.
Renew.
Wrong race - unsuitable for wire, or exces-
sively worn.
Turn roller over or change it.
Braking on coil excessive.
Loosen brake using adjusting screw.
Oxidized, poorly wound,poor quality wire,
with tangled or overlapping coils, etc.
Remedy by removing defective coils. If problem persists, change the wire
reel.
Reduced welding power.
Earth cable not connected.
Check that the power cord is in good condition and make sure that the
ground clamps are flrmly fixed to the works piece, which must be free of
rust, grease and paint.
Detached or loose connection on switches Check, tighten or renew, as necessary.
Faulty contactor
Check the state of the contacts and the mechanical efficiency of the con-
tactor
Faulty rectifier.
Visually check for signs of burn-out; if present, renew rectifler.
Porous or spongy welds.
No gas.
Check presence of gas and gas supply pressure.
