General Maintenance; Torch Maintenance; Connecting The Torch - CEMONT BLUMIG 303S Betriebs-Wartungs Und Sicherheitsanleitung

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.
TYPE OF BREAKDOWN
No functions operate.
Irregular wire feed.
Reduced welding power.
Porous or spongy welds.
Porous or spongy welds.
Gas supply does not switch off.
Presslng torch trigger produces no
result.
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GENERAL MAINTENANCE
POSSIBLE CAUSES
Faulty power cord (one or more phases
disconnected).
Blown fuse.
Insufficient spring pressure.
Wire-guide sheath blocked.
Wrong race - unsuitable for wire, or exces-
sively worn.
Braking on coil excessive.
Oxidized, poorly wound,poor quality wire,
with tangled or overlapping coils, etc.
Earth cable not connected.
Detached or loose connection on switches Check, tighten or renew, as necessary.
Faulty contactor
Faulty rectifier.
No gas.
Draughts in welding area.
Ciogged holes in diffuser.
Gas leakage due to rupture in supply hos-
es.
Solenoid valve blocked.
Faulty pressure regulator.
Poor quality gas or wire.
Worn or dirty solenoid valve.
Faulty torch trigger, disconnected or bro-
ken control cables.
Blown fuse.
Faulty power switch.
Faulty electronic circuit.
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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.
- BLUE Ø 1.5 for wire Ø 0,6- 0.8 mm.
- RED Ø 2.0 for wire Ø 1 - 1.2 mm.
(Wire sheath colour for steel wire).
Ensure that the wire guide hose doesn't touch the roll.
CHECKS AND REMEDIES
Check and remedy.
Renew.
Try tightening regulating knob.
Renew.
Turn roller over or change it.
Loosen brake using adjusting screw.
Remedy by removing defective coils. If problem persists, change the wire
reel.
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.
Check the state of the contacts and the mechanical efficiency of the con-
tactor
Visually check for signs of burn-out; if present, renew rectifler.
Check presence of gas and gas supply pressure.
Use a suitable screen. Increase gas delivery pressure if necessary.
Clear clogged holes using compressed air.
Check and renew faulty component.
Check solenoid operation an electrical connection.
Check operation by removing the hose connecting the pressure regulator
to the power source.
Gas must be extra-dry; change the cylinder or use a different type wire.
Dismantle solenoid; clean hole and obturator.
Remove the torch connection plug and short-circuit the poles; if the ma-
chine operates properly, check the cables and the torch trigger.
Renew using a fuse of the same rating.
Clean with compressed air. Ensure that wires are tightly secured; renew
switch if necessary.
Renew circuit.
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