General Maintenance; Torch Maintenance; Connecting The Torch - CEMONT TF 300 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.
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.
TYPE OF BREAKDOWN
No functions operate.
Irregular wire feed.
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.
GENERAL MAINTENANCE
POSSIBLE CAUSES
Faulty power cord (one or more phases discon-
nected).
Blown fuse.
Insufficient spring pressure.
Wire-guide sheath blocked.
Wrong race - unsuitable for wire, or excessively
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
Faulty contactor
Faulty rectifier.
No gas.
Draughts in welding area.
Ciogged holes in diffuser.
Gas leakage due to rupture in supply hoses.
Solenoid valve blocked.
Faulty pressure regulator.
Poor quality gas or wire.
Worn or dirty solenoid valve.
Faulty torch trigger, disconnected or broken
control cables.
Blown fuse.
Faulty power switch.
Faulty electronic circuit.
8.2

CONNECTING THE TORCH

Prior to connecting the torch, make sure that the wire sheath (18)
is suited to the diameter of the wire used:
19
20
21
- 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).
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, tighten or renew, as necessary.
Check the state of the contacts and the mechanical efficiency of the
contactor
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 regu-
lator 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
machine 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; re-
new switch if necessary.
Renew circuit.
6 EN
EN
18
22