Description Of Front Panel Controls; Front Panel; Internal Panel Controls; Basic Information Regarding Mig Welding - CEMONT BLUMIG 243C Betriebs-Wartungs Und Sicherheitsanleitung

13 - Digital voltmeter
14 - Digital ammeter
4.0 DESCRIPTION OF FRONT PANEL CON-
TROLS
4.1

FRONT PANEL

Picture 3.
200A / 250A
2
1
5
6
7
11
300A
1
2
5
6
7
11
1 - Welding system selector:
In position press the torch button to start welding, and re-
lease to stop.
In position press the torch button to deliver gas; on re-
lease, wire feed and current are activated; press again to stop wire
feed and current and release to shut off the gas supply.

DESCRIPTION OF FRONT PANEL CONTROLS

3
4
10
8
9
3
4
10
8
9
6 EN
In position the welder operates in timed mode; press the
torch button to start the welding phase, which stops automatically
after the time interval as set on the timer potentiometer.
2 - Machine ON indicator lamp
3 - Machine overheating indicator lamp
4 - Wire feed speed control -potentiometer
5 - Spot welding time control potentiometer, from 0.3 to 10 sec-
onds (operating only with selector (Ref. 1 - Picture 3 Page 6.) set
to position
6 - Wire feed motor acceleration time control potentiometer.
7 - Control potentiometer to regulate time during which welding
power is maintained after the relative shutdown signal. In practice,
at the end of welding, if this time is too short, the wire remains
stuck in the bath or protrudes too far from the torch contact tube;
otherwise, if the control time is too long, the wire remains stuck in
the torch contact tube, often causing damage to the latter.
8 - Euro torch connector
9 - Quick connectors for ground clamp
10 - Power switch.
11 - Welding voltage adjustment switch.
5.0

INTERNAL PANEL CONTROLS

- Auxiliary circuit safety fuses
- Wire feed gearmotor
6.0 BASIC INFORMATION REGARDING MIG

WELDING

MIG WELDING PRINCIPLES
MIG welding is autogenous, i.e. it permits welding of pieces made
of the same metal (mild steel, stainless steel, aluminium) by fu-
sion, while granting both physical and mechanical continuity. The
heat required for melting is generated by an electric arc that
strikes between the wire (electrode) and the piece to be welded.
A shield gas protects both the arc and the molten metal from the
atmosphere.
7.0 CONNECTION AND PREPARATION OF
EQUIPMENT FOR WELDING
CONNECT WELDING ACCESSORIES CAREFULLY TO AVOID
POWER LOSS OR LEAKAGE OF DANGEROUS GASES.
CAREFULLY FOLLOW THE SAFETY STANDARDS
N.B. DO NOT ADJUST SWITCHES DURING WELDING OPER-
ATIONS TO AVOID DAMAGE TO THE EQUIPMENT.
CHECK THAT GAS IS DELIVERED FROM THE NOZZLE AND
ADJUST FLOW BY MEANS OF THE PRESSURE REDUCER
VALVE.
CAUTION: SCREEN GAS FLOW WHEN OPERATING IN OUT-
DOOR OR VENTILATED SITES; WELDING OPERATIONS
MAY NOT BE PROTECTED DUE TO DISPERSION OF INERT
SHIELDING GASES.
7.1 WELDING
1. Open the gas cylinder and regulate gas outlet flow as re-
quired. Fit the earth clamp on a part of the welding piece with-
out any paint, plastic or rust.
EN