gala gar GAR CONTINUOS 450 Manuel Technique D'instructions page 29

CHAPTER 3. START-UP. ADJUSTMENT AND OPERATION CONTROLS.
3.1 OPERATION CONTROLS.
The equipment can be started up once the electrical supply installation has been carried out. The control
and regulation system for the GAR CONTINUOS LINE equipment is described in the figure below.
Fig. 6. Control panel of the GAR CONTINUOS equipment.
A- ON/OFF switch.
B- FUSE-HOLDER/FUSE to protect digital measuring device .
C- Connector for REMOTE CONTROL. It permits remote connection of the RC line as well as different TIG
controls. (See section on accessories in CHAPTER 1).
D- REMOTE/LOCAL MODE selector. It defines three control possibilities:
1- REMOTE CONTROL. Remote control of welding current by means of the MD control.
2- LOCAL CONTROL. Welding current control by means of potentiometer E of the equipment.
3 - LOCAL ON/OFF CONTROL . For TIG applications (Use of MODULAR HF DC system). It will permit
ON/OFF control of welding current. The desired current value can be adjusted locally with potentiometer E
situated on the equipment.
E- LOCAL potentiometer to control welding current value.
F- WELDING PROCESS selector. This defines the following possibilities of use:
1 - TIG MODE or purely descending. This working mode is ideal for TIG welding as it includes a
gentle arcing system (LIFT-ARC). ELECTRODE welding can also be carried out if you wish to weld
with short arc. In this working mode the electrode antisticking system and the arc force system are
annulled.
2- BASIC ELECTRODE MODE with reinforced ARC FORCE action and electrode antisticking.
working mode is ideal for welding COATED ELECTRODES with rutile characteristics. In this working mode
we must regulate the desired arc force value with ARC FORCE potentiometer G.
3- SPECIAL ELECTRODE MODE with reinforced ARC FORCE action and electrode antisticking system.
This working mode is ideal for welding SPECIAL COATED ELECTRODES. In this working mode we must
regulate the desired arc force value with ARC FORCE potentiometer G.
4- ARC-AIR MODE. (Exclusive for GAR CONTINUOS 550). In this working mode the equipment works at
constant voltage permitting the AIR CUTTING PROCESS.
G- ARC FORCE potentiometer (control of the arc force value). The ARC FORCE system permits increasing
the value of the welding current (in an adjustable value by means of this potentiometer) when the arc length
drops below a limit value, enabling the initial arc length to be recuperated.
H- Green luminous diode indicating existence of control voltage.
I- Amber luminous diode indicating thermal disconnection by overheating.
J- Connector of the welding voltage positive pole.
K- Connector of the welding voltage negative pole.
L- Digital measuring device for welding parameters V-I.
M- HOT START potentiometer (Aid for arcing coated electrodes).
GAR CONTINUOS. Instructions Manual. Page 29
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