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3.3 WELDING WITH COATED ELECTRODE. REMOTE CONTROL.
When welding with coated electrode we must connect the electrode-holder clamp and the earth clamp in
agreement with the polarity advised by the electrode manufacture. See figure 9.
Normally, the majority of the electrodes must be placed with straight polarity; that is, the welding electrode-
holder clamp in the negative pole and the earth clamp in the positive pole. However, welding with basic or
special electrodes is usually carried out with reverse polarity; that is, the electrode-holder clamp in positive
pole and the earth clamp in negative pole. We will follow the electrode manufacture's instructions in each
case. A drawing of how the equipment is prepared for this working mode is shown in figure 9. In this case
you will see how the polarity of use is reverse, that is, the welding electrode-holder clamp (B) is placed in
positive pole.
Fig. 9 - Preparation schema.
COATED ELECTRODE.
GAR CONTINUOS
-
+
3.4
WELDING BY MEANS OF TIG PROCEDURE WITH MANUAL GAS CONTROL. REMOTE
INTENSITY CONTROL.
In TIG welding we must only use straight polarity, placing the welding torch in the negative pole.
Furthermore, we must put a bottle of C gas (normally Argon) into the installation, connecting it to the machine
by means of pressure reducer D as shown in figure 10.
Fig. 10. Preparation schema.
TIG WELDING WITH MANUAL GAS CONTROL
D
E
C
GAR CONTINUOS
+
Disadvantages of this installation:
- Manual gas control.
- Manual "arc off" control.
GAR CONTINUOS. Instructions Manual.
MD-1/MD-2
C
MD-1
A
MD-1/MD-2
F
MD-1
-
A
Working mode:
BASIC ELECTRODE or SPECIAL ELECTRODE.
ARC FORCE Control. ANTISTICKING and HOT START
functions enabled.
Working mode: REMOTE or LOCAL.
A- WELDING EARTH CLAMP.
B- WELDING ELECTRODE-HOLDER CLAMP.
In this case to reverse polarity (+).
C- REMOTE CONTROL.
B
Working mode: TIG.
Arc-striking system: Contact with LIFT-ARC.
Working mode: REMOTE or LOCAL.
A- NEGATIVE POLE TIG WELDING TORCH.
B- WELDING EARTH CLAMP.
C- GAS BOTTLE (ARGON).
D- PRESSURE REDUCER VALVE.
E- TORCH GAS HOSE.
B
F- REMOTE CONTROL.
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