Possible Faults In The Tig Welding; Welding Power Source Maintenance; Machine Description; Generalities - Inteco Eagle 242 Instrucciones De Uso

2.6.3 Possible faults in the TIG welding

Fault
Oxidations
Tungsten inclusions
Porosity
Hot cracks

2.7 Welding power source maintenance

The welding power source needs routine maintenance accor-
ding to the manufacturer's instructions.
When the equipment is working, all the access and operating
doors and covers must be closed and fixed.
The welding power source must not be modified in any way.
Prevent metal powder from accumulating near the aeration fins
and over them.
Disconnect the power supply before every operation!
Carry out the following periodic controls on the
power source:
* Clean the power source inside by means of low-
pressure compressed air and soft bristel brushes.
* Check the electric connections and all the connec-
tion cables.
For the use and maintenance of the pressure
reducers, consult the specific manuals.
For the maintenance or replacement of torch
component TIG/MIG, electrode holder and/or
earth cables:
* Check the temperature of the component and make
sure that they are not overheated.
* Always use gloves in compliance with the safety stan-
dards.
* Use suitable spanners and tools.
Failure to perform said maintenance will invalidate all war-
ranties and exempt the manufacturer from all liability.
16
Cause
- lnsufficient gas.
- No protection on the re-
verse.
- lncorrect electrode shar-
pening.
- Electrode too small.
- Operating failure (contact
of the tip with the work-
piece).
- Dirt on the edges.
- Dirt on the filler material.
- High advancement speed.
- Current intensity too low.
- Unsuitable filler material.
- High heat supply.
- Dirty materials.

3 MACHINE DESCRIPTION

3.1 Generalities

These constant current inverter power sources are able to per-
form the following types of welding with excellent results:
- MMA,
- TIG (with reduction in the current on short-circuiting).
In inverter welders, the output current is unaffected by va-
riations in the supply voltage and the length of the arc, and is
perfectly levelled, giving the best welding quality.
The generator is equipped with:
- positive (+) and negative (-) socket,
- front panel,
- rear control panel.

3.2 Front control panel

L1: comes on as soon as the power source is powered.
L2: indicates cut-in of any protection devices such as
the thermal protection.
S1: welding selection key.
Permits selection of the welding procedure. Switch-on of the led
confirms the selection.
Electrode welding (MMA)
TIG welding
P1: potentiometer for setting the welding current.
Allows you to continuously adjust the current both in TIG and
in MMA welding. This current stays unchanged when the supply
and welding conditions vary within the allowed ranges.
In MMA welding, the presence of HOT-START and ARC-
FORCE means that the average output current may be higher
than that set.
P2: potentiometer for setting of the Arc-Force.
Available only for MMA welding . As shown by the
scale it adjusts the ARC-FORCE current value (i.e. the additive
welding current needed to overcome the short circuit caused
by the welding bead) from 0% to 100% of the welding current
(at any rate the max possible current is 260A).
Fig.3