Connection For Mma Welding; Positioning The Electrodes In The Gun; Possible Faults In The Mma Welding; System Presentation - Inteco FLASH GUN 25 Instrucciones De Uso

2.4.1 Connection for MMA welding

2.4.2 Positioning the electrodes in the gun

2.4.3 Possible faults in the MMA welding

Excessive spatter:
- Long arc.
- High current.
Craters:
- Fast movement of the electrode away from piece.
Inclusions:
- Poor cleanliness or distribution of the passes.
- Defective movement of the electrode.
Insufficient penetration:
- High progression speed.
- Welding current too low.
- Narrow chamfering.
- Deseaming failure on top.
Sticking:
- Arc too short.
- Current too low.
Blow-hole and porosity:
- Humidity in electrode.
- Long arc.
Cracks:
- Current too high.
- Dirty materials.
- Hydrogen in weld (present on electrode coating).

3 SYSTEM PRESENTATION

3.1 Generalities

These power sources are purposely designed for MMA welding.
The innovative inverter technology ensures top level perfor-
mance with very low absorption.
The generator is equipped with:
1: power supply cable.
Connects the system to the mains.
2: earth cable.
Connects the generator to the piece to be welded.
3: electrode holder gun.
It allows the electrode to hook onto the gun.
4: electrode clasping lever
It allows the opening and closing of the electrode holder gun.
5: Off/On switch.
Turns on the electric power to the welder.
It has two positions, "O" off, and "I" on.
6: Torch button.
It enables the output of the set welding current.
L1 (green led): comes on as soon as the power source is
powered.
L2 (yellow led): indicates cut-in of any protection devices such
as the thermal protection.
L2 (yellow led): remains on until the fault has been
removed and in any case until the inner temperatures
are not within the normal values; in this case it is neces-
sary to leave the power source on to exploit the opera-
ting ventilator and reduce the time when it is not active.
L2 (red led): comes on when voltage is present at the welder
output.
P1: potentiometer for setting the welding (cutting) current.
Allows you to continuously adjust the welding (cutting) current.
This current stays unchanged when the supply and welding con-
ditions vary within the allowed ranges.
The positions marked on the potentiometer with 1.5, 2.0, 2.5
show the optimal current setting and the welding of the 1.5, 2.0,
2.5 mm electrodes.
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