12
The MMA/
TIG Switch (1) is used to switch between the two
welding operations: MMA and TIG welding.
▪
Always fix earth cable clamp directly on the welding piece.
Turn the power switch to
‘
ON
’
position. Cooling fan inside the
machine should begin to work once welding starts.
▪
Clamp the welding rod on the electrode holder, the machine is in
the manual welding mode and in the standby state.
▪
In accordance with the thickness of welding work-piece, diameter
of welding rod, working position and technology needs, make
sure suitable welding current with the adjustment knob (2).
(Check out the table on pg.no.11 for electrode size-current criteria)
(
If current is too high, intensified splashing occurs and if low, the melted
welding stick becomes fluid and drop transfer would not proceed smoothly)
For beginners
, the first difficulty is priming the arc.
For best results proceed as follows:
▪
Test the current intensity and the electrode on a piece of scrap
material. Hold the electrode approx. 2 cm above the start of the
joint. Touch the work-piece with the electrode and stroke it
repeatedly on-off the work-piece to start the arc.
▪
Watch the arc only through a face shield
and keep the arc
length approximately 1
–
1.5 times the diameter of the electrode.
Hold the electrode at an angle approximately 70°
–
80°.
▪
Wait until the joint has cooled completely before removing the
slag. If you wish to continue welding a joint after taking a break,
the slag at the end of the joint must be removed first. Prime the
arc in the joint and melt the electrode at the point where the two
joints meet.
GENERAL OPERATION
NOTE:
It is recommended that you try welding and rate of welding
current first on something else than the actual work piece. You can
start welding after having made the necessary selections.
MMA WELDING
IBL T220-105 | 250-106
