Mma Operation - Impax IM-TIG200 Instruction Manual

MMA OPERATION

The chart below is an indicator of the electrode
diameter and the corresponding welding
current. This is intended as a guide only as
results can vary depending on material, work
piece thickness, welding position and joint form.
Table 1
Electrode diameter (mm)
1.6 mm
2.0 mm
2.5 mm
3.2mm
4.0mm
Connect to the mains supply and press the
On/Off switch (Fig.5) to the ON position ( l ).
Fig 5
The digital display will illuminate and the cooling
fan will operate. To stop the machine, press the
On/Off switch to the OFF position (O).
Press the MMA/TIG button to MMA mode, Fig.6.
Fig 6
Set the amperage (see Table 1) by adjusting the
amps control dial (Fig.7) until the desired setting
is reached.
Amperage (A)
44-84
60-100
80-120
108-148
Warning! Always wear a full face mask, welding
140-180 gloves and protective clothing. Wear goggles
while chipping slag.
Do not switch on the power supply until you are
ready to start welding. Practice welding on a
piece of scrap material.
Note: If the machine stops at any time and the
thermal cut out indicator on the front panel
illuminates, the thermal cutout has intervened.
Wait until the transformer has cooled sufficiently
for work to recommence. This could take
considerable time and is denoted by the thermal
cut out indicator going out.
A Word To Beginners
For those who have not yet done any welding,
the simplest way to commence is to run beads
on a piece of scrap plate. Use mild steel plate
about 6.0mm thick and a 3.2mm electrode.
Clean any paint, loose scale or grease off the
plate and set it firmly on the work bench so that
welding can be carried out in the downhand
position. Make sure that the work clamp is
making good electrical contact with the work,
either directly or through the work table. For
light gauge material, always clamp the work lead
directly to the job, otherwise a poor circuit will
probably result.
The Welder
Place yourself in a comfortable position before
beginning to weld. Get a seat of suitable height
and do as much work as possible sitting down.
Don't tense your body. Relax and you will find
that the job becomes much easier.
22
Fig 7