Jasic JT-300P, Operator'S Manual

Page: 19 / 52

19
OPERATION - MMA
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
MMA welding mode
MMA (Manual Metal Arc), SMAW (Shielded Metal Arc Welding) or just Stick Welding.
Stick welding is an arc welding process which melts
and joins metals by heating them with an arc
between a covered metal electrode and the work.
Shielding is obtained from the electrode outer
coating, often called flux. Filler metal is primarily
obtained from the electrode core.
The electrodes outer coating called flux assists in
creating the arc and provides a shielding gas on
cooling forms a slag covering to protect the weld
from contamination.
When the electrode is moved along the work piece
at the correct speed the metal core deposits a
uniformed layer called the weld bead.
MMA operation steps
After connecting the welding leads as detailed you will need to
switch the power switch on the back panel of the machine to
“ ON ”.
Select MMA mode by pressing the welding mode selecting key until
the MMA LED illuminates and MMA can be carried out.
There is now welding voltage output at both output terminals.
Please Note:
THE VRD indicator is now ON to inform you that the output voltage is set to <12V DC.
The digital display meter will now be showing a pre - set welding current and rotating the control dial will
increase or decrease the value.
The TIG300P also features hot start and arc force to ensure that you obtain the best MMA welding
results according to your welding application, please see the following page which describes these
welding parameters.