1.
Turn the power source on and select the MMA function with the MIG/
MMA selector switch.
2. Connection of Output Cables
Two sockets are available on this welding machine. For MMA
welding the electrode holder is shown be connected to the
positive socket, while the earth lead (work piece) is connected
to the negative socket, this is known as DC+ polarity. However
various electrodes require a different polarity for optimum results
and careful attention should be paid to the polarity, refer to the
electrode manufacturers information for the correct polarity.
DC+ Electrode connected to
output socket.
DC- Electrode connected to
output socket.
(3)
Set the welding current using the amperage control
dial.
(6)
Hold the electrode slightly above the work
maintaining the arc while travelling at an even speed.
(4)
Place the electrode into the electrode holder and
clamp tight.
(7)
To finish the weld, break the arc by quickly snapping
the electrode away from the work piece.
(5)
Strike the electrode against the work-piece to
create an arc and hold the electrode steady to maintain
the arc.
(8)
Wait for the weld to cool and carefully chip away
the slag to reveal the weld metal below.
1
2(+)
2(-)
34
| RAZOR MIG 250 Manual
MMA (STICK) WELDING SET UP
