IMPOR
TANT INFORMA
TION
14
MIG 140 INVERTER WELDER 058-9305-6
Welding voltage control
This setting is located on the upper front panel. It is used to adjust the welding voltage when MIG
mode is engaged.
Output current indicator
The indicator is located on the upper front panel and glows when the welder is providing sufficient
weld power.
Wire speed control
This control is located on the upper front panel and controls the speed at which the wire is fed out
of the welding torch. This control adjusts the welding amperage when the stick mode is engaged.
The wire speed needs to be closely matched to the rate at which the wire melts. The wire speed
must be selected based on the type and diameter of the wire being used, the heat setting selected
and the welding position to be used.
Note: The wire fed will be faster without an arc and slower when an arc is being drawn.
2T/4T selector
This selector is located on the upper front panel and used to select either 2T mode or 4T mode.
2T mode: This is called two
-
tact mode, in which the welding current flows only when the welding
torch is kept on the work piece. In this mode, simply touch the work piece with the torch and hold
the trigger to start the arc. Continue holding the trigger while welding. Release the trigger to finish
the process.
4T mode: This is called four
-
tact mode, which requires a sequence of operation with the welding
torch. In this mode, push and release the trigger once to start welding, and push and release once to
stop the welding.
Polarity changing
For flux core welding (no shielding gas is
required), the red MIG gun lead is connected to
negative (“-”) polarity terminal and the ground
cable is connected to the positive (“+”)
terminal.
For MIG welding (solid wire) using shielding
gas, the red MIG gun lead is connected to
positive (“+”) and the ground cable is
connected to negative (“-”). Tighten the leads
using the fasteners.
NO
GAS
GAS
MC-589305-03