Tweco ArcMaster 401MST - Manual (Page 48)

ARCMASTER 401MST POWER SOURCE
INSTALLATION, OPERATION AND SETUP 3-18 Manual 0-5287
3.12 Setup for MIG (GMAW) Welding with Gas Shielded MIG Wire
A wire feeder (optional) is required for MIG welding.
NOTE
NOTE 1: The operations required may differ depending on the version and the configuration of the
wirefeeder!
NOTE 2: Please read the wirefeeder operating manual!
Power Source Connections
A. Remove all packaging materials. Do not block the air vents at the front or rear of the Power Source.
B. Connect the work lead to the negative welding terminal (-) [positive welding terminal(+) for flux cored electrode
wire]. If in doubt, consult the electrode wire manufacturer. Welding current flows from the Power Source via
dinse type connectors. It is essential, however, that the male plug is inserted and turned securely to achieve a
sound electrical connection.
CAUTION
Loose welding terminal connections can cause overheating and result in the male plug being fused in
the terminal.
!
WARNING
Before connecting the work clamp to the work piece make sure the mains power supply is switched off.
Secure the welding grade shielding gas cylinder in an upright position by chaining it to a suitable
stationary support to prevent falling or tipping.
C. Ensure that the gas cylinder is secured to a building pillar, wall bracket or otherwise securely fixed in an upright
position.
D. Select MIG mode by pressing Process Selection Button until MIG/ CO
2
symbol lights up (Please refer to Page
3-8 for detailed info).
Wirefeeder Connections
A. Connect the welding power cable to the positive welding terminal (+) [negative welding terminal (-) for flux
cored wire]. If in doubt, consult the electrode wire manufacturer. Welding current flows from the Power Source
via dinse type connectors. It is essential, however, that the male plug is inserted and turned securely to achieve
a sound electrical connection.
B. Connect the control cable from the Wirefeeder to the 14 PIN or 19 PIN socket on the Power Source as applicable.
Select appropriate connector by pressing the button on front panel.