Tweco 250i Transmig Inverter - Manual (Page 35)

INSTALLATION/SETUP TRANSMIG 250i
Manual 0-5187 3-17 INSTALLATION/SETUP
3.10 Optional Wire Feeder Set-up for MIG (FCAW) Welding with Gasless MIG Wire
The Transmig 250i is supplied with a Tweco Fusion 250 AMP air-cooled MIG Torch. The Fusion MIG Torch is designed
with an ergonomic handle and fewer parts to reduce performance problems. The Fusion MIG Torch uses standard
readily available Tweco consumable parts.
When using a gasless flux cored wire, you do not need to have an external gas source attached to the 2RT. If an external
gas source is connected, then make sure it is turned OFF.
For most Self Shielded Flux Cored Wire, connect the Work Lead to the positive + terminal on the front of the 250i
and connect the MIG Torch polarity lead from the back of the 2RT to the negative - terminal on the front of the 250i.
The 2RT Wire Feeder is fitted with an 8M interconnection cable assembly to connect from the back of the 2RT to the
front of the 250i welding power source.
+
-
Front View 2RT Rear View 2RT Front View 250i
Control Cable
Welding Power Cable
from Wire Feeder
Work Lead
Art # 10350
Gas Hose
Figure 3-28: MIG Torch Polarity Negative
WARNING
Before connecting the work clamp to the work make sure the mains power supply is switched OFF.
CAUTION
Loose welding terminal connections can cause overheating and result in the male plug being fused in the
terminal.
Remove any packaging material prior to use. Do NOT block the air vents at the front or rear of the Welding
Power Source.
NOTE
Depending on the type of wire you will be using the Welding Power Cable may need to be switched. Follow
the wire manufacturers recommendation.
NOTE
Spool hub and feed plate set up and operation are the same as the 250i which can be reviewed later in this
section starting at 3.14.