Tweco 252i Fabricator - Manual (Page 57)

INSTALLATION/SETUP FABRICATOR 252i
Manual 0-5155 3-27 INSTALLATION/SETUP
WARNING
Before connecting the work clamp to the work 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.
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 MIG Gun polarity may need to be switched. Follow the
wire manufacturers recommendation.
3.19 Set-up for MIG (FCAW) Welding with Gasless MIG Wire
The Fabricator 252i is supplied with a Tweco Fusion 250 AMP air-cooled MIG Gun. The Tweco Fusion 250A MIG Gun
is designed with an ergonomic handle and fewer parts to cause performance problems. The Fusion MIG Gun uses
standard readily available Tweco Velocity consumable parts.
When using a gasless flux cored wire, you do not need to have an external gas source attached to the unit. For most
Self Shielded Flux Cored Wire, connect the Work Lead to the positive + terminal and connect the MIG Torch polarity
lead to the negative - terminal. If in doubt, consult the Flux Cored electrode wire manufacturer.
Art # A-10551
+
-
Connect MIG Torch Polarity
Terminal to -/Negative
(Dinse
® type 50)
Positive Output
Terminal
(Dinse
® type 50)
Figure 3-21: MIG Gun Polarity Negative
1. Turn the Main ON/OFF switch OFF (located on the rear panel).