OPERATING MANUAL
Transmig 255i
Transmig 255i
MIG (GMAW) WELDING
5-8
Manual 0-5550
5.08 Wire Reel Brake
The wire reel hub incorporates a friction brake which is adjusted during manufacture for optimum braking.
If it is considered necessary, adjustment can be made by turning the Thumb Screw inside the open end of the
hub clockwise to tighten the brake. Correct adjustment will result in the wire reel circumference continuing
no further than 10-20mm after release of the trigger. The electrode wire should be slack without becoming
dislodged from wire spool.
!
CAUTION
Overtension of brake will cause rapid wear of mechanical WIREFEED parts, overheating of electrical componentry and
possibly an increased incidence of electrode wire Burnback into contact tip.
Ensure that the alignment pin on the wire spool hub aligns with the hole allocated in the Handispool.
Spool Hub Tension
Thumb Screw
Art # A-10429
Figure 5-10: Wire Reel Brake
5.09 Setup for MIG (GMAW) Welding with Gas Shielded Mig Wire
A. Fit the MIG Torch to the Power Source. (Refer to Section 5.02 Attaching the Tweco Fusion MIG Torch).
B. Connect the Mig torch polarity lead to the positive welding terminal (+). If in doubt, consult the electrode
wire manufacturer. Welding current flows from the Power Source via Dinse terminals. It is essential,
however, that the male plug is inserted and turned securely to achieve a sound electrical connection.
C. Switch the Power Source On/Off switch located on the rear of the Power Source to the On position and
ensure the Power indicator on the Front Panel is illuminated. Set the MIG Torch trigger switch operation
either 2T ot 4T mode. Refer to Section 4.02.12.
D. Select MIG mode with the process selection control. (refer to Section 4.02.13 for further information).
E. Fit the correct Feed Roll for the Gas Shielded MIG wire being used. Refer to Section 2.11 Options and
Accessories for Feed Roll types and Part Numbers
F. Place the MIG wire spool onto the spool holder. Refer to Sections 5.03 for 300mm diameter spools or 5.04
for 200mm diameter spools.
G. Feed wire through the wire drive mechanism. Refer to Section 5.05.
H. Connect the work lead to the negative welding terminal (-). If in doubt, consult the electrode wire
manufacturer. Welding current flows from the Power Source via Dinse terminals. It is essential, however,
that the male plug is inserted and turned securely to achieve a sound electrical connection.