OPERATING MANUAL
Transmig 220i
Transmig 255i
Transmig 255i
Manual 0-5550
5-7
MIG (GMAW) WELDING
5.06 Feed Roller Pressure Adjustment
The pressure (top) roller applies pressure to the grooved feed roller via an adjustable pressure screw. These
devices should be adjusted to a minimum pressure that will provide satisfactory WIREFEED without slippage. If
slipping occurs, and inspection of the wire contact tip reveals no wear, distortion or burn back jam, the conduit
liner should be checked for kinks and clogging by metal flakes and swarf. If it is not the cause of slipping, the
feed roll pressure can be increased by rotating the pressure screw clockwise.
WARNING
Before changing the feed roller ensure that the mains supply to the power source is switched off.
!
CAUTION
The use of excessive pressure may cause rapid wear of the feed rollers, shafts and bearing.
5.07 Changing the Feed Roll
To change feed roll remove the feed roll retaining screw by turning in an anticlockwise direction. Once the feed
roll is removed then to replace feed roll simply reverse these directions.
A dual groove feed roller is supplied as standard. It can accommodate 0.9/1.2mm diameter hard wires. Select
the roller required with the chosen wire size marking facing outward.
GROOVE “B”
GROOVE “A”
GROOVE “A” SIZE
GROOVE “B” SIZE
A-09583
Figure 5-8: Dual Groove Feed Roller
Feed Roll Retaining Screw
Art # A-10428_AB
Figure 5-9: Changing the Feed Roll