Tweco 181i Thermal Arc Fabricator - Manual (Page 48)

Fabricator 181i
INSTALLATION, OPERATION AND SETUP 3-18 Manual 0-5191
Art # A-10359
Outlet Guide
Inlet Guide
Wire Drive Tension Screw
Pressure Roller Arm
Figure 3-11: Wire Drive Assembly Components
MIG Welding Wire Art # A-10360 Figure 3-12: MIG Welding Wire - Installation
3.16 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 Electricity 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.