Feed Roll Pressure Adjustment; Changing The Feed Roll - Thermal Arc Fabricator 211i Service Manual

INSTALLATION/SETUP

4.07 Feed Roll Pressure Adjustment

The pressure (top) roll applies pressure to the grooved feed roll via an adjustable pressure knob. 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 knob clockwise.
Before changing the feed roll ensure that the Electricity Supply to the power source is switched off.
The use of excessive pressure may cause rapid wear of the feed rolls, shafts and bearing.

4.08 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.
Be sure not to lose key that is located on Drive Motor Shaft. This key must align with drive roll groove for
proper operation.
A dual groove feed roll is supplied as standard. It can accommodate 0.6/0.8mm diameter hard wires. Select the roll
required with the chosen wire size marking facing outward.
Manual 0-5158
NOTE
GROOVE "A"
GROOVE "B" SIZE
Figure 4-11: Dual Groove Feed Roll
Art # A-10428
Figure 4-12: Changing the Feed Roll
4-13
WARNING
CAUTION
GROOVE "B"
GROOVE "A" SIZE
A-09583
Feed Roll Retaining Screw
FABRICATOR 211i
INSTALLATION/SETUP