17 inserting wire into feed mechanism, 18 feed roll pressure adjustment, Inserting wire into feed mechanism -29 – Tweco VAF4HD Transmig User Manual
Page 47: Feed roll pressure adjustment -29, Transmig vaf4hd
TRANSMIG VAF4HD
Manual 0-5269
3-29
INSTALLATION, OPERATION AND SETUP
3.17 Inserting Wire into Feed Mechanism
WARNING
ELECTRIC SHOCK CAN KILL! Make certain the input power is disconnected from the power source
before proceeding. Do not reattach the input power until told to do so in these instructions.
WARNING
MOVING PARTS can cause injury.
1. Swing the Pressure Adjusting Knobs down and the two Pressure Roll Arms automatically spring up.
2. Make sure the end of the wire is free of any burrs and is straight. Pass the end of wire through the Inlet
Guide and over the Feed Rolls. Make certain the proper groove is being used.
3. Pass the MIG wire over the feed roll groove and out past the MIG Torch Adaptor. Then fit the welding torch
as per Subsection 3.10 ensuring the MIG wire passes into the MIG Torch liner of the MIG Torch.
4. Lower the Pressure Roll Arms.
5. Swing the Pressure Adjusting Knobs back into place.
6. Use the Pressure Adjusting Knobs to create a “snug” condition. (Clockwise to tighten and Counter Clockwise
to loosen).
7. Turn ON the power supply. Set proper WFS and remove the tip from the welding torch. Depress INCH
button until the wire reaches the top of welding torch. Tighten the tip again and finish inserting wire.
Pressure Roll Arm
Pressure Adjusting Knob
Inlet Guide
Feed Roll
Pressure Roll
Art # A-11778
Figure 3-29 Wire Feeding
3.18 Feed Roll Pressure Adjustment
The roll on the swing arm applies pressure to the grooved roll via an adjustable tension device. The pressure
adjusting knob should be set to a minimum pressure that will provide satisfactory wire feed without slippage. If
slipping occurs, and inspection of the wire out of the MIG Gun reveals no deformation or wear, the conduit liner
should be checked for kinks or clogging from metal flakes. If this is not the cause of slipping, the Feed Roll pres-
sure can be increased by rotating the pressure adjusting knobs clockwise. The use of excessive pressure may
cause rapid wear of the Feed Roll, motor shaft and motor bearings.