Tweco VAF4 Transmig - Manual (Page 49)

TRANSMIG VAF4
Manual 0-5231 3-31 INSTALLATION, OPERATION AND SETUP
3.16 Wire reel Brake
The wire reel hub incorporates a 3-lobe screw which is adjusted during manufacture for optimum braking.
If it is considered necessary, adjustment can be made by turning the 3-lobe 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. Please refer to Figure 3-31.
Retaining Clip
Alignment Pin
Wire Spool Hub
3-lobe Screw
Art # A-11264_AB
Figure 3-31 Spool Hub Assembly (with spool hub assembly installed)
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.
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 Input
Wire 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.