Lincoln Electric SVM154-A Service Manual page 66

F-21
TACH ADJUSTMENT AND FEEDBACK TEST (continued)
TACH ADJUSTMENT
PROCEDURE
Proper positioning of the module is critical
to the proper operation the LN-10 wire feed-
er. If the device is not screwed in far
enough the motor speed could be unstable
or run at full speed with no control. If
screwed in too far it will rub a moving part
inside the gearbox.
1. Remove input power to the LN-10 wire
feeder.
2. Make sure the module is securely
attached to the gearbox.
TROUBLESHOOTING AND REPAIR
3. Using the 9/16 in. wrench loosen the
locking nut.
4. Gently screw the hall effect module into
the mounting plate until it just touches
and stops against the rotating part
inside the gearbox. See Figure F.2A.
5. Back the module out 1/2 turn. Using the
9/16 in. wrench and carefully snug the
lock nut without rotating the module
position. See Figure F.2A.
6. Install the wire drive cover.
LN-10
F-21