Troubleshooting Guide
Power Feed Problems
6
6-5
WMdoc072919
Troubleshooting Guide
4.
Put the carriage forward/reverse switch into the forward position.
5.
Turn the feed rate dial through all speeds.
If the power feed motor runs smoothly at all speeds, the problem is a mechanical one
instead of an electrical one..
PROBLEM
CAUSE
SOLUTION
Power feed is jerky at low
speeds or does not move until
speed is above halfway mark.
Drum switch is dirty.
Clean drum switch and lubricate
with contact grease supplied by
Wood-Mizer.
Drum switch contacts are bad
Check that contacts are in good
condition and positively close cir-
cuit.
Components are loose or
wires are broken.
Replace or repair PC board.
Power feed is jerky when
shaft of feed rate dial is
moved back and forth.
Perform the variable speed
switch test.
If test fails, replace variable
speed switch; otherwise, see
Power feed is jerky, but power
feed motor runs properly at all
speeds.
Problem is mechanical.
Refer
Power feed motor overheats.
Track wiper is dragging.
Clean track wiper.
. Allow motor to cool before
restarting
Ground is not level.
Level mill with frame levels or a
carpenter's level. Allow motor to
cool before restarting.
Track roller bearing drag is
excessive.
Lubricate bearings; replace tight
bearings. Allow motor to cool
before restarting.
Lower track rollers are not
aligned properly.
Check stop clearance from lower
track rail. Allow motor to cool
before restarting.
Chain is dragging.
Adjust chain tension. Allow
motor to cool before restarting.
Ensure that chain is centered on
idler; Clean and lubricate chain;
Chain is improperly tensioned.
Adjust chain tension. Allow
motor to cool before restarting.
Power feed is binding.
Adjust belt tension; Check condi-
tion of belt, pulleys, bearings,
and sprocket; Check motor for
ground fault. Allow motor to cool
before restarting.