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Maintenance
Wide Belt Sander Belt Tracking
If the belt is tracking too far one-way or not
tracking at all.
Was the belt recently changed? Different grit,
manufacturer, backing, weight and construction
can effect how the belt tracks.
Check to see if any adjustments have recently
been made to the machine, if the #1 or #3 valves
have been adjusted to obtain correct belt
oscillation.
If the tracking piston needs to extend out faster
open (loosen) the #1 valve, if it needs to extend
slower the #1 valve needs to be closed (tighten). If
the piston needs to retract faster open (loosen) the
#3 valve, if it needs to retract slower close
(tighten) the #3 valve. The tracking piston should
always be moving in or out to achieve correct
oscillation.
If the conveyer is tracking too far in one
direction, the tracking screws need to be
adjusted.
If the belt will not or is continuously
1. If the belt is tracking too far to the right.
tracking to the right:
(Reverse the sides if tracking too far to the
1. The first thing to do is to make sure the photo
eye, and photo eye reflector are free of debris.
Wipe off both the eye and reflector.
2. Check to see if the photo eye is working, to do
this remove the belt, and turn the machines air
on. If the tracking piston is protruded it can
mean two things; either the photo eye does not
work or it is not aimed at the reflector, make
sure the eye is aimed at the reflector and that
the reflector is clean. (Make sure that the
motor is OFF) Next, check if the photo eye
solenoid is working. To do this turn the air to
the machine on and cover the photo eye with
something. If the solenoid is working properly
the solenoid will make a (clicking) noise and
the tracking piston shaft will extend outward.
If nothing happens it can mean the solenoid
may not work.
If the belt will not or is continuously
tracking to the left:
3. The first thing to do is to make sure the photo
eye, and photo eye reflector is free of debris.
Wipe off both the eye and reflector.
4. Verify the rotation of the sanding belt. It
should be turning counter clockwise if looking
at it from the loading door. If it is turning
clockwise flip the two low leg wires around
on the three-phase motor.
left.)
a. Loosen the left tension screw exactly 5
turns. (Has to be exact, before starting to
turn note where the wrench is.)
b. When the belt tracks back to the middle,
tighten the left tension screw exactly 5
turns.
Tighten the right tension screw 1/4 turn and watch
the belt for 5 minutes. After the 5 minutes adjust
accordingly, but only tighten or loosen a
maximum of a 1/4 turn at a time and watch for 5
minutes in between each adjustment. Do not over
tighten the bolts, if needed loosen the other side.
Over tightening can cause stress on conveyer belt,
stripping of the screws, or destruction of the
conveyer.