Grizzly G9962Z - Manual (Page 43)

G0445/G0582/G9962Z/9962ZX Wide Belt Sander -41-
Troubleshooting
SYMPTOM
Snake shaped marks on
workpiece.
Lines across width of work-
piece.
Glossy spots or streaks on
workpiece.
Sanding belt clogs quickly.
Sanding belt does not ten-
sion correctly; rollers pad
under belt.
Sanding belt runs off to one
side, stopping the sander.
Sanding belt will not start.
Poor, non-aggressive sand-
ing results.
Conveyor belt not tracking
in center.
Conveyor belt padping.
Emergency brake stops
slow.
Grinding noise when brak-
ing.
POSSIBLE CAUSE
1. Sanding belt damaged or dirty.
1. Sanding belt seam is open or dam-
aged.
1. Worn sanding belt.
2. Rear pressure roller too low.
1. Sanding belt grit too small for par-
ticular job.
2. Excessive depth of cut.
3. Wood is too moist.
4. Dust Collection is at fault.
1. Low air pressure.
2. Air leaks in system.
1. Air eye fork clogged.
2. Oscillation return valve closed.
3. Oscillation timing incorrect.
1. Sanding belt is not tensioned.
2. Limit switches engaged.
3. Emergency stop plate engaged.
1. Worn sanding belt.
2. Sanding belt loaded with sawdust.
1. Conveyor rollers moved out of
adjustment.
1. Conveyor rollers have incorrect
tension.
2. Conveyor rollers contaminated with
dirt or dust.
1. Air pressure incorrect.
2. Air leak in system.
3. Brake rotor contaminated with oil.
4. Brake pads worn out.
1. Brakes severely worn out.
CORRECTIVE ACTION
1. Clean or replace sanding belt.
1. Replace sanding belt.
1. Replace sanding belt.
2. Raise rear pressure roller.
(See warning in Pressure Roller sec-
tion!)
1. Replace with a coarser grit sanding belt.
2. Reduce depth of cut.
3. Allow wood to dry out.
4. Service dust collection system or dust collector is undersized.
1. Adjust air pressure to 75 PSI at primary regulator.
2. Inspect all hoses and connections for leaking air; use water on sus-
pected area to detect bubbles.
1. Clean the intake hole on the air eye fork.
2. Open valve.
3. Adjust oscillation timing.
1. Tension sanding belt.
2. Center sanding belt so it is not touching the limit switches.
3. Make sure emergency stop switch is released.
1. Replace sanding belt with a new one.
2. Clean sanding belt to unload sawdust.
1. Re-adjust conveyor rollers.
1. Adjust conveyor rollers to place more tension on the workpiece.
2. Clean conveyor rollers.
1. Adjust air pressure to 75 PSI.
2. Find and fix air leaks.
3. Clean brake rotor with automotive brake parts cleaner.
4. Replace brake pads.
1. Replace brake pads, have rotor turned (possibly replaced).
For your safety, turn the
power switch off and dis-
connect the sander from the
power source and the air
supply before starting the
applicable troubleshooting.