Troubleshooting - Grizzly H2933 Instruction Manual

SYMPTOM
Motor will not start.
Motor will not start; fuses or
circuit breakers blow.
Motor overheats.
Motor stalls (resulting in
blown fuses or tripped cir-
cuit).
Machine slows when oper-
ating.
Loud, repetitious noise com-
ing from machine.
Machine is loud, overheats
or bogs down in the cut.
Rounded workpiece edges.
Uneven thickness from left
to right of board.
Workpiece slips on feed
belt.
Straight strip of notches on
workpiece.
Snake shaped marks on
workpiece.
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Troubleshooting

POSSIBLE CAUSE
1. Limit switch or emergency stop is
at fault.
2. Low voltage.
3. Open circuit in motor or loose con-
nections.
1. Short circuit in line cord or plug.
2. Short circuit in motor or loose con-
nections.
3. Incorrect fuses or circuit breakers
in power line.
1. Motor overloaded.
2. Air circulation through the motor
restricted.
1. Short circuit in motor or loose con-
nections.
2. Low voltage.
3. Incorrect fuses or circuit breakers
in power line.
4. Motor overloaded.
1. Feed rate too high.
2. Depth of cut too great.
1. Pulley set screws or keys are miss-
ing or loose.
2. Motor fan is hitting the cover.
3. V-belt is defective.
1. Excessive depth of cut.
2. Dull or dirty sanding belt.
1. Excessive depth of cut.
1. Feed table not parallel to sanding
roller.
2. Conveyor belt is worn.
1. Pressure rollers set too high.
2. Dirty conveyor belt.
3. Conveyor belt is worn.
1. Pressure rollers are dirty or dam-
aged.
1. Sanding belt damaged or dirty.
CORRECTIVE ACTION
1. Correct situation that caused limit switch to engage, reset the emer-
gency stop button.
2. Check power line for proper voltage.
3. Inspect all lead connections on motor for loose or open connec-
tions.
1. Inspect cord or plug for damaged insulation and shorted wires.
2. Inspect all connections on motor for loose or shorted terminals or
worn insulation.
3. Install correct fuses or circuit breakers.
1. Reduce load on motor.
2. Clean out motor to provide normal air circulation.
1. Inspect connections on motor for loose or shorted terminals or worn
insulation.
2 Correct the low voltage conditions.
3. Install correct fuses or circuit breakers.
4. Reduce load on motor.
1. Feed workpiece slower.
2. Reduce depth of cut.
1. Inspect keys and set screws. Replace or tighten if necessary.
2. Tighten fan or shim cover.
3. Replace V-belt. Refer to the Maintenance section.
1. Decrease depth of cut.
2. Replace or clean sanding belt.
1. Reduce depth of cut.
1. Adjust the table.
2. Replace conveyor belt.
1. Lower pressure rollers.
2. Clean conveyor belt.
3. Replace conveyor belt.
1. Clean or repair pressure rollers.
1. Clean or replace sanding belt.
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.
H2933/H2934/G0447/G0581 Wide Belt Sander