This section covers the most common problems encountered during operation and what to do about them. Do not make any
adjustments until machine is unplugged and moving parts have come to a complete stop.
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Motor will not start; fuses or
circuit breakers blow
1, Short circuit in line cord or plug
2, Short circuit in motor or loose
connections.
3, Incorrect fuses or circuit break-
ers in power line.
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.
Motor stalls (resulting in blown
fuses or tripped circuit)
1, Short circuit in motor or loose
connections
2, Low voltage.
3, Incorrect fuses or circuit breakers
in power line.
4, Motor overloaded.
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.
Wavy condition on surface of
workpiece.
1, Machine
vibrating
2, Workpiece not being held firmly.
3, Wheel face uneven.
4, Wheel is too hard.
1, Make sure machines is securely mounted on
a solid surface.
2, Use a holding device to firmly retain the workpiece.
3, Dress the grinding wheel.
4. Use softer wheel, or reduce the feed rate.
Burning spots or cracks in the
workpiece.
1, Improper type of grinding wheel
2, Improper feed rate.
3, Coolant required.
1, Try a wheel which is softer style or a coarser grit.
2, Slow down the rate of movement of the workpiece
into wheel.
3, Introduce coolant by hand.
Wheel clogs and workpiece
shows burn marks
1, Wheel is too hard.
2, Feed rate too slow.
3, Bad wheel dress.
4. Coolant required.
1, Wheel too hard for the material being ground,
select softer bond.
2, Increase the rate of movement of the workpiece
into wheel.
3, Dress the wheel.
4, Introduce coolant by hand
Wheel dulls quickly, grit falls
off.
1, Depth of cut too great.
2, Wheel is soft.
3, Wheel diameter too small.
4, Bad wheel dress.
5, Defective wheel bonding.
1, Slow down the rate of movement of the workpiece
into wheel.
2, Wheel too soft for the material being ground, select
harder bond.
3, Replace the wheel.
4, Dress the wheel.
5, Consult manufacturer of grinding wheel.
Motor overheats.
1, Motor overloaded.
1, Reduce load on motor
Machine slows when operating 1, Depth of cut too great.
1, Slow down the rate of movement of the workpiece
into wheel.
Lines on surface of workpiece.
1, Impurity on wheel surface.
2, Workpiece not being held tightly.
1, Dress the grinding wheel.
2. Use a holding device to firmly retain the workpiece.
Motor will not start
1, Low voltage.
2, Open circuit in motor or loose
connections.
1, Check power line for proper voltage.
2, Inspect all lead connections on motor for loose
or open connections.
TROUBLESHOOTING
