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Motor will not start – fuses
or circuit breakers tripping
or blowing.
1. Short circuit in line, cord or
plug.
2. Short circuit in motor or loose
connections.
3. Incorrect fuses or circuit
breakers 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
and/or worn insulation.
3. Install correct fuses or circuit
breakers or switch tool to an
appropriately sized circuit.
Motor overheats.
4. Motor overloaded.
5. Extension cord too long and of
insufficient gauge (weight).
4. Reduce load on motor.
5. Utilize an extension cord of
appropriate gauge and length or
plug tool directly into outlet.
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 overload.
1. Inspect connections on motor for
loose or shorted terminals or
worn insulation.
(Send for
Servicing.)
2. Correct low voltage conditions
(for example: improper extension
cord length and/or gauge).
3. Install correct fuses or circuit
breakers or plug tool into an
appropriate circuit, matched to
an appropriate fuse or breaker.
4. Reduce the load on the motor.
Machine
slows
when
operating.
1. Feed rate too great.
1. Reduce the rate at which the
workpiece is fed into the working
area of the tool (grinding wheel).
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. Ensure machine 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.
Lines
on
surface
of
workpiece.
1. Impurity on surface of wheel.
2. Workpiece not being held
tightly.
1. Dress the grinding wheel.
2. Use a holding device to more
firmly retain the workpiece.
Burning spots or cracks in
the workpiece.
3. Improper type of grinding
wheel.
4. Improper feed rate.
5. Coolant required.
3. Try wheels with softer bond or
coarser grit.
4. Slow down the rate at which the
workpiece is fed into the wheel.
5. Add coolant.
Wheel dulls quickly, grit
falls off.
6. Feed rate is too aggressive.
7. Wheel is soft.
8. Wheel diameter too small.
9. Bad wheel dressing.
10. Defective wheel bonding.
6. Decrease feed rate of workpiece
into grinding wheel.
7. Select a grinding wheel with a
harder bond of material.
8. Replace wheel.
9. Dress the wheel.
10. DO NOT USE – return wheel to
point of purchase.
Wheel clogs and workpiece
shows burn marks.
11. Wheel is too hard.
12. Feed rate is too slow.
13. Bad wheel dressing.
14. Coolant required.
11. Select a grinding wheel with a
softer bond of material.
12. Increase the feed rate of the
workpiece into the grinding
wheel.
13. Dress the wheel.
14. Add coolant.
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