Bedienungsanleitung Makita GB801 (Seite 9 von 80) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch, Polnisch)

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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.

TROUBLESHOOTING

SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

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.

Motor will not start; fuses or

circuit breakers blow

1. Short circuit inline cord or plug.

2. Short circuit in motor or loose

connections.

1. Inspect cord 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 overheats. Motor overloaded. Reduce load on motor.

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.

Machine slows when

operating.

Depth of cut is too great. Slow down the of rate of movement of the

workpiece into wheel.

Wavy condition on surface of

workpiece.

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.

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.

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

coarser grit.

2. Slow down the rate of movement of the

workpiece into wheel.

3. Add optional coolant system or

introduce coolant by hand.

Wheel dulls quickly, grit falls

off.

1. Depth of cut too great.

2. Wheel is too soft for the material being.

Select harder bond.

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 is too hard for the material

being. Select softer bond.

3. Replace the wheel.

4. Dress the wheel.

5. Consult manufacturer of grinding

wheel.

Wheel clogs and workpiece

shows burn marks.

1. Wheel is too hard.

2. Feed rate is too slow.

3. Bad wheel dress.

4. Coolant required.

1. Select softer bond.

2. Increase the rate of movement of the

workpiece into wheel.

3. Dress the wheel.

4. Add optional coolant system or

introduce coolant by hand.

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