KNOVA KN 7060, Руководство пользователя

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5
mAINTENANCE
TrOuBLEShOOTING
Maintenance Required Frequency
1. Check power cord Before each use.
2. Check wheels for cracks Before each use.
3. Check moving parts for alignment
and binding issues Before each use.
4. Dress Grinding Wheels As needed.
5. Replace Grinding Wheels
(see manual section for specifics) As needed.
6. Clean and vacuum dust from the motor
housing and other grinder parts As needed.
7. Replace work-light bulb As needed.
Service beyond recommended maintenance on these tools should
only be performed by an authorized, qualified technician.
COOLANT TRAY
When grinding, metal objects
become heated quickly. It is
important to keep moving the
object back and forth across
the face of the grinding wheel
and to cool the object
frequently using the coolant
tray.
Collant tray
Service on these tools should only be performed by an authorized, qualified technician.securely.
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
1. Low Voltage.
2. Open circuit in moto
or loose connections.
3. Blown fuse or breaker.
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. Motor overloaded.
2. Extension cord too long and
of insufficient gauge (weight).
1. Short circuit in motor
or loose connections.
2. Low voltage.
3. Incorrect fuses or circuit
breakers in power line.
4. Motor overload.
1. Feed rate too great.
1. Machine vibrating.
2. Workpiece not being
held firmly.
3. Wheel face uneven.
4. Wheel is too hard.
1. Impurity on surface of wheel.
2. Workpiece not being
held tightly.
1. Improper type of grinding wheel.
2. Improper feed rate.
3. Coolant required.
Motor will not start.
Motor will not
start – fuses or
circuit breakers
tripping or blowing.
Motor overheats.
Motor stalls
(resulting in blown
fuses or tripped
circuit).
Machine slows
when operating.
Wavy condition
on surface of
workpiece.
Lines on surface
of workpiece.
Burning spots
or cracks in the
workpiece.
1. Check power source for proper voltage.
2. Inspect all lead connection on motor for loose or open
connections. (Send for Servicing.)
3. Short circuit. (Send for Servicing.)
4. Improper match between tool and circuit, fuse or breaker.
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.
1. Reduce load on motor.
2. Utilize an extension cord of appropriate gauge
and length or plug tool directly into outlet.
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.
1. Reduce the rate at which the workpiece is fed into
the working area of the tool (grinding wheel).
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.
1. Dress the grinding wheel.
2. Use a holding device to more firmly retain the workpiece.
1. Try wheels with softer bond or coarser grit.
2. Slow down the rate at which the workpiece is fed into the wheel.
3. Introduce coolant.