Maintanance; Troubleshooting - KNOVA KN 7060 Manual

mAINTENANCE
Maintenance Required
1. Check power cord
2. Check wheels for cracks
3. Check moving parts for alignment
and binding issues
4. Dress Grinding Wheels
5. Replace Grinding Wheels
(see manual section for specifics)
6. Clean and vacuum dust from the motor
housing and other grinder parts
7. Replace work-light bulb

TrOuBLEShOOTING

Service on these tools should only be performed by an authorized, qualified technician.securely.
SYMPTOM
Motor will not start. 1. Low Voltage.
2. Open circuit in moto
3. Blown fuse or breaker.
1. Short circuit in line,
Motor will not
start – fuses or
circuit breakers
2. Short circuit in motor
tripping or blowing.
3. Incorrect fuses or circuit
Motor overheats.
1. Motor overloaded.
2. Extension cord too long and
1. Short circuit in motor
Motor stalls
(resulting in blown
fuses or tripped 2. Low voltage.
circuit).
3. Incorrect fuses or circuit
4. Motor overload.
1. Feed rate too great.
Machine slows
when operating.
1. Machine vibrating.
Wavy condition
on surface of
2. Workpiece not being
workpiece.
3. Wheel face uneven.
4. Wheel is too hard.
Lines on surface 1. Impurity on surface of wheel.
of workpiece.
2. Workpiece not being
1. Improper type of grinding wheel.
Burning spots
2. Improper feed rate.
or cracks in the
workpiece.
3. Coolant required.
Frequency
Before each use.
Before each use.
Before each use.
As needed.
As needed.
As needed.
As needed.
PROBABLE CAUSE
or loose connections.
cord or plug.
or loose connections.
breakers in power line.
of insufficient gauge (weight).
or loose connections.
breakers in power line.
held firmly.
held tightly.
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.
CORRECTIVE ACTION
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.
5
Collant tray