FAILURE – CAUSE - PREVENTION
Failure Cause Prevention
The shaft doesn’t
rotate freely.
- There is dirt or oil in
bearing gap
- Low air pressure
- Air bearings are
damaged after crash
- Check the air pressure and air
cleaner according to spec.
conditions
- Air pressure must be 5 Bar.
- Return the spindle to the
manufacturer for repair
The spindle getting
warm
- Low water flow
- High temperature of
income coolant
water
- Friction in the bearings
- Motor failure
- Driver failure
- Machine control failure
- Water flow 3 – 5 lpm.
- Water temperature 25C max.
- Return the spindle to the
manufacturer for repair.
- Return the spindle to the
manufacturer for repair.
- Return the driver to the
manufacturer for repair.
- Return the control unit
to the manufacturer for repair.
Spindle shaft
rotated too slowly
with the same
adjustment of
speed control unit
- Motor failure
- Friction in the bearings
- Control unit failure
- Driver failure
- Return the spindle to the
manufacturer for repair.
- Return the spindle to the
manufacturer for repair.
- Return the control unit
to the manufacturer for
repair.
- Return the driver to the
manufacturer for repair.
High vibration level - The shaft’s balancing
has changed
- Balance of wheel
mount was changed
- There is dirt on air
cover area of the shaft
- Check that spindle shaft is not
damaged
- Change the wheel mount
- Clean the air cover area of the
shaft from dirt
The shaft rotates
freely, but the
spindle does not
turn, vibrates or
turns too quickly.
- Motor failure
- Electrical connections
problem (see above)
- Return the spindle to the
manufacturer.
- Check electrical connections
The shaft rotates
freely, but after
starting it vibrates.
- Incorrectly connected
phases
- Connect phases according
to diagram.
Spindle shaft’s
speed is sharply
increased
immediately after
starting and in this
case it’s impossible
to adjust it.
- Incorrectly connected
phases
- Connect phases according
to diagram.
The shaft rotates
freely, but the
spindle does not
turn
- Incorrectly connected
phases
- Hall sensors are
incorrectly connected.
- Connect phases according
to diagram.
- Connect Hall sensors
correctly according to diagram
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