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 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
- Friction in the bearings
- Motor failure
- Driver failure
- Machine control failure
- 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
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 it is
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
- Connect phases according
to diagram.
The shaft rotates in air
bearings, but not
freely, in this case air
pressure is normal.
- Air ventilation hole (AO)
of spindle is closed by
dirt, or sealed, or used
small inlet pipe to air out,
or this pipe is damaged.
- Check spindle’s air outlet
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