B-65292EN/03 INSTRUCTION 3.ROTOR
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3.2 ADJUSTING THE BALANCE
• After the rotor is mounted on a spindle (see section 3.3), balance
the entire spindle by separately installing balance rings. It is
recommended to use a Non-magnetic material like stainless steel
for the ring. If a magnetic material is used for the ring, keep
enough distance from the rotor to the ring, for example, more
than 20mm.
Balance weight area
for FANUC’s balancing
Balance ring
Balance ring
• Width about 20mm from the both side of the rotor are used for
balancing at FANUC. Be sure not to interfere with other parts, as
sometimes some balance weight is attached. Do not use the taps
on the rotor to balance the spindle.
• When you are going to rotate the motor at 8,000min
-1
or higher,
high precision balance adjustment is needed within 5cm×0.5g.
• Avoid machining on the rotor end ring.
For example, do not make a balancing
hole in it.