
B-63323EN-1/03 9.SPINDLE FUNCTION
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Spindle speed range (normal machining)
Gear
Lower limit Upper limit
Low-
speed
gear
1 revolution Maximum low-speed gear speed
Maximum spindle motor speed×L%
=
Low-speed gear ratio
Medium
speed
gear
Maximum low-speed
gear speed + 1
revolution
Maximum medium-speed gear speed
Maximum spindle motor speed×L%
=
Medium speed gear ratio
High-
speed
gear
Maximum medium-
speed gear speed +1
revolution
Maximum high-speed gear speed
Maximum spindle motor speed×L%
=
High-speed gear ratio
NOTE
This table shows an example of three gears. L%
indicates a spindle motor protection constant (up to
100).
Set the spindle speed range for each gear during rigid tapping as listed
in the table below.
Spindle speed range (during rigid tapping)Gear
Lower limit Upper limit
Low-
speed
gear
1 revolution Maximum low-speed gear speed
Basic spindle motor speed + α
=
Low-speed gear ratio
Medium
speed
gear
Maximum low-speed
gear speed + 1
revolution
Maximum medium-speed gear speed
Basic spindle motor speed + α
=
Medium speed gear ratio
High-
speed
gear
Maximum medium-
speed gear speed +1
revolution
Maximum high-speed gear speed
Basic spindle motor speed + α
=
High-speed gear ratio
NOTE
This table show an example of three gears. For the
basic spindle motor speed, refer to the spindle motor
description manual. "+α" means that the spindle
motor speed may slightly exceed the basic spindle
motor speed.