
B-63323EN-1/03 9.SPINDLE FUNCTION
- 875 -
Connection Among Spindle, Spindle Motor, and Position Coder
As shown in the figure below a gear can be inserted between the
spindle and spindle motor (n:m), and between the spindle and position
coder (N:M).
- Gear between spindle and spindle motor
An arbitrary gear ratio can be used. The spindle travel distance per
spindle motor rotation, however, varies depending on the gear ratio, so
that feedrate instructed to the spindle motor must be adjusted
accordingly.
When a serial spindle is used, the gear ratio is set in parameter Nos.
3056 to 3059.
- Gear between spindle and position coder
The position coder is used to detect the position of the spindle.
The position coder is used to detect the position of the spindle. Gearing
of up to eight stages for an analog spindle or up to four stages for a
serial spindle can be installed between the spindle and spindle motor.
The gear ratio between the spindle and position coder is set in
parameter Nos. 5851 to 5873.
Spindle
control
Spindle
amplifier
Spindle motor
Spindle
Gear ratio n:m
Error
counter
Gear ratio N:M
Position
coder
The number of pulses per position coder rotation is
set in parameter No. 5842.