
5.FUNCTION DESCRIPTIONS FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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5.9.4 Description
(1) The position coder must be connected to the master side spindle
at the ratio of 1:1.
(2) The position coder signal from the master side received by the
sub module SW is output from JX4.
(3) Differential spindle speed control can be used only during speed
control mode or rigid tapping. It cannot be used during Cs
contouring control, spindle synchronous control, or spindle
orientation.
(4) When differential spindle speed control is applied to rigid
tapping (Differential speed rigid tapping), sum of the velocity of
master spindle and the velocity command of rigid tapping for
slave spindle must not exceed the maximum speed of slave
spindle.
(5) The master side spindle must be kept at a constant speed during
rigid tapping. Acceleration or deceleration cannot be performed.
(6) Since the output torque of the motor is normally reduced in
high-speed rotation areas, the rigid tapping
acceleration/deceleration constant must be set to a greater value.
5.9.5 I/O Signals (CNC↔PMC)
(1) Address list of input signals (PMC→CNC)
15
i 16i 30i
#7 #6 #5 #4 #3 #2 #1 #0
1st- G229 G072 G072
DEFMDA
2nd- G237 G076 G076
DEFMDB
(2) Details of input signals (PMC→CNC)
(a) Speed differential mode specification signal (DEFMDA)
This signal is used to specify whether differential spindle speed mode
is enabled.
0: Differential spindle speed mode disabled
1: Differential spindle speed mode specified
While this signal is set to 1, the spindle is controlled in differential
spindle speed mode.
The velocity of the slave axis in differential spindle speed mode is
controlled by the sum of the velocity of the master spindle and the
velocity command of the slave spindle.
(3) Output signals (CNC→PMC)
There are no output signals.