
10. INTERFACE SIGNALS
B–65162E/03
406
D During spindle position control (such as spindle orientation control),
the spindle may be clamped when a brake is applied. If the spindle is
clamped with a small displacement remaining, an excessive current
may flow through the motor in order to eliminate the displacement by
performing speed integral control. In this case, this signal can be used
to nullify speed integral control so as to prevent an excessive current
from flowing through the motor.
Spindle position control
Spindle clamped
Speed integral control signal INTGA
D If a very small synchronization error occurs between two spindles
when they are used to hold a workpiece in spindle synchronization, an
excessive current may flow through the motor in order to eliminate the
error by performing speed integral control. In this case, this signal can
be used to nullify speed integral control so as to prevent an excessive
current from flowing through the motor.
Spindle synchronization
Workpiece held
by two spindles
Workpiece held by two spindles (chucks closed)
Chucks closed
Speed integral control signal
10.4.14
Speed Integral Control
Signal (INTGA)