
FANUC AC SPINDLE MOTOR a series
2. FUNCTION EXPLANATION
B–65160E/02
142
However, the maximum speed during synchronization control is
limited by the maximum speed of the 2nd spindle motor. In the
example above, the maximum speed that can be specified by the
12-bit speed command is 6000 min
–1
for the 1st spindle. However,
if 6000 min
–1
is specified in synchronization control, an overspeed
alarm is issued from the 2nd spindle. The spindle speed specified by
the command must not exceed 4500 min
–1
.
(4) The S command for the 1st spindle and the PMC control signal for
spindle control become effective when issued before spindle
synchronization control or synchronization control of spindle phase
are put into effect. The S command issued in synchronization control
becomes effective for the 1st spindle immediately after
synchronization control is canceled.
(5) In the usual mode of spindle rotation control, spindle speed can be
controlled by the PMC function when the following conditions are
satisfied: The SIND signal is set to 1 and the SSIN, SSGN, and R01I
to R12I signals are provided. When spindle synchronization control
is in the process of being put into effect, something other than the
R01I to R12I signals is required to control the spindle speed in
synchronization. The maximum spindle gear speed must be properly
set in parameters 540, 541, 542, and 543. When the value set in the
parameter corresponding to the selected gear is 0, the rotations of the
spindles are not synchronized even if a command is entered in the
12-bit signal of the SIND signal.
(6) The load may change due to cutting (or threading). When the load
changes in spindle synchronization control, the spindle speed may
change and the signal indicating that the synchronization control of
spindle speed is completed may go off temporarily.
(7) Parameters PRM 0080, #6 and #7 are used to set the direction of
rotation of the 1st spindle and 2nd spindle, respectively.
Parameter PRM 0080 #6 or #7=”0” Counterclockwise (CCW)
Parameter PRM 0080 #6 or #7=”1” Clockwise (CW)
(8) The gear ratio of the spindle to the position coder must be set to
one-to-one.
(9) In spindle synchronization control, the compensation value for
spindle speed offset (parameter 516) is disabled.
(10)Alarm
The following alarm may be issued in spindle synchronization control.
P/S alarm
Alarm number Description
194 A command for Cs contouring control, spindle indexing,
or rigid tapping was issued in spindle synchronization
control.
(1) Synchronization control of spindle phase is executed when the signal
for controlling the spindle phases in synchronization is entered in
spindle synchronization control mode (after output of the signal
indicating that the synchronization control of spindle speed has been
completed).
The signal indicating that the synchronization control of spindle
2.6.9
Additional
Explanations of Series
0–TT