B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
145
(1) The BMI interface needs to be used when this function is used. (This
function cannot be used with the FS3/6 interface.)
(2) 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 synchronization control of spindle speed is in effect).
The signal indicating that synchronization control of spindle phase is
completed is output when the difference between the error pulses of
the two spindles does not exceed the number of pulses specified in
parameter 5810 of the NC function.
The positions of spindle phase synchronization for spindles one and
two can be specified in spindle parameters 3034 and 3174,
respectively.
The two spindles are not synchronized when synchronization control
of spindle phase is in progress (until the signal indicating that
synchronization control of spindle phase is completed is set to 1). The
command for spindle phase synchronization must not be issued while
a workpiece is being held with the two spindles.
If issued, synchronous control of spindle phase is started
automatically.
(3) PMC signal, SPSYAL is provided to monitor the synchronization
error between spindles for which spindle synchronization control or
synchronization control of spindle phase is in effect. The
synchronization error between the two spindles is always monitored.
The SPSYAL signal is set to 1 when the error (the absolute value of
the error pulse) specified in parameter 5811 of the 1st spindle is
exceeded, and set to 0 when not exceeded.
(4) When generated while spindle synchronization control or
synchronization control of spindle phase is in the process of being put
into effect, the signal specifying speed is used as the signal for
specifying the synchronization speed.
The signal for specifying the spindle speed can be generated like the
conventional spindle motor command which sends a voltage signal.
Signals RISGN and RI00 to RI12 are effective as usual.
The maximum spindle speed in synchronization control is
determined by the maximum speed of the motor of the 1st spindle
(parameter 3020).
[Example] Maximum speed of the motor of the 1st spindle
: 6000 min
–1
Maximum speed of the motor of the 2nd spindle
: 4500 min
–1
However, maximum speed in synchronization control is limited by
the maximum speed of the 2nd spindle. In the example above, the
maximum speed that can be specified by the 13-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
.
(5) The command for spindle phase synchronization is effective only in
spindle synchronization control mode.
(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 synchronization control of
spindle speed is completed may go off temporarily.
(7) Bit 0 and 1 of parameter PRM 5820 are used to set the direction of
rotation of the 1st spindle and 2nd spindle respectively.
2.6.10
Additional
Explanations of Series
15–TT