
11.SPINDLE SPEED FUNCTION B-63943EN-1/02
- 1504 -
NOTE
4 Do not specify a reference position return operation
in the Cs contouring control mode or a spindle
orientation operation in the spindle positioning
mode while the two spindles are placed in the
parking state. When the two spindles are placed in
the parking state, the reference position return
operation cannot be completed.
5 When using parking signal PK7 or PK8 for spindle
synchronous control while both simple spindle
synchronous control and spindle synchronous
control are being used, set the SPK bit (bit 7 of
parameter No. 4800) to 1. This sets parking signals
PKESS1 and PKESS2, used for simple spindle
synchronous control, to #6 and #7 of G031.
- Simple spindle synchronization and phase error monitor signal
Simple spindle synchronous control does not guarantee synchronous
spindle operation. In spindle control involving a position loop as in
the case of Cs contouring control, rigid tapping, and spindle
positioning, however, the synchronous state of the two spindles can be
maintained by matching the position gains of the two spindles.
For monitoring of the synchronous state of two spindles in such a case,
the phase error monitor signal SYCAL is available. The error between
two spindles is monitored at all times. When a synchronization error
exceeding the value set in parameter No. 4826 is detected, this signal
is set to 1. When a synchronization error not exceeding the value set in
parameter No. 4826 is detected, this signal is set to 0.
In the spindle rotation control mode, however, synchronous state
monitoring is not performed. So, the phase error monitor signal has no
effect, and is set to 0 at all times.
Note that even if phase error monitor signal SYCAL is output, no
CNC alarm is issued. This signal is designed to be used by the PMC to
monitor the machine synchronization state. Its usage varies depending
on the machine tool builder. The use of this signal is not mandatory.
NOTE
During simple spindle synchronous control, a
reference position return operation in the Cs
contouring control mode, a spindle orientation
operation in the spindle positioning mode, or a
function (such as spindle orientation) that is directly
specified for a spindle with a PMC signal is
performed for each spindle independently, so that
synchronization is not guaranteed.