
B–62073E–1/042. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(10)When the
*SECLP signal is turned off, the control unit turns off spindle clamp signal SCLP and
notifies that the
*SECLP signal has been received.
(11)When the SCLP signal is turned off, the PMC turns on spindle clamp completion signal
*SECLP.
(12)Finally, the PMC turns on completion signal FIN for miscellaneous function strobe signal MF.
Next, the control unit turns off strobe signal MF, then the PMC turns off the FIN signal.
This completes the sequence for positioning the spindle in the spindle positioning mode.
The following time chart shows the above sequence:
Time chart for positioning the spindle in the spindle positioning mode
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
M command ( independent ) Myy
Strobe signal MF
Spindle stop check signal SPSTP
Spindle position control
Spindle position control Servo-ON
Spindle unclamp signal SUCLP
Spindle unclamp completion signal *SEUCL
Spindle rotation
Spindle clamp signal SCLP
Spindle clamp completion signal *SECLP
Auxilary function completion signal FIN
3) Exiting the spindle positioning mode and entering the spindle turning mode
Use an Mzz command to exit from the spindle positioning mode and enter the spindle turning mode. Num-
ber zz can be set in a parameter.
(1) Mzz is specified in a program.
(2) Miscellaneous function code signals M0 to M31 are output and miscellaneous function strobe signal
MF is turned on. These operations are the same as those of the ordinary miscellaneous function.
(3) When strobe signal MF is turned on, the PMC reads the code signals and checks value zz indicated
by the code signals. The PMC does not turn on completion signal FIN for miscellaneous function
strobe signal MF until the procedure is completed. When the spindle is stopped, the PMC turns on
spindle stop check signal SPSTP.
(4) The control unit checks if spindle stop check signal SPSTP is on, immediately after turning on strobe
signal MF. If the SPSTP signal is on, the control unit turns on spindle unclamp signal SUCLP.
(5) When the SUCLP signal is turned on, the PMC unclamps the spindle. After the spindle is unclamped,
the PMC turns off spindle unclamp completion signal
*SEUCL.
(6) When the
*SEUCL signal is turned off, the control unit turns off spindle unclamp signal SUCLP and
notifies that the
*SEUCL signal has been received.
(7) When the SUCLP signal is turned off, the PMC turns on spindle unclamp completion signal
*SEUCL.
After turning off the SUCLP signal, the control unit changes the mode of the spindle control unit from
position control to spindle control.
(8) 8 Finaly, the PMC turns on completion signal FIN for miscellaneous function strobe signal MF. Next,
the control unit turns off strobe signal MF, then the PMC turns off the FIN signal.
This completes the sequence for exiting the spindle positioning mode and entering the spindle turning
mode.