Mitsubishi Electric MELDAS C6 Programming Manual page 104

10. Spindle Functions
Precautions and restrictions
(1) When carrying out spindle synchronization, a rotation command must be issued to both the
basic spindle and synchronous spindle. The synchronous spindle's rotation direction will
follow the basic spindle rotation direction and spindle synchronization rotation direction
designation regardless of whether a forward or reverse run command is issued.
(2) The spindle synchronization control mode will be entered even if the spindle synchronization
control signal is turned ON while the spindle rotation speed command is ON. However,
synchronous control will not actually take place. Synchronous control will start after the rotation
speed is commanded to the basic spindle, and then the spindle synchronization complete signal
will be output.
(3) The spindle rotating with spindle synchronization control will stop when emergency stop is
applied.
(4) An operation error will occur if the spindle synchronization control signal is turned ON while
the basic spindle and synchronous spindle designations are illegal.
(5) The rotation speed clamp during spindle synchronization control will follow the smaller clamp
value set for the basic spindle or synchronous spindle.
(6) Orientation of the basic spindle and synchronous spindle is not possible during the spindle
synchronization. To carry out orientation, turn the spindle synchronization control signal OFF
first.
(7) The rotation speed command is invalid for the synchronous spindle during the spindle
synchronization. Note that the modal is rewritten, thus, the commanded rotation speed will be
validated after spindle synchronization is canceled.
(8) The constant surface speed control is invalid for the synchronous spindle during the spindle
synchronization. However, note that the modal is rewritten and it will be valid after spindle
synchronization is canceled.
(9) If the phase offset request signal is turned ON before the phase shift is calculated and then
spindle phase synchronization is executed, the shift amount will not be calculated and
incorrect operation results.
(10) The spindle rotation speed command (S command) and the constant surface speed control for
the synchronous spindle will become valid when the spindle synchronous control is canceled.
Thus, special attention should be made because the synchronous spindle may do different
action than before when the spindle synchronous control is canceled.
(11) The spindle Z-phase encoder position parameter (sppst) is invalid (ignored) when phase
offset is carried out.
This parameter will be valid when the phase offset request signal is OFF.
(12) If spindle phase synchronization is started while the phase shift calculation request signal is
ON, the error "M01 OPERATION ERROR 1106" will occur.
(13) Turn the phase shift calculation request signal ON when the basic spindle and synchronous
spindle are both stopped. If the phase shift calculation request signal is ON while either of the
spindles is rotating, the error "M01 OPERATION ERROR 1106" will occur.
(14) The phase offset request signal is ignored when the phase shift calculation request signal
(Y435) is ON.
(15) "M01 OPERATION ERROR 1106" will occur when a spindle No. out of specifications is
designated in the R registers to set the basic spindle and the synchronous spindle, or when
the spindle synchronous control signal (Y432) is turned ON with R resister value illegal.
(16) The phase shift amount saved in the NC is held until the next phase shift is calculated. (This
value is saved even when the power is turned OFF.)
(17) Synchronous tapping can not be used during spindle synchronous mode.
10.8 Spindle synchronization control II
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