Mitsubishi Electric MELDAS C6 Programming Manual page 96

10. Spindle Functions
CAUTION
Do not make the synchronous spindle rotation command OFF with one workpiece
chucked by the basic spindle and synchronous spindle during the spindle
synchronous control mode.
Failure to observe this may cause the synchronous spindle stop, and hazardous
situation.
Precautions and restrictions
(1) To carry out the spindle synchronization, it is required to command spindle rotation for both
basic spindle and synchronous spindle. Note that the rotating direction of the synchronous
spindle follows the rotating direction of the basic spindle and rotating direction designation by
"D" address.
(2) The spindle rotating with spindle synchronous control will stop when emergency stop is
applied.
(3) The rotation speed clamp during spindle synchronization control will follow the smaller clamp
value set for the basic spindle or synchronous spindle.
(4) Orientation of the basic spindle and synchronous spindle is not possible during the spindle
synchronous control mode. To carry out orientation, cancel the spindle synchronous control
mode first.
(5) The rotation speed command (S command) is invalid for the synchronous spindle during the
spindle synchronous control mode. Note that the modal will be updated, so this will be
validated when spindle synchronous control is canceled.
(6) The constant surface speed control is invalid for the synchronous spindle during the spindle
synchronization control mode. Note that the modal will be updated, so this will be validated
when spindle synchronization is canceled.
(7) The rotation speed command (S command) and constant surface speed control for the
synchronous spindle will be validated when spindle synchronous control is canceled. Thus, the
synchronous spindle may carry out different operations when this control is canceled.
(8) An attention should be made that if the phase synchronization command is executed with the
phase error not obtained by the phase shift calculation request signal, the phase shift amount will
not be obtained correctly.
(9) 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 canceld.
(10) If the phase synchronization command (command with R address) is issued while the phase
shift calculation request signal is ON, an operation error (1106) will occur.
(11) If the phase shift calculation request signal is ON and the basic spindle or synchronous
spindle is rotation while rotation synchronization is commanded, an operation error (1106) will
occur.
(12) If the phase synchronization command R0 (<Ex.> G114.2 H1 D-2 R0) is commanded while
the phase offset request signal is ON, the basic spindle and synchronous spindle phases will
be aligned to the phase error of the basic spindle and synchronous spindle saved in the NC
memory.
(13) If a value other than the phase synchronization command R0 (<Ex.> G114.1 H1 D-2 R000) is
commanded while the phase offset request signal is ON, the phase error obtained by adding
the value commanded with the R address command to the phase difference of the basic
spindle and synchronous spindle saved in the NC memory will be used to align the basic
spindle and synchronous spindle.
10.7 Spindle synchronous control I
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