
B--63003EN--1/02
9. SPINDLE SPEED FUNCTION
897
NOTE
1 The second spindle is initialized to Cs contour axis control
mode. At this time, the position of the second spindle will
be undefined, so that reference position return must be
performed for the first and second spindles. In this case, the
reference position return command that is usually used can
be applied. (See Section 9.9.)
2 While the first spindle is in rigid tapping mode or spindle
positioning mode, the input of simple spindle synchronous
control signal ESRSYC is masked in the NC to prevent the
setting of simple spindle synchronous control mode. When
the first spindle is initialized to spindle mode or Cs contour
axis control mode after the cancellation of rigid tapping
mode or Cs contour axis control mode, the second spindle
enters simple spindle synchronous control mode, and is
initialized together with the first spindle. After simple spindle
synchronous control mode has been set, initialization to
rigid tapping mode or spindle positioning mode, command
specification, and cancellation are performed for both the
first and second spindles.
3 The mode is not changed. The second spindle, however,
is initialized to spindle mode. After being initialized to
spindle mode, the second spindle operates according to
commands issued for the second spindle, such that the
feedrate may change.
4 The second spindle is immediately initialized to spindle
mode, regardless of its previous mode. The state of the first
spindle, however, remains as is.
In simple spindle synchronous control mode, the same output and move
commands are issued to both the first and second spindles.
When one spindle is to rotate in the opposite direction to that of the other
spindle, the direction of rotation can be reversed by using a PMC signal
(SFR or SRV signal) or serial spindle parameter according to the currently
set mode.
When simple spindle synchronous control is exercised in a mode other
than spindle mode, feedback information relating to the first and second
spindles is monitored for positional deviation. That is, an in--position
check is made, and an excess error check is made upon stop and move.
The usually specified parameter is used for both spindles.
Moreover, upon the issue of an alarm to indicate the occurrence of an
error, no distinction is made between the first and second spindles, the
alarm being issued as a first spindle alarm.
D Spindle rotation
direction
D Error monitoring a nd
alarm display