
B-63494EN/02 11.APPLYCATION OF OTHER FUNCTIONS
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11.5 Cs CONTOUR CONTROL
11.5.1 Overview
The dual check safety function uses the CNC CPU and spindle DSP to
separately monitor the actual speed of the spindle (safe speed
monitoring function). When the stop status of the spindle is monitored
by the safe speed monitoring function, set the safe speed parameter to
a value including a margin appropriate for the machine instead of 0
because the actual speed cannot be assumed to be 0. Since the spindle
may rotate at a speed less than the set safe speed in this case, it is
necessary to position the spindle with a position control loop formed
at the same time.
The Cs contour control function makes spindle positioning control
(spindle contour control).
When Cs contour control is performed, the configuration of the
spindle detector is restricted. For details, refer to the FANUC AC
SPINDLE MOTOR αi series Parameter Manual or other documents.
The Cs contour control function is optional, which cannot be used
together with the spindle positioning function. When options of both
functions are specified, the spindle positioning function is given a
higher priority.