
B-63783EN-1/01 9.SPINDLE FUNCTION
- 825 -
- Orientation speed
When an analog spindle is used, the tool moves at the rapid traverse
rate set in parameter No. 5977 until a speed that allows orientation is
reached. After a one-rotation signal is detected, spindle orientation is
performed at the FL feedrate set in parameter No. 5979.
* Speed allowing orientation
Set the speed so that the following condition is satisfied:
F : Feedrate (deg/min)
G : Position gain (1/sec)
P : Gear ratio between the spindle and position coder
If the above condition is not satisfied, a one-rotation signal cannot be
detected, so movement continues at the rapid traverse rate.
* FL feedrate
Set the FL feedrate so that the following condition is satisfied:
FL : Feedrate (deg/min)
G : Position gain (1/sec)
P : Gear ratio between the spindle and position coder
If the above condition is not satisfied, an accurate stop position cannot
be detected, so orientation is performed again stating from the rapid
traverse operation.
The serial spindle stops at the orientation position as soon as the
command is issued. The lower limit to the rapid traverse speed value
does not need to be specified for the serial spindle to reach the
orientation enable speed.
The analog spindle stops after the spindle speed is changed from rapid
traverse to the FL speed. The rapid traverse speed lower limit must be
specified for the analog spindle, or obtaining the orientation enable
speed need not be specified for the serial spindle. However, it must be
specified for the analog spindle.
- Omitting an orientation operation
When reference position return is not required when performing
orientation (for example, when no start position is specified, and only
incremental positioning starting from the current position is needed),
the reference position return operation performed upon orientation can
be omitted by setting bit 0 (ZRN) of parameter No. 1005. In this case,
when an M code for orientation is specified, only change of the spindle
control mode is performed. Then, operation is completed without
reference position return.
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