
B-63944EN/02 PROGRAMMING 9.SPINDLE SPEED FUNCTION (S FUNCTION)
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9.4 SPINDLE POSITIONING FUNCTION
Overview
In turning, the spindle connected to the spindle motor is rotated at a
certain speed to rotate the workpiece mounted on the spindle. This
spindle control status is referred to as spindle rotation mode.
The spindle positioning function turns the spindle connected to the
spindle motor by a certain angle to position the workpiece mounted on
the spindle at a certain angle. This spindle control status is referred
to as spindle positioning mode.
The spindle positioning function involves the following three
operations:
1. Canceling the spindle rotation mode and entering the spindle
positioning mode
Place the spindle in the spindle positioning mode and establish a
reference position by specifying a given M code (set with a
parameter). (Spindle orientation)
2. Positioning the spindle in the spindle positioning mode
The spindle is positioned in either of the two methods:
1) Positioning with an arbitrary angle by an axis address
2) Positioning with a semi-fixed angle by a given M code (set
with a parameter)
3. Canceling the spindle positioning mode, and entering the spindle
rotation mode
Place the spindle in the spindle rotation mode by specifying a
given M code (set with a parameter).
The least command increment, least input increment, and maximum
value for the spindle positioning axis are as follows:
• Least command increment
• Least input increment
0.001 deg (IS-B)
• Maximum value
±999999.999 deg
360
4096
= 0.088 deg (when the gear ratio of the spindle to the position coder
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