
9.SPINDLE FUNCTION B-63323EN-1/03
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9.6 SPINDLE POSITIONING
General
This function positions the spindle using the spindle motor and position
coder.
The function has a coarser least command increment compared with
the Cs contour control function and has no interpolation capability with
other axes. However, it can be installed with ease because the position
detector is a position coder.
Generally, the spindle positioning axes are clamped mechanically
except when positioning is under way.
In the turning process, the workpiece is rotated by the spindle to which
it is attached (spindle rotation mode), at the speed specified for the
spindle motor. The value for the spindle speed is input from the spindle
controller to the spindle amplifier.
When the optional spindle positioning function is activated, the spindle
is moved to a defined angle, and the workpiece is repositioned at that
angle.
The specified move distance is input to the error counter, and the
velocity command is issued for the spindle motor through the spindle
amplifier. The position of the spindle is detected by the installed
position coder (Spindle positioning mode).
The spindle positioning function can perform the following operations:
- Release the spindle rotation mode and enter the spindle
positioning mode Specifying a particular M code sets a
reference position in the spindle positioning mode. (This is called
spindle orientation.)
- Position the spindle in the spindle positioning mode
Position an optional angle using address C (H), and position a
semi-fixed angle using a specific M code parameter.
- Release the spindle positioning mode and enter the spindle
rotation mode
Specifying a particular M code parameter changes the spindle to
the spindle rotation mode.
The least command increment, least input increment, and maximum
value for the spindle positioning axis are set as follows:
- Least command increment
- Minimum input increment
0.001 deg (IS-B)
- Maximum command value
±999999.999 deg
0.088deg
4096
360
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