
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
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11.9 Cs CONTOUR CONTROL
11.9.1 Cs Contour Control
Overview
The Cs contour control function positions the serial spindle using the
spindle motor in conjunction with a dedicated detector mounted on the
spindle.
This function can perform more accurate positioning than the spindle
positioning function, and has an interpolation capability with other
servo axes.
- Increment system
As the least input increment of the Cs contour control axis, IS-B must
be set.
- Command multiplication
Command multiplication for the Cs contour control axis must be set to
2 (1×).
Explanation
The speed of the serial spindle is controlled by the spindle speed
control function, while the spindle positioning is controlled by the Cs
contouring control function ("spindle contour control"). Spindle speed
control rotates the spindle using the velocity command, while the
spindle contour control rotates the spindle using the move command.
Switching between spindle speed control and spindle contour control
is performed by the DI signal from the PMC.
In the Cs contour control mode, the Cs contour control axis can be
operated either manually or automatically, in the same way as normal
servo axes.
(For a reference position return, see the relevant description in this
section.)
- Setting the Cs contour control axis
If bit 7 (CSS) of parameter No. 3704 is 0:
Cs contour control is enabled for the first spindle in the path.
The axis used for Cs contour control must be set as an axis of the axes
controlled by the CNC. Any controlled axis may be set as the Cs
contour control axis.
Using parameter No. 1023, assign "*1" in the field corresponding to
the chosen servo axis. (For single-path systems)
As the servo axis number (parameter No. 1023) of the axis used as the
Cs contour control axis, set the number of the target logical spindle for
Cs contour control with a minus sign (-1 to -n). (For multi-path
systems)
This setting must be made only once for each control system. The
spindle operating as the Cs contour control axis is the first spindle in
the path.