
B-63323EN-1/03 9.SPINDLE FUNCTION
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Switching from spindle rotation control to Cs contour
control or vice versa may be performed in a block during
automatic operation. In this case, the position gain is not
switched immediately. The CNC automatically sets the
position gain after confirming that all controlled axes stop
completely.
4. The CNC automatically sets the position gain after
confirming that all the controlled axes stop completely when
switching between spindle rotation control and Cs contour
control is performed during other than automatic operation.
5. When the gain is not switched
Gain switching is not required when there is no interpolation
between the Cs contour control axis and another axis and
when the same position gain is set for the Cs contour control
axis and servo axes.
In this case, set no gain switching (set NGC, bit 0 of
parameter No. 5609, to 1).
Reference position return of the Cs contour control axis
Always perform reference position return because the current position
is missing immediately after switching the serial spindle from spindle
rotation control to Cs contour control. However, the tool can be moved
without reference position return when a setting (setting ZRN, bit 0 of
parameter No. 1005, to "1") is made to provide no reference position
return function and the coordinate system need not be established.
Reference position return is performed for the Cs contour control axis
as follows:
- Manual reference position return
When feed axis and direction selection signal (+J1<G65#0>,
+J2<G69#0>, ..., -J1<G65#1>, -J2<J69#1>, ...) is set to "1" in
reference position return mode after the serial spindle is switched
to Cs contour control mode, the spindle starts reference position
return operation. After the spindle is positioned at the reference
position, reference position return end signal ZPn<F06#0>... is set
to "1." When feed axis and direction selection signal +Jn or -Jn is
set to "1," the spindle moves in the reference position return
direction. Set the direction of reference position return using CSO
(bit 3 of parameter No. 3000).
- Reference position return in automatic operation mode (G28
command)
When G28 is issued after the serial spindle is switched to the Cs
contour control mode, the spindle motor stops, then the spindle
moves to the intermediate position. Then, reference position
return is performed. After the spindle is positioned to the
reference position, reference position return end signal ZPn
<F064#0>... is set to "1."
When reference position return is performed once after the serial
spindle is switched to Cs contour control mode, the spindle is
positioned to the reference position and ZPn is set to "1." The
feedrate set for parameter No. 3074 is used for reference position
return.