
B–63523EN–1/03
9. SPINDLE SPEED FUNCTION
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1. Spindle mode (ordinary spindle control)
The second spindle rotates upon the issue of the same command as that
used for the first spindle.
The command does not specify the speed of the spindle, instead
specifies the ratio of the spindle motor speed to the maximum speed.
So, if the spindle unit configuration (maximum motor speed,
motor–spindle gear ratio, and so forth) of the first spindle is the same
as that of the second spindle, both spindles will rotate at about the same
speed. (The synchronization of rotation cannot be not guaranteed. If
the configurations of the two spindles differ, the speed of one spindle
will differ from that of the other.) For details of spindle control, see
Section 9.3.
2. Cs contour control (contour axis control based on the spindle motor)
When the Cs contour axis control option is selected, contour control
can also be applied to the second spindle. Note, however, that
independent control is not possible, since the motion of the second
spindle is being controlled by the first spindle. The display of the
move command address and position data is limited to the first
spindle. Reference position return is also performed in the same way
as usual. However, both spindles are checked for the completion of
reference position return, so that the reference position return signal
for the Cs contour control axis is turned on only after reference
position return has been completed by both spindles.
While simple spindle synchronous control is applied, the user can
switch between spindle mode and Cs contour control mode. For
details of Cs contour control, see Section 9.9.
3. Rigid tapping
When the rigid tapping option is selected, the second spindle supports
rigid tapping under the control of a rigid tapping command for the first
spindle. (Rigid tapping for the second spindle cannot be performed
independently of the first spindle.)
During diagnosis, spindle data such as any positional deviation is
displayed for the first spindle.
For details of rigid tapping, see Section 9.11.
4.
Spindle positioning (T series)
When the spindle positioning option is selected, the spindle
positioning function for the second spindle is enabled under the
control of a spindle positioning command for the first spindle. (The
spindle positioning function for the second spindle cannot be used
independently of the first spindle.)
In the same way as with Cs contour axis control, the display of
command address and position data is limited to the first spindle.
Operations such as orientation are performed in the same way as usual.
However, both spindles are checked for the completion of orientation,
and the spindle positioning sequence is processed only after the
completion of positioning by both spindles has been confirmed.
For details of spindle positioning, see Section 9.8.
D Operation in each
control mode