
B–64112EN/01
21. AXIS CONTROL
NC FUNCTION
215
This function can be used to suppress vibrations caused by interference
between the main axis and the sub axis in position tandem (quick
synchronization) control.
NOTE
1 The function can only be used for two–axis quick
synchronization control. It cannot be used for multiaxis
quick synchronization control.
2 In a servo axis arrangement, the main axis must be placed
on an odd–numbered axis and the sub axis must be placed
on an even–numbered axis adjacent to the main axis.
3 The function cannot be used for a mechanism in which a
mechanical connection between two axes can be released.
In a closed loop system equipped with a built–in absolute position
detector (serial pulse coder) and incremental linear scale, a coordinate
system is established at power–up by using absolute position data from
the built–in absolute position detector. The subsequent position control
is performed using incremental data of the linear scale. Since the position
immediately after power–up is a temporary position, manual reference
position return is needed to obtain a correct position.
When this function is used, a stroke limit check is enabled even before
reference position return, although the position at power–up is an
approximate position. Note that this function does not use the
incremental linear scale as an absolute position detector.
This function is optional.
Serial pulse coder
(absolute position detector)
Linear scale
(incremental)
Ordinary position control
CNC
Absolute position detection at power–up
Fig. 21.14 System using the temporary coordinate setting function
21.13
TANDEM
DISTURBANCE
ELIMINATION
CONTROL
21.14
TEMPORARY
ABSOLUTE
COORDINATE
SETTING