5.2 Spindle Axis Orientation
5-5
Spindle Axis
Operation
5.2
Spindle Axis Orientation
Spindle axis orientation is positioning the spindle axis to a specified position.
Positioning is performed to a specified position while the spindle axis is stopped or rotating. Send a reference
from the host controller to shorten the time that is required until the axis stops (i.e., the orientation time).
5.2.1
Implementing Orientation
There are four ways to implement orientation.
1. Perform positioning via speed control of the spindle axis. Perform position control from the host controller
and perform positioning to the specified stop position. Orientation is performed with speed control, but this
method has the disadvantage of the positioning accuracy being poor when the axis is stopped.
2. Decelerate (or in some cases, accelerate) the spindle axis to a specified speed with speed control, then
change to position control and perform positioning to the specified position from the host controller.
Refer to
5.2.2 Performing Orientation by Changing from Speed Control to Position Control
for details on
changing from speed control to position control.
This is the most standard method to use for orientation, but if the correct speed is not selected for the switch
from speed control to position control, the orientation operating time may increase.
3. Decelerate the spindle axis with position control and then perform positioning to the specified position
from the host controller.
Spindle axis orientation is performed with position control, but the orientation operating time may increase
due to the difficulty of using all the motor output torque in Position Control Mode.
4. Use the SERVOPACK’s high-speed orientation function and set the target position from the host controller
to perform positioning to the specified position.
For details, refer to
5.2.3 Orientation Using the QUICK_ORT Command.
Control is performed so that the operations in item 2, above, are performed by the SERVOPACK to mini-
mize the time required until positioning, therefore minimizing the orientation operating time.