
B-65270EN/05 3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT
- 69 -
The figure below shows the results of a gain adjustment for each servo
HRV control type. The figure indicates that improvement in response
speed of the current loop by servo HRV control further improves the
response speed of velocity control and position control, and therefore
quadrant protrusions can be reduced without the backlash acceleration
function.
Servo HRV1 control Servo HRV2 control Servo HRV3 control
R100mm 10000mm/min without backlash acceleration function
This manual explains the servo adjustment procedure in the following
order:
• Initialization of parameters related to high-speed and
high-precision machining
Before starting the servo adjustment for high-speed and
high-precision machining, set minimum required parameters.
• Servo HRV control setting
Select the servo HRV control type. Select suitable servo HRV
control from servo HRV2, HRV3, and HRV4.
• Adjustment of high-speed velocity control
Adjust the velocity loop gain and filter by using SERVO
GUIDE.
• Adjustment of acc./dec. in rapid traverse
Adjust the time constant for rapid traverse. In position gain
setting made in the next step, the limit is confirmed by checking
stability during rapid traverse.
• Position gain adjustment
Adjust the position gain while observing the TCMD and motor
speed in rapid traverse and cutting feed.
• Adjustment by using an arc
Adjust the feed-forward and backlash acceleration while
measuring an arc figure.
• Adjustment by using a square figure
Adjust the reduced feedrate and the acceleration for deceleration
at a corner while measuring the corner figure.
• Adjustment by using a square figure with 1/4 arcs
Adjust the velocity in the round corners while measuring the
contour error in the round corners.