
B-65270EN/05 3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT
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3.3.2 High-Speed Positioning Adjustment Procedure
(1) Overview
This section describes the adjustment procedure for high-speed
positioning required with a punch press and PC board drilling
machine.
(2) Adjustment procedure
Make a high-speed positioning adjustment while viewing the ERR
(servo error amount) and TCMD. Set a measurement range as
described below.
• ERR: Adjust the measurement range so that the precision
required for positioning can be seen. When using the
analog check board, measure VCMD instead of ERR.
(Adjust the VCMD magnification and the measurement
voltage level.) In the example below, a requested
precision of 10 µm is assumed.
• TCMD: Make an adjustment to view a specified maximum
current value. If an adjustment is made to reduce
positioning time, TCMD saturation may occur. Make
an adjustment so that the TCMD lies within a specified
maximum current.
<1> I-P function setting
Select I-P function for velocity loop control. In general, PI
function reduces start-up time for a command, but requires a
longer setting time, so that PI function is not suitable for
high-speed positioning. On the other hand, I-P function reduces
time required to reach a target position, so that I-P function is
generally used for high-speed positioning adjustment.
TCMD
ERR
20µm
270ms
Specified maximum current
300ms
TCMD
ERR
Fig. 3.3.2 (a) When PI function is used Fig. 3.3.2 (b) When I-P function is used