4. PARAMETERS FOR POSITIONING CONTROL
4
−
14
4.3.3
Position control gain 1, 2
(1) Position control gain 1
(a) Position control gain 1 is set in order to make the stabilization time shorter.
(b) If the position control gain 1 is too high, it could cause overshoot and the
value must therefore be adjusted so that it will not cause overshoot or
undershoot.
Undershoot
Overshoot
Time
M
o
to
r s
peed
(2) Position control gain 2
(a) Position control gain 2 is set in order to increase position response with
respect to load disturbance.
(b) Calculate the position control gain 2 value to be set from the load inertia
ratio and the speed control gain 2.
Speed control gain 2
1
Position control gain 2 =
1
+
load inertia ratio
×
10
POINTS
(1) If the position control gain 1 setting is too low, the number of droop
pulses will increase and a servo error (excessive error) will occur at high
speed.
(2) The position control gain 1 setting can be checked from a peripheral
device.
(For the method used to execute this check, refer to the operating
manual for the peripheral device used.)