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Origin proximity
signal
1
0
1
Origin signal
0
Pulse output
CCW
ORIGIN SEARCH (Start)
CCW
ORIGIN SEARCH (Start)
Pulse output
CCW
In this mode, if deceleration has not ended when the origin proximity signal has
turned OFF, positioning is stopped by the origin signal input after deceleration
has ended. If the deceleration period is short for some reason (such as starting
inside the origin proximity area), the Position Control Unit will detect another ori-
gin signal. Therefore, be sure that the origin proximity signal period is long
enough, i.e., at least as long as the deceleration period.
Origin (Stop)
P
D
A general method for calculating the number of pulses within the deceleration
interval is presented below.
Deceleration time T
D
where R: deceleration data (pps/1 ms);
Number of pulses P
D
If V
= 20000 pps, V
H
L
2
then P
= 20000
-- 1000
D
Therefore, approximately 2,000 pulses are required for deceleration.
Ideal position for origin proximity
signal to turn OFF
VH
VL
TD
= V
-- V
/1000 x R,
H
L
for deceleration period = (V
= V
= 1000 pps, and R = 1000 pps/ms,
2
/2000 x 100 = 1995.
Section
9-3
Positioning axis
CW
Positioning axis
CW
Positioning axis
CW
+ V
) x T
/2
H
L
D
H 2
L 2
-- V
/2000 x R.
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