Mitsubishi MELSEC-Q Series User Manual page 70

4
DATA USED FOR POSITIONING CONTROL
OPR method
Pr.10
[Machine OPR control operation]
0: Near-point dog method
(1) The machine OPR control is started.
(The axis starts movement in "
speed".)
(2) The near-point dog ON is detected and deceleration starts.
(3) The axis decelerates until it reaches to "
then starts moving at the Creep speed. (At this time, the near-point
dog must be ON.)
(4) When the first zero signal (signal output for one pulse per one
rotation) after near-point dog OFF is detected, pulse output from the
QD72P3C3 stops, and the machine OPR control is completed.
1: Stopper 3
(1)
(The axis starts movement in "
speed".) At this time, a torque limit to the motor is required. If torque
limit is not set, the motor may be a failure at (2).)
(2) The axis contacts against the stopper at "
then stops.
(3) When the zero signal (signal which detects a contact against a
stopper, and then is output) is detected, pulse output from the
QD72P3C3 stops, and the machine OPR control is completed.
4
- 13 4.2 Parameter List
[Setting contents]
Set "OPR method" for performing machine OPR control.
0: Near-point dog After the axis decelerates at the near-point dog ON, it stops at the zero signal and
method then the machine OPR control is completed.
After the axis starts rotating at creep speed, it stops at the stopper and then the
1: Stopper 3
machine OPR control is completed at zero signal.
For details of each OPR method, refer to "Section 8.2.2 OPR method for machine
OPR control".
OPR direction"at "
Pr.11
Creep speed", and
Pr.14
OPR direction"at "
Pr.11
Creep speed", and
Pr.14
OPR
Pr.13
V
Pr.13 OPR speed
Pr. 14 Creep speed
(1)
Near-point dog
Zero singal
Creep
Pr.14
V
(1)
Zero signal
(2)
(4)
(3)
t
ON
OFF
First zero after
near-point dog OFF
Pr.14 Creep speed
Stopped by stopper.
(2)
(3)
t