Mitsubishi Electric MELSECQ Series User Manual page 73

4 DATA USED FOR POSITIONING CONTROL
Setting example of " OPR. 8 Setting for the movement amount after near-point dog ON"
When 10kpulse/s is set in " OPR. 4 OPR speed", 2kpulse/s in " OPR. 5 Creep speed",
and 320ms in " OPR. 6 ACC/DEC time at OPR", calculate " OPR. 8 Setting for the movement amount
after near-point dog ON" as indicated below.
[Machine OPR control operation]
OPR. 4 OPR speed : Vz=10kpulse/s
Near-point dog
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OPR. 7 DEC/STOP time at OPR
Set the time taken to make a stop after reaching " Pr. 6 Bias speed at start" from
" OPR. 5 Creep speed" under "Count 2" machine OPR control or to make a stop
after reaching " Pr. 6 Bias speed at start" from the speed during machine OPR
control at axis stop factor occurrence (axis stop signal ON or error occurrence).
(When OPR method is "Count 2")
V
Pr. 6
OPR. 8 Setting for the movement amount after near-point dog ON
When the OPR method is Count 1 or 2, set a value not less than the deceleration
distance after the near-point dog signal has turned ON.
OFF
ON
OPR. 9 OPR dwell time
When the OPR method is Stopper 1, set the time from when the near-point dog
turns ON until machine OPR control is completed.
Set not less than the movement time from when the near-point dog turns ON until
a stop is made by the stopper.
(When the OPR method is other than "Stopper 1", the " OPR. 9 OPR dwell time"
value need not be set.)
search engine
(When axis stop signal is turned ON during
machine OPR control (Common to all OPR methods))
V
OPR. 4
OPR. 5
t
OPR. 7
[Deceleration distance]
OPR. 5 Creep speed: Vc=2kpulse/s
80ms : t'
Set 2000 pulse or more in " OPR. 8 Setting for the
movement amount after near-point dog ON".
OPR. 6 ACC/DEC time at OPR : t=320ms
MELSEC-Q
Axis stop factor occurrence
OPR. 5
OPR. 4
Pr. 6
t
OPR. 7
1
t + t'
=
Vz
2
1000
Vz (t + t')
=
2000
3
10 10 (320 + 80)
=
2000
= 2000
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