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8 OPR CONTROL
8.2.4 OPR method (2): Stopper method 1)
The following shows an operation outline of the "stopper method 1)" OPR method.
The machine OPR is started.
(The machine begins the acceleration designated in "
1)
Pr.44
"
OPR direction". It then moves at the "
2)
The machine begins decelerating when the near-point dog ON is detected.
The machine decelerates to the "
3)
(Torque limiting is required at this time. If the torque is not limited, the servomotor may fail in step 4).)
4)
The machine presses against the stopper at the creep speed and stops.
The pulse output from the QD75 will stop when the "
5)
outputting the "deviation counter clear output" to the drive unit.
(A "deviation counter clear signal output time" is set in the
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag (
6)
and the OPR request flag (
Machine OPR start
(Positioning start signal)
OPR request flag
[ Md.31 Status : b3]
OPR complete flag
[ Md.31 Status : b4]
Deviation counter clear output
Md.26 Axis operation status Standing by
Md.34 Movement amount
after near-point dog ON
Md.20 Current feed value
Md.21 Machine feed value
Operation chart
Pr.46
Pr.47
Creep speed", and subsequently moves at that speed.
Md.31
Status: b3) turns from ON to OFF.
V
Pr. 46 OPR speed
1)
Torque limit
Near-point dog OFF
ON
OFF
ON
OFF
OFF
In OPR
Inconsistent
0
Inconsistent
Value the machine moved is stored
Fig. 8.4 Stopper method 1) machine OPR
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Pr.51
OPR acceleration time selection", in the direction designated in
OPR speed" when the acceleration is completed.)
Pr.49
OPR dwell time" has elapsed after the near-point dog turns ON,
Pr.55
.)
Md.31
Pr. 47 Creep speed
Stops at stopper
2)
3)
4)
5) 6)
Range in which the servomotor rotation
is forcibly stopped by the stopper
Valid torque limit range
ON
Dwell time measurement
8 - 8
MELSEC-Q
Status: b4) turns from OFF to ON,
t
Time out of dwell time
ON
Deviation counter clear signal
Pr.55
output time
Standing by
OP address
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