Opr Method (2): Stopper Method 1) - Mitsubishi Electric QD75P1N User Manual

8 OPR CONTROL

8.2.4 OPR method (2): Stopper method 1)

The machine OPR is started.
1) (The machine begins the acceleration designated in " Pr.51 OPR acceleration time selection", in the direction designated in
" Pr.44 OPR direction". It then moves at the " Pr.46 OPR speed" when the acceleration is completed.)
2) The machine begins decelerating when the near-point dog ON is detected.
The machine decelerates to the " Pr.47 Creep speed", and subsequently moves at that speed.
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 " Pr.49 OPR dwell time" has elapsed after the near-point dog turns ON, outputting
5)
the "deviation counter clear output" to the drive unit.
(A "deviation counter clear signal output time" is set in the Pr.55 .)
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag ( Md.31 Status: b4) turns from OFF to ON,
6)
and the OPR request flag ( Md.31 Status: b3) turns from ON to OFF.
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
OPR request flag
Md.31 Status : b3
OPR complete flag
Md.31 Status : b4
Deviation counter clear output
Md.26 Axis operation
status
Md.34 Movement amount
after near-point dog
ON
Current feed value
Md.20
Md.21 Machine feed value
Torque limit stored
Md.35
value
The following shows an operation outline of the "stopper method 1)" OPR method.
Operation chart
V
1)
Torque limit
Near-point dog
ON
OFF
ON
OFF
OFF
OPR
Standby
Inconsistent 0
Value the machine moved is stored
Inconsistent
Torque limit setting value
Inconsistent
Fig. 8.4 Stopper method 1) machine OPR
Pr.46 OPR speed
Pr.47
2) 3) 4)
Valid torque limit range
ON
OFF
Dwell time
measurement
OPR torque limit value
8 - 9
MELSEC-Q
Creep speed
Stops at stopper
t
5) 6)
Range in which the servomotor rotation
is forcibly stopped by the stopper
Time out of dwell time
ON
Pr.55
Deviation counter clear
signal output time
Standby
OP address