Opr Method (4): Stopper Method 3) - Mitsubishi Electric QD75P1N User Manual

8 OPR CONTROL

8.2.6 OPR method (4): Stopper method 3)

The machine OPR is started.
(The machine moves at the " Pr.47 Creep speed", in the direction designated in " Pr.44 OPR direction". Torque
1)
limiting is required at this time. If the torque is not limited, the servomotor may fail when the machine presses against
the stopper in step 2.)
2)
The machine presses against the stopper at the " Pr.47 Creep speed" and stops.
The pulse output from the QD75 will stop at the zero signal after the machine stops, outputting the "deviation counter
clear output" to the drive unit.
3)
(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
4)
from OFF to ON, and the OPR request flag ( Md.31 Status: b3) turns from ON to OFF.
Zero signal
Torque limit
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
Md.20
Current feed value
Md.21 Machine feed value
Md.35
Torque limit stored
value
The following shows an operation outline of the "stopper method 3)" OPR method.
The "stopper method 3)" method is effective when a near-point dog has not been installed.
(Note that the operation is carried out from the start at the " Pr.47 Creep speed", so it will
take some time until the machine OPR completion.)
Operation chart
V
1)
Valid torque limit range
ON
OFF
ON
OFF
OFF
Standby
OPR
Inconsistent
0
Inconsistent
Value the machine moved is stored
OPR torque limit value
Inconsistent
Fig. 8.10 Stopper method 3) machine OPR
Pr.47 Creep speed
Stops at stopper
2) 3) 4)
ON
Pr.55
Standby
OP address
8 - 15
MELSEC-Q
t
Deviation counter clear
signal output time