Opr Method (3): Stopper 2 - Mitsubishi Q Series User Manual

8 OPR CONTROL

8.2.5 OPR method (3): Stopper 2

Machine OPR control is started.
(Acceleration starts in the direction set in "OPR. 2 OPR direction" at the time set in "OPR. 6 ACC/DEC time at OPR",
1)
and the axis moves at "OPR. 4 OPR speed".)
2) Near-point dog ON is detected and deceleration starts at the time set in "OPR. 6 ACC/DEC time at OPR".
Speed is reduced to " OPR. 5 Creep speed" and the axis then moves at the creep speed.
3)
(At this time, the motor torque must be limited. If the torque is not limited, the motor may fail at 4.)
4) The machine presses against the stopper at the creep speed and stops.
On detection of the zero signal after the stop, the pulse output from the QD70 stops immediately and the "deviation
5) counter clear output" is output to the drive unit.
(The "deviation counter clear signal output time" is set in Pr. 8 .)
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag (Md. 7 Status: b1) turns from
6)
OFF to ON, and the OPR request flag (Md. 7 Status: b0) turns from ON to OFF.
OPR control start
(Positioning start signal: Y8 to YF)
OPR request flag
Md.7 Status: b0
OPR complete flag
Status: b1
Md.7
Deviation counter clear output
Md.4 Axis operation status
Md.2 Movement amount after
near-point dog ON
Md.1 Current feed value
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The following shows an operation outline of the "stopper 2" OPR method.
Operation chart
V
1)
ON
OFF
ON
OFF
OFF
Standby During OPR
Unfixed 0
Unfixed
Traveled value is stored
Fig. 8.6 Stopper 2 machine OPR control
OPR.4 OPR speed
Deceleration at the near -point dog ON
Bias speed at start
Pr.6
2) 3) 4) 5) 6)
Zero signal
Torque limit
ON
Near-point dog
OFF
MELSEC-Q
OPR.5 Creep speed
Stopper
t
ON
Pr.8 Deviation counter clear signal output time
Standby
OP address
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