Mitsubishi Electric QD70D4 User Manual page 178

8 OPR CONTROL
(1) When the work is at a position beyond the near-point dog and before the Retry switch
1) Start the machine OPR to move the work in the " OPR. 2 OPR direction".
2) The Retry switch signal turns ON, and the movement is decelerated and stopped.*
3) At " OPR. 4 OPR speed", move the work in a direction opposite to " OPR. 2 OPR direction".
4) Decelerate and stop it by turning OFF the near-point dog.*
5) Perform the machine zero return in the direction of " OPR. 2 OPR direction".
* In steps 2) and 4), when the time set in " OPR. 9 OPR dwell time" has elapsed after
deceleration stop, the next action is started.
V
Near point
(2) When the work is positioned on the near-point dog (ON)
1) Start the machine zero return to move the work in a direction opposite to " OPR. 2 OPR
direction" at " OPR. 4 OPR speed".
2) The near-point dog turns OFF, and the movement is decelerated and stopped*.
3) Perform the machine zero return in the " OPR. 2 OPR direction".
* In step 2), when the time set in " OPR. 9 OPR dwell time" has elapsed after deceleration stop,
the next action is started.
V
Near point
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[1] Control details
The operation by the OPR retry function is shown below.
5)
4)
ON
dog
3)
1)
Starting
point
2)
ON
dog
Fig. 8.13 OPR retry operation
1)
OP Starting
point
Retry switch
OP
MELSEC-Q
2)
L
3)
ON
L
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