Zero Point Return Method (4): Stopper Stop Method 3) - Mitsubishi Electric A1SD75P1-S3 User Manual

8 ZERO POINT RETURN CONTROL

8.2.6 Zero point return method (4): Stopper stop method 3)

The following shows an operation outline of the "stopper stop method 3)" zero point
return method.
The "stopper stop type 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.49 Creep
speed", so it will take some time until the machine zero point return completion.)
The machine zero point return is started.
(The machine moves at the "
1)
Torque 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 "
The pulse output from the AD75 will stop at the zero point signal after the machine stops, outputting the "deviation
3)
counter clear output" to the drive unit.
After a "deviation counter clear output" is output to the drive unit, the zero point return complete flag (
4)
b4) turns from OFF to ON, and the zero point return request flag (
Zero point signal
Torque limit
Machine zero point return start
(Positioning start signal)
Zero point return request flag
[ Md.40 Status : b3]
Zero point return complete flag
[ Md.40 Status : b4]
Deviation counter clear output
Md.35 Axis operation status
Md.44 Movement amount
after near-point dog ON
Md.29 Current feed value
Md.30 Machine feed value
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Operation chart
Creep speed", in the direction designated in "
Pr.49
OFF
OFF
OFF
Standing by
Inconsistent
Inconsistent
Fig. 8.9 Stopper stop method 3) machine zero point return
Creep speed" and stops.
Pr.49
Status: b3) turns from ON to OFF.
Md.40
V
Pr. 49 Creep speed
Valid torque limit range
ON
ON
In zero point return
0
Value the machine moved is stored
8 - 14
MELSEC-A
Zero point return direction".
Pr.46
Status:
Md.40
Stops at stopper
t
ON
Standing by
Zero point address