Mitsubishi A1SD75M1, User Manual

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5 - 48
MELSEC-A
5 DATA USED FOR POSITIONING CONTROL
Zero point return method
0 : Near-point dog method
(1) Start machine zero point return.
(Start machine movement at the " Pr.48 Zero point return
speed" in the " Pr.46 Zero point return direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to " Pr.49 Creep speed", and move with the
creep speed.
Decelerate to a stop at the near-point dog OFF.
(4) Move to the first zero point (single-pulse output per motor
revolution) after the near-point dog OFF, and complete the
machine zero point return.
Note) If the zero point is not detected between a machine
zero point return start and deceleration to a stop by
the near-point dog OFF, an error "zero point not pass
at zero point return" (error code: 210) occurs.
Near-point dog
Zero point
Zero point return speed
Pr.48
Pr.49
Creep speed
t
V
ON
OFF
(1)
(2)
(3) (4)
4 : Count method 1)
(1) Start machine zero point return.
(Start movement at the " Pr.48 Zero point return speed" in
the " Pr.46 Zero point return direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to " Pr.49 Creep speed", and move with the
creep speed.
Stop in the position where the movement amount set in
" Pr.52 Setting for the movement amount after near-point
dog ON" is reached after the near-point dog turned ON.
(4) Move to the first zero point (single-pulse output per motor
revolution), and complete the machine zero point return.
Note) If the zero point is not detected from when the
machine zero point return has started until the
movement amount set in " Pr.52 Setting for the
movement amount after near-point dog ON" is
reached, an error "zero point not pass at zero point
return" (error code: 210) occurs.
t
V
ON
OFF
(4)
(3)
(2)
(1)
Zero point
return speed
Pr.48
Pr.52
Setting for the movement amount
after near-poing dog ON
Pr.49 Creep speed
Near-point dog must turn OFF
at sufficient distance away
from the zero point position
First zero point after the
movement amount after
near-point dog ON is reached
Near-point dog
Zero point
5 : Count method 2)
(1) Start machine zero point return.
(Start movement at the " Pr.48 Zero point return speed" in
the " Pr.46 Zero point return direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to " Pr.49 Creep speed", and move with the
creep speed.
(4) Stop when the movement amount set in " Pr.52 Setting for
the movement amount after near-point dog ON" is reached
after the near-point dog turned ON, and complete the
machine zero point return.
t
V
ON
(1)
(2)
(3)
(4)
Near-point dog OFF
Zero point
return speed
Pr.48
Pr.49 Creep speed
Pr.52
Setting for the movement
amount after near-poing dog ON