Mitsubishi Electric MELSEC-LD77MS2 User Manual page 194

0 : Near-point dog method
(1) Start machine OPR.
(Start movement at the "
".)
direction
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to "
Pr.47
speed.
(At this time, the near-point dog must be ON. If the near-
point dog is OFF, the axis will decelerate to a stop.)
(4) At the first zero signal after the near-point dog turned OFF,
machine OPR is completed.
Note) After the home position return (OPR) has been
started, the zero point of the encoder must be passed
at least once before point A is reached.
However, if selecting "1: Not need to pass servo
motor Z-phase after power on" with "Function
selection C-4 (PC17)", it is possible to carry out the
home position return (OPR) without passing the zero
point.
4 : Count method 1)
(1) Start machine OPR.
(Start movement at the "
".)
direction
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to "
Pr.47
speed.
(4) After the near-point dog turns ON and the movement
amount set in "
near-point dog ON
stops with the first zero signal, and the machine OPR is
completed.
Note) After the home position return (OPR) has been started,
the zero point of the encoder must be passed at least
once before point A is reached.
However, if selecting "1: Not need to pass servo motor Z-
phase after power on" with "Function selection C-4
(PC17)", it is possible to carry out the home position
return (OPR) without passing the zero point.
OPR speed
Pr.46
", and move with the creep
Creep speed
OPR speed
Pr.46
", and move with the creep
Creep speed
Setting for the movement amount after
Pr.50
" has passed, the Simple Motion module
Chapter 5 Data Used for Positioning Control
" in the "
OPR
Pr.44
(1)
" in the "
OPR
Pr.44
V
(1)
Near-point dog OFF
5 - 54
V
OPR speed
Pr.46
(2)
(3)
ON
Near-point dog OFF
Zero signal
Pr.50
OPR speed
Pr.46
Setting for the movement
(2)
amount after near-point dog ON
Pr.47 Creep speed
(3) (4)
A
Md.34
ON
Zero signal
Pr.47
Creep speed
(4)
t
A
t
Movement amount after
near-point dog ON
The near-point dog must turn OFF
at a sufficient distance away from
the OP
First zero signal after moving the
movement amount after near-
point dog ON