Near-Point Dog Method; Count Method - Mitsubishi Electric QD77MS User Manual

0 : Near-point dog method

(1) Start machine OPR.
(Start movement at the "[Pr.46] OPR speed" in the "[Pr.44]
OPR direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to "[Pr.47] Creep speed", and move with the
creep 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 "[Pr.46] OPR speed" in the "[Pr.44]
OPR direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to "[Pr.47] Creep speed", and move with the
creep speed.
(4) After the near-point dog turns ON and the movement
amount set in "[Pr.50] Setting for the movement amount
after near-point dog ON" has passed, the Simple Motion
module 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.
Chapter 5 Data Used for Positioning Control
V
(1)
Near-point dog OFF
Zero signal
V
OPR speed
Pr.46
(1)
Near-point dog OFF
Zero signal
5 - 55
OPR speed
Pr.46
(2)
Pr.47
Creep speed
(3)
(4)
A
ON
Pr.50
Setting for the movement
(2)
amount after near-point dog ON
Pr.47 Creep speed
(3) (4)
t
A
Movement amount after
Md.34
near-point dog ON
The near-point dog must turn OFF
at a sufficient distance away from
ON
the OP.
First zero signal after moving the
movement amount after near-
point dog ON
t