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MELSEC-Q
5 DATA USED FOR POSITIONING CONTROL
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 QD75MH 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: It is not necessary to pass
through the Z phase after the power on." with "
Pr.180
Function selection C-4", it is possible to carried out the
home position return (OPR).
A
t
V
ON
(4)
(3)
(2)
(1)
Near-point dog OFF
Zero signal
OPR speed
Pr.46
Pr.47 Creep speed
Pr.50
Setting for the movement
amount after near-poing dog ON
First zero signal after moving the
movement amount after near-
point dog ON
Movement amount after
near-point dog ON
Md.34
The near-point dog must turn OFF
at a sufficient distance away from
the OP position.
5 : Count method 2)
(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, machine OPR is
completed.
t
V
ON
(1)
(2)
(3)
(4)
Near-point dog OFF
Movement amount after
near-point dog ON
Md.34
OPR speed
Pr.46
Pr.47 Creep speed
Pr.50
Setting for the movement
amount after near-poing dog ON
6 : Data set method
The position where the machine OPR has been made will be the OP.
(Perform after the servo amplifier has been turned ON and the servomotor has been rotated at least once using the
JOG or similar operation. However, if selecting "1: It is not necessary to pass through the Z phase after the power
on." with "
Pr.180
Function selection C-4", it is possible to carried out the home position return (OPR).)