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6 POSITIONING CONTROL
(2) Home position return by the dogless home position signal reference
method (Operation A)
"Operation A" of a home position return by the dogless home position signal
reference type is shown in Fig. 6.45 and Fig. 6.46.
(a) When the zero point is in the home position return direction.
Creep speed
Home position
return speed
Home position
return direction
V
Home position
return start
Home position
Zero point
1)
2)
3)
1) It travels to preset direction of home
position return with the home position
return speed.
2) Home position signal (zero point) is detected,
and a deceleration stop is made.
3) After a deceleration stop, it travels to reverse
direction of home position return with the creep
speed, the home position return ends with the
position of home position signal (zero point).
Fig. 6.45 Home position return by the dogless home position signal reference
method (Operation A)
POINT
(1) If an external limit switch is detected during a deceleration stop after zero point
detection, an error occurs and stops. Ensure there is enough distance
between the zero point signal and external limit switch, or set the deceleration
time so the decelerating distance is shortened.
(2) If multiple home position signals (zero points) are passed during deceleration
after zero point detection, by the connected servo amplifier, the following
operation occurs.
Servo amplifier model Operation
MR-J4-
B
MR-J4W-
B
MR-J4-
B-RJ
Direct drive motor
Home position return ends at the position of the
last home position signal (zero point) passed.
Linear servo
Home position return ends at the position of the
first home position signal (zero point) passed.
Fully closed loop control
MR-J3-B-RJ004
MR-J3-B-RJ006
MR-J3-B-RJ080W
Home position return ends at the position of the
last home position signal (zero point) passed.
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