Mitsubishi MR-J4-70A User Manual

15. USING A LINEAR SERVO MOTOR
15 - 17
(1) Incremental linear encoder
CAUTION
If the resolution or the stop interval (the third digit of [Pr. PL01]) of the linear
encoder is large, it is very dangerous since the linear servo motor may crash into
the stroke end.
(a) When the linear encoder home position (reference mark) exists in the home position return direction
When you use an incremental linear encoder, LZ (Encoder Z-phase pulse) from the servo amplifier
will be the home position (reference mark) of the linear encoder.
Servo motor
speed
Linear encoder home position
Home position
Home position return speed
Creep speed
Home position return direction
ON
OFF
ON
OFF
Proximity dog signal
LZ
(Encoder Z-phase pulse)
Machine position
0 r/min
Stroke end
(b) When the linear encoder home position (reference mark) does not exist in the home position return
direction
The home position return cannot be performed from the position which the home position of the
linear encoder does not exist in the home position return direction. Move the mover to the stroke end
on the opposite side of the home position return direction with the JOG operation from the controller
and others, and then perform a home position return.
Stroke end Home position start positionHome position
Home position return speed
Creep speed
Home position return direction
ON
OFF
ON
OFF
Proximity dog signal
LZ
(Encoder Z-phase pulse)
Machine position
Linear encoder home position
JOG operation
Home position returnable area Home position non-returnable area
Servo motor
speed
0 r/min

Mitsubishi MR-J4-70A Specifications

General

Brand	Mitsubishi
Model	MR-J4-70A
Category	Amplifier
Language	English