Mitsubishi Electric MELSERVO MR-J5 Series User Manual page 523

Absolute position linear encoder
The reference home position using an absolute position linear encoder is per 1048576 pulses based on the linear encoder
home position (absolute position data = 0). The stop intervals at homing can be changed with [Pr. PL01.2 Homing stop
interval setting]. For the specifications of the stop intervals at homing, refer to the following.
Page 520 Incremental linear encoder
The specifications are the same as the ones when an incremental encoder is used.
Homing operation
Precautions
• To execute homing securely, move the linear servo motor to the opposite stroke end with the JOG operation from the
controller or by other means, then start homing.
• Change the setting value of [Pr. PL01.2 Homing stop interval setting] in accordance with the linear encoder resolution.
Incremental linear encoder
• When the linear encoder home position (reference mark) exists in the homing direction
The position obtained by moving the home position shift distance from the linear encoder home position (reference mark) is
set as the home position.
Ex.
Homing methods 33 and 34
The following figure shows the operation of Homing method 34. The operation of Homing method 33 is opposite to that of
Homing method 34.
0 r/min
Servo motor speed
Machine position
*1 Home position shift distance can be changed with [Pr. PT07 Home position shift distance].
When the stroke end is detected
Homing direction
Homing start position Stop due to occurrence of [AL. 90]
Homing speed
Home position
shift distance
Home position
Stroke end
Homing direction
*1
Creep speed
Linear encoder home position
11 USING A LINEAR SERVO MOTOR
521
11.4 Basic functions
11