Mitsubishi Electric MR-J5 Series User Manual page 257

■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 249 Homing setting method
The specifications are the same as the ones when an incremental encoder is used.
Homing operation
Precautions
• To execute a homing securely, after moving the linear servo motor to the opposite stroke end with the JOG operation from
the controller or others, 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
In the case of a dog type homing, after the proximity dog signal rear end is detected, the nearest reference home position
shifted by the home position shift distance is used as the home position.
Set one linear encoder home position in the full stroke, and set it in the proximity dog signal detection position.
Linear servo motor speed
0 mm/s
ON
Proximity dog signal
OFF
Reference home position
Linear servo motor position
*1 This can be changed with [Pr. PL01].
*2 Home position shift distance can be changed with [Pr. PT07].
Homing direction
Homing speed
Creep speed
*1
1048576 pulses
1048576 pulses × n + Home position shift distance
Linear encoder home position
Home position shift distance
*2
Home position
9 USING A LINEAR SERVO MOTOR
9.4 Basic function
9
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