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9 USING A LINEAR SERVO MOTOR
9.4 Basic function
When the servo motor returns at the stroke end
*1 This is not available with the software limit.
• When the linear encoder home position does not exist in the homing direction
If the homing is performed from the position where the linear encoder home position does not exist in the homing direction, an
error may occur. If an error occurs, change the homing method, or move the linear servo motor to the stroke end on the
opposite side of the homing direction with the JOG operation or others from the controller.
• Caution for passing the home position (reference mark)
An interval for turning on home position (reference mark) signal of the linear encoder has a certain width. (Specifications differ
depending on the linear encoder.)
MR-J5 Partner's Encoder User's Manual
Example: When Z-phase is recognized at startup
The position where LZ (Encoder Z-phase pulse) is turned on depends on the direction of home position passing. In cases
where each homing is required to be completed at the same position, such as dog type homing, start homing with the same
direction.
• Point to note for linear encoder without home position (reference mark)
For the linear encoder without home position (reference mark), LZ (Encoder Z-phase pulse) of the servo amplifier is not
outputted. Check the specifications of the controller for whether LZ (Encoder Z-phase pulse) is necessary or not for homing.
0 r/min
Stroke end
*1
Homing direction
Homing start position
Forward
rotation
Servo motor speed
Reverse
rotation
Linear encoder home position
Homing automatically starts from here.
ON
OFF
0 mm/s
Homing direction
Homing speed
Creep speed
Linear servo motor speed
JOG operation
Proximity dog signal
Linear servo motor position
Stroke end
Linear encoder home position
Home position
Home position returnable area
Home position non-returnable area
B
A
Home position signal
A recognized as
ON position
B recognized as ON position
