Basic Functions; Homing - Mitsubishi Electric MELSERVO-J5 User Manual

12.5

Basic functions

Homing

Homing is performed based on the load-side encoder feedback data regardless of the load-side encoder type.
It is irrelevant to the Z-phase position of the servo motor encoder.
The types and methods of homing are basically the same as in semi closed loop control.
• In the case of homing with a dog signal, the home position (reference mark) must be passed through when
an incremental type linear encoder is used, or the Z-phase must be passed through when a rotary encoder
is used, during a period from a home position return start until the dog signal turns off.
• For the linear encoder, a home position (reference mark) of the linear encoder is necessary in the homing
direction. In addition, place the proximity dog position one half of the rotation or more before the reference
mark.
Precautions
To execute homing securely in the following example, start homing after moving the servo motor to LSN with the JOG
operation.
Returnable area: Homing is enabled
if started from this area.
LSN
Homing direction
12 USING A FULLY CLOSED LOOP SYSTEM
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12.5 Basic functions
Non-returnable area: Homing is disabled
if started from this area.
Proximity dog
Home position of
linear encoder (reference mark)
LSP