Mitsubishi Electric MR-J3-B-RJ006 Instruction Manual page 106

4. OPERATION AND FUNCTIONS
(2) About proximity dog type home position return using incremental linear encoder
(a) When the linear encoder home position (reference mark) exists in the home position return direction
When an incremental linear encoder is used, the home position is the position per servo motor
revolution to the Linear encoder home position (reference mark) passed through first after a home
position return start.
In the case of a proximity dog type home position return, the nearest position after proximity dog OFF is
the home position.
Set one linear encoder home position in the full stroke, and set it in the position that can always be
passed through after a home position return start.
Home position
return operation
Proximity dog
signal
Home position
reference position
Machine position
(b) When the linear encoder home position does not exist in the home position return direction
If a home position return is started at the position where the linear encoder home position (reference
mark) does not exist in the home position return direction, a home position return error occurs in the
controller, the error definition changes depending on the controller type. When starting a home position
return at the position where the linear encoder home position (reference mark) does not exist in the
home position return direction, move the axis up to the stroke end on the side opposite to the home
position return direction by jog operation, etc. of the controller once, then make a home position return.
Home position
return operation
Proximity dog
signal
Machine position
ON
OFF
ON
OFF
Stroke end
Home position return enabled area
POINT
To execute a home position return securely, start a home position return after
moving the axis to the opposite stroke end by jog operation, etc. of the
controller.
To execute a home position return securely, start a home position ret A home
position return cannot be made if the incremental linear encoder does not
have a linear encoder home position (reference mark). Always provide a
linear encoder home position (reference mark). (One place in the fully stroke)
Home position return direction
Home position return speed
Equivalent to one servo motor revolution
Linear encoder home position
Home position return direction
Home position return speed
JOG operation
Linear encoder home position
Home position return disabled area
4 - 9
Creep speed
Home position
Creep speed
Home position