Mitsubishi Electric MR-JE-*C Instruction Manual page 117

6. HOMING MODE
1) Length of the proximity dog
To generate the Z-phase signal of the servo motor during the detection of DOG (Proximity dog),
set the length of the proximity dog that satisfies equations (6.1) and (6.2).
V td
L ≥ •
1
60 2
L : Length of the proximity dog [mm]
1
V: Home position return speed [mm/min]
td: Deceleration time [s]
L ≥ 2 • ΔS ·········································································································· (6.2)
2
L : Length of the proximity dog [mm]
2
ΔS: Travel distance per servo motor revolution [mm] (Note)
Note. For linear servo motor: travel distance per stop interval selection at the home position return of [Pr. PL01]
2) Adjustment
For the dog type home position return, adjust the setting so that the Z-phase signal is always
generated during the detection of a dog. Make an adjustment so that the rear end of DOG
(Proximity dog) is positioned almost at the center between the positions specified by a Z-phase
signal and the next Z-phase signal.
The generation position of the Z-phase signal can be checked with "Position within one-
revolution" of "Status Display" on MR Configurator2.
Servo motor Z-phase
DOG (Proximity dog)
............................................................................................................................. (6.1)
0 Resolution/2
Proximity
dog
ON
OFF
0
6 - 24