Mitsubishi Electric MR-J4-_GF, Instruction Manual

Page: 82 / 274

6. SERVO MOTOR DRIVING
6 - 23
a) 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).
L
1
≥
V
60
•
td
2
··································································································· (6.1)
L
1
: Length of the proximity dog [mm]
V: Home position return speed [mm/min]
td: Deceleration time [s]
L
2
≥ 2 • ∆ S ······································································································ (6.2)
L
2
: Length of the proximity dog [mm]
∆ S: 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]
b) 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.
OFF
0 Resolution/2 0
Servo motor Z-phase
DOG (Proximity dog) ON
Proximity
dog