Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 156

■Method 19 and Method 21 (Homing without index pulse)
The following figure shows the operation of Homing method 19. The operation direction of Homing method 21 is opposite to
that of Homing method 19.
Statusword bit 10
Target reached
Statusword bit 12
Homing attained
Forward
rotation
Servo motor speed
Reverse
rotation
DOG (Proximity dog)
Controlword bit 4
Homing operation start
• When a home position return is started from the proximity dog
Servo motor speed 0 r/min
Reverse
rotation
After retracting to before proximity dog,
the home position return starts from here.
• When the stroke end is detected
Forward
rotation
Servo motor speed
0 r/min
Home position return start position
4 STARTUP
154
4.6 Home position return mode
ON
OFF
ON
OFF
Acceleration time
constant
Home position return position data
0 r/min
3 ms or shorter
ON
OFF
ON
OFF
Home position
return direction
Proximity dog
Home position
return direction
Home position
Deceleration time constant
return speed
Creep speed
Home position return start position
Stroke end
The servo motor stops due to
the occurrence of [AL. 90].
Travel distance after proximity dog
+
Home position shift distance
Proximity dog