Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 157

■Method 20 and Method 22 (Homing without index pulse)
The following figure shows the operation of Homing method 20. The operation direction of Homing method 22 is opposite to
that of Homing method 20.
ON
Statusword bit 10
Target reached
OFF
ON
Statusword bit 12
Homing attained
OFF
Acceleration time
constant
Forward
rotation
Servo motor speed 0 r/min
Reverse
rotation
ON
Z-phase
OFF
ON
DOG (Proximity dog)
OFF
ON
Controlword bit 4
Homing operation start
OFF
• When a home position return is started from the proximity dog
Home position
return direction
Forward
rotation
Servo motor speed
0 r/min
Reverse
rotation
Home position shift distance
+
Travel distance after proximity dog
• When the stroke end is detected
Home position
return direction
Forward
rotation
Servo motor speed
0 r/min
Home position return start position
Home position return speed
3 ms or shorter
Proximity dog
Home position return start position
Stroke end
The servo motor stops due to
the occurrence of [AL. 90].
Home position shift distance
Deceleration time
constant
Travel distance after proximity dog
Creep speed
Proximity dog
Home position
return position data
4.6 Home position return mode
+
Home position return
position data
4 STARTUP
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