Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

Page: 156 / 646

154
4 STARTUP
4.6 Home position return mode
■
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.
• When a home position return is started from the proximity dog
• When the stroke end is detected
ON
OFF
ON
OFF
Deceleration time constant
Creep speed
Travel distance after proximity dog
+
Home position shift distance
Home position
return speed
Home position return position data
Proximity dog
Servo motor speed
Reverse
rotation
0 r/min
Forward
rotation
Statusword bit 10
Target reached
ON
OFF
Statusword bit 12
Homing attained
ON
OFF
Controlword bit 4
Homing operation start
DOG (Proximity dog)
Acceleration time
constant
3 ms or shorter
Home position
return direction
Home position return start position
After retracting to before proximity dog,
the home position return starts from here.
Servo motor speed
Reverse
rotation
0 r/min
Proximity dog
Home position return start position
Home position
return direction
Servo motor speed
Forward
rotation
0 r/min
The servo motor stops due to
the occurrence of [AL. 90].
Stroke end