Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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166
4 STARTUP
4.6 Home position return mode
Method -10 and -42 (dog type front end reference home position return)
The following figure shows the operation of Homing method -10. The operation direction of Homing method -42 is opposite to
that of Homing method -10.
*1 After the front end of the proximity dog is detected, if the rear end of the proximity dog is detected without reaching the creep speed, [AL.
90] occurs. Check the length of the proximity dog or check the home position return speed and creep speed.
• When a home position return is started from the proximity dog
• When the movement is returned at the stroke end
*1 This is not available with the software limit.
*1
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
The home position return starts from here.
Home position
return direction
Home position return start position
Servo motor speed
Forward
rotation
Reverse
rotation
0 r/min
Proximity dog
Stroke end *1