Mitsubishi Electric MELSERVO-J4 series, Инструкция по эксплуатации

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4 STARTUP
4.6 Home position return mode
Method -2 and -34 (Count type home position return)
For the count type home position return, after the front end of the proximity dog is detected, the position is
shifted by the distance set in the travel distance after proximity dog. Then, the first Z-phase is set as the home
position. Therefore, when the on-time of the proximity dog is 10 ms or more, the length of the proximity dog
has no restrictions. Use this home position return type when the dog type home position return cannot be
used because the length of the proximity dog cannot be reserved or other cases.
The following figure shows the operation of Homing method -2. The operation direction of Homing method -34 is opposite to
that of Homing method -2.
*1 After the front end of the proximity dog is detected, if the distance after proximity dog is traveled without reaching the creep speed, [AL.
90] occurs. Set the travel distance after proximity dog enough for deceleration from the home position return speed to the 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.
Home position return speed
Creep speed
Proximity dog
*1
Deceleration time
constant
Home position return
position data
Servo motor speed
Reverse
rotation
0 r/min
Forward
rotation
Statusword bit 10
Target reached
ON
OFF
ON
OFF
Statusword bit 12
Homing attained
ON
OFF
ON
OFF
Controlword bit 4
Homing operation start
ON
OFF
Z-phase
DOG (Proximity dog)
Acceleration time
constant
3 ms or shorter
Travel distance after
proximity dog
Home position
shift distance
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