16.7.9 Dog cradle type home position return
You can use the position, which is specified by the first Z-phase signal after the front end of a proximity dog
is detected, as the home position.
(1) Device/parameter
Set input devices and parameters as follows.
Home position return mode
selection
MD0 (Operation mode selection 1)
DI0 (Point table No. selection 1) to
DI7 (Point table No. selection 8)
Dog cradle type home
position return
_ _ _ 7: Select the dog cradle type.
Home position return
direction
Refer to section 4.4.1 (2) to select the home
position return direction.
Refer to section 4.4.1 (2) to select the dog
input polarity.
Home position return speed
Set the rotation speed until the dog is
detected.
Set the rotation speed after the dog is
detected.
Home position shift distance
Set this item to shift the home position, which
is specified by the Z-phase signal.
Home position return
acceleration/deceleration time
constant
Use the acceleration/deceleration time
constant of point table No. 1.
Home position return position
data
Set the current position at the home position
return completion.
(2) Timing chart
The setting value of [Pr. PT08 Home position return position data] is used as the position address at the
home position return completion.
ON
OFF
MEND (Travel completion)
ON
OFF
CPO (Rough match)
ON
OFF
Servo motor speed
MD0
(Operation mode selection 1)
Forward rotation
0 r/min
Reverse rotation
ON
OFF
DOG (Proximity dog)
ZP
(Home position return completion)
ON
OFF
ON
OFF
ON
OFF
ST1 (Forward rotation start)
ST2 (Reverse rotation start)
3 ms or shorter
Home position return speed
Deceleration time constant
Creep speed
Home position
shift distance
Home position return
position data
5 ms or longer
Acceleration time
constant
Proximity dog
ON
OFF
Z-phase
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