Dog Cradle Type Home Position Return - Mitsubishi Electric MELSERVO-J4 Instruction Manual

4. HOW TO USE THE POINT TABLE
(2) Timing chart
MD0
(Operation mode selection 1)
MEND (Travel completion)
CPO (Rough match)
ZP
(Home position return completion)
Forward rotation
Servo motor speed 0 r/min
Reverse rotation
DOG (Proximity dog)
ST1 (Forward rotation start)
ST2 (Reverse rotation start)
The setting value of [Pr. PT08 Home position return position data] is used as the position address at the
home position return completion.

4.4.9 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
Dog cradle type home
position return
Home position return
direction
Dog input polarity
Home position return speed
Creep speed
Home position shift distance
Home position return
acceleration/deceleration time
constant
Home position return position
data
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Acceleration time
constant
Home position return speed
3 ms or shorter
ON
OFF
ON
5 ms or longer
OFF
ON
OFF
Item Used device/parameter
MD0 (Operation mode selection 1)
DI0 (Point table No. selection 1) to
DI7 (Point table No. selection 8)
[Pr. PT04]
[Pr. PT04]
[Pr. PT29]
[Pr. PT05]
[Pr. PT06]
[Pr. PT07]
Point table No. 1
[Pr. PT08]
Deceleration time constant
Creep speed
Proximity dog
Switch on MD0.
Switch off DI0 to DI7.
_ _ _ 7: Select the dog cradle type.
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.
Set the rotation speed until the dog is
detected.
Set the rotation speed after the dog is
detected.
Set this item to shift the home position, which
is specified by the Z-phase signal.
Use the acceleration/deceleration time
constant of point table No. 1.
Set the current position at the home position
return completion.
4 - 59
Travel distance after
proximity dog
+
Home position
shift distance
Home position return
position data
Setting