Dog Type Front End Reference Home Position Return Type - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

4. HOW TO USE THE POINT TABLE

4.4.11 Dog type front end reference home position return type

Starting from the front end of a proximity dog, the position is shifted by the travel distance after proximity dog
and the home position shift distance. The position after the shifts is used as the home position.
The home position return is available independently of the Z-phase signal. Changing the creep speed may
change the home position.
(1) Device/parameter
Set input devices and parameters as follows.
Item
Home position return mode
selection
Dog type front end reference
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
POINT
This home position return method depends on the timing of reading DOG
(Proximity dog) that has detected the front end of a proximity dog. Therefore,
when a home position return is performed at a creep speed of 100 r/min, the
home position has an error of 6400 pulses (for HG series servo motor). The
higher the creep speed, the greater the error of the home position.
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]
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Setting
Switch on MD0.
Switch off DI0 to DI7.
_ _ _ 9: Select the dog type front end
reference.
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.