Count Type Home Position Return - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

4. HOW TO USE THE POINT TABLE

4.4.3 Count type home position return

In the count type home position return, after the proximity dog front end is detected, the motor travels the
distance set with [Pr. PT09 Travel distance after proximity dog]. Then, the position specified by the first Z-
phase signal is used as the home position. Therefore, when DOG (Proximity dog) is on for 10 ms or longer,
the proximity dog length has no restrictions. When the required proximity dog length for using the dog type
home position return cannot be reserved, or when DOG (Proximity dog) is entered electrically from the
controller or the like, use the count type home position return.
(1) Device/parameter
Set input devices and parameters as follows.
Item
Home position return mode
selection
Count type home position
return
Home position return
direction
Dog input polarity
Home position return speed
Creep speed
Home position shift distance
Travel distance after proximity
dog
Home position return
acceleration/deceleration time
constant
Home position return position
data
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]
[Pr. PT09]
Point table No. 1
[Pr. PT08]
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Setting
Switch on MD0.
Switch off DI0 to DI7.
_ _ _ 0: Select the count 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
starting at the first Z-phase signal after
passage of proximity dog front end and
motion over the specified travel distance.
Set the travel distance after passage of
proximity dog front end.
Use the acceleration/deceleration time
constant of point table No. 1.
Set the current position at the home position
return completion.