Mitsubishi Electric MELSERVO MR-J4-03A6-RJ, Instruction Manual

Page: 178 / 610

4. HOW TO USE THE POINT TABLE
4 - 51
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 Used device/parameter Setting
Home position return mode
selection
MD0 (Operation mode selection 1) Switch on MD0.
DI0 (Point table No. selection 1) to
DI7 (Point table No. selection 8)
Switch off DI0 to DI7.
Count type home position
return
[Pr. PT04] _ _ _ 0: Select the count type.
Home position return
direction
[Pr. PT04]
Refer to section 4.4.1 (2) to select the home
position return direction.
Dog input polarity [Pr. PT29]
Refer to section 4.4.1 (2) to select the dog
input polarity.
Home position return speed [Pr. PT05]
Set the rotation speed until the dog is
detected.
Creep speed [Pr. PT06]
Set the rotation speed after the dog is
detected.
Home position shift distance [Pr. PT07]
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.
Travel distance after proximity
dog
[Pr. PT09]
Set the travel distance after passage of
proximity dog front end.
Home position return
acceleration/deceleration time
constant
Point table No. 1
Use the acceleration/deceleration time
constant of point table No. 1.
Home position return position
data
[Pr. PT08]
Set the current position at the home position
return completion.
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