Count Type Home Position Return - Mitsubishi MR-JE-200A Instruction Manual

5. HOW TO USE THE PROGRAM

5.4.3 Count type home position return

For the count type home position return, after the front end of the proximity dog is detected, the position is
shifted by the distance set in [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 the on-time of DOG (Proximity dog) is
10 ms or more, the length of the proximity dog has no restrictions. Use the count type home position return
when you cannot use the dog type home position return because the length of the proximity dog cannot be
reserved, when you input DOG (Proximity dog) electrically from the controller, or other cases.
(1) Device/parameter
Set input devices and parameters as follows:
Item
Automatic operation mode of
the program method
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
Acceleration time constant of
home position return
Deceleration time constant of
home position return
Home position return position
data
Program
Device/parameter to be used
MD0 (Operation mode selection 1)
[Pr. PT04]
[Pr. PT04]
[Pr. PT29]
[Pr. PT05]
[Pr. PT06]
[Pr. PT07]
[Pr. PT09]
[Pr. PC30]
[Pr. PC31]
[Pr. PT08]
DI0 (Program No. selection 1) to
DI3 (Program No. selection 4)
5 - 42
Setting
Switch on MD0.
_ _ _ 1: Select the count type (front end detection
Z-phase reference).
Refer to section 5.4.1 (2) to select the home
position return direction.
Refer to section 5.4.1 (2) to select the dog input
polarity.
Set the rotation speed specified until a dog is
detected.
Set the rotation speed specified after a dog is
detected.
After the front end of the proximity dog is passed,
the position is shifted by the travel distance and
then is specified by the first Z-phase signal. Set
this to shift the position of the first Z-phase signal.
Set the travel distance specified after the front end
of the proximity dog is passed.
The acceleration time constant set for [Pr. PC30]
is used.
The deceleration time constant set for [Pr. PC31]
is used.
Set the current position when the home position
return completed.
Select a program containing a "ZRT" command,
which performs the home position return.