Dog Type Front End Reference Home Position Return Type - Mitsubishi MR-JE-200A Instruction Manual

5. HOW TO USE THE PROGRAM

5.4.11 Dog type front end reference home position return type

A position, which is shifted by the travel distance after proximity dog and the home position shift distance
from the front end of the proximity dog, is set 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
Automatic operation mode of
the program method
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
Acceleration time constant of
home position return
Deceleration time constant of
home position return
Home position return position
data
Program
POINT
This home position return method depends on the timing of reading DOG
(Proximity dog) that has detected the front end of the 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 200 pulses (for HG series servo motor). The
higher the creep speed, the greater the error of the home position.
Device/parameter to be used
MD0 (Operation mode selection 1)
[Pr. PT04]
[Pr. PT04]
[Pr. PT29]
[Pr. PT05]
[Pr. PT06]
[Pr. PT07]
[Pr. PC30]
[Pr. PC31]
[Pr. PT08]
DI0 (Program No. selection 1) to
DI3 (Program No. selection 4)
Switch on MD0.
_ _ _ 9: Select the dog type (front end
detection/front end 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.
Set this to shift the home position, which is
specified by the Z-phase signal.
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.
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Setting