16.12.12 Dog type front end reference home position return type
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. The higher the creep speed, the
greater the error of the home position.
The home position is where the machine moves the travel distance after proximity dog and the home
position shift distance from the front end of a proximity dog.
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.
Automatic operation mode of
the program method
MD0 (Operation mode selection 1)
Dog type front end reference
home position return
_ _ _ 9: Select the dog type (front end detection/
front end reference).
Home position return
direction
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.
Home position return speed
Set the rotation speed until a dog is detected.
Set the rotation speed after a dog is detected.
Home position shift distance
Set this item to move the home position set when
the Z-phase signal is given.
Travel distance after
proximity dog
Set the travel distance specified after the front end
of the proximity dog is passed.
Home position return
acceleration time constant
The acceleration time constant set for [Pr. PC30]
is used.
Home position return
deceleration time constant
The deceleration time constant set for [Pr. PC31]
is used.
Home position return position
data
Set a current position at home position return
completion.
DI0 (Program No. selection 1) to
DI7 (Program No. selection 8)
Select a program containing "ZRT" command that
performs a home position return.
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