Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 413

13. POSITIONING MODE
13.6.9 Count type front end reference home position return
The position where the axis, which had started decelerating at the front end of a proximity dog, has moved the
after-proximity dog travel distance and home position shift distance is defined as a home position. A home
position return that does not depend on the Z-phase signal can be made. The home position may change if the
home position return speed varies.
(1) Devices and parameters
Set the input devices and parameters as indicated below.
Item
Manual home position return
mode selection
Count type dog front end
reference 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
constants
Home position return position
data
POINT
This home position return method depends on the timing of reading the
proximity dog (DOG) that has detected the front end of a proximity dog.
Hence, if a home position return is made at the home position return speed of
100r/min, an error of 400 pulses will occur in the home position. The error of
the home position is larger as the home position return speed is higher.
Device/Parameter used
Automatic/manual selection (MD0)
Point table No./Program No.
selection 1 to 3 (DI0 to DI2)
Parameter No. PE03
Parameter No. PE03
Parameter No. PE03
Parameter No. PE04
Parameter No. PE05
Parameter No. PE06
Parameter No. PE09
Parameter No. PE07
Parameter No. PE08
Turn MD0 ON.
Point table method: Select the home position return
Program method: Select a program that has the home
6: Select the count type dog front end reference.
Refer to section 13.6.1 (2) and select the home position
return direction.
Refer to section 13.6.1 (2) and select the dog input
polarity.
Set the speed till the dog is detected.
Set the speed after the dog is detected.
Set when the home position is moved from where the
axis has passed the proximity dog front end.
Set the acceleration/deceleration time constants during
a home position return.
Set the current position at home position return
completion.
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Description
mode by turning OFF DI0, DI1 and
DI2.
position return "ZRT" command.