Mitsubishi Electric MELSERVO-J2 Series Instruction Manual page 98

4. OPERATION
4.4.3 Count type home position return
In count type home position return, a motion is made over the distance set in parameter No.43 (moving
distance after proximity dog) after detection of the proximity dog front end. The position where the first Z-
phase signal is given after that is defined as a home position. Hence, if the proximity dog (DOG) is 10ms
or longer, there is no restriction on the dog length. This home position return method is used when the
required proximity dog length cannot be reserved to use dog type home position return or when the
proximity dog (DOG) is entered electrically from a controller or the like.
(1) Signals, parameters
Set the input signals and parameters as follows:
Manual home position return
mode selection
Count type home position return
Home position return direction
Dog input polarity
Home position return speed
Creep speed
Home position shift distance
Moving distance after proximity
dog
Home position return
acceleration/deceleration time
constants
Home position return position
data
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Item
Automatic/manual selection (MD0)
Point table No. selection 1 (DI0)
Point table No. selection 2 (DI1)
Parameter No.8
Parameter No.8
Parameter No.8
Parameter No.9
Parameter No.10
Parameter No.11
Parameter No.43
Parameter No.1
Parameter No.42
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Device/Parameter Used
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Description
Short MD0-SG (ON).
Open DI0-SG (OFF).
Open DI1-SG (OFF).
1 : Count type home position return
is selected.
Refer to (3) in this section and choose
home position return direction.
Refer to (3) in this section and choose dog
input polarity.
Set speed until detection of dog.
Set speed after detection of dog.
Set when shifting the home position,
starting at the first Z-phase signal given
after passage of the proximity dog front end
and movement over the moving distance.
Set the moving distance after passage of
proximity dog front end.
Use the acceleration/deceleration time
constants of point table No.1.
Set the current position at home position
return completion.