MITSUBISHI ELECTRIC MR-J2S- CP - Manual (Page 121)

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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.
Item Device/Parameter used Description
Automatic/manual selection (MD0) Short MD0-SG (ON).
Point table No. selection 1 (DI0) Open DI0-SG (OFF).
Manual home position return
mode selection
Point table No. selection 2 (DI1) Open DI1-SG (OFF).
Count type home position return Parameter No.8
1 : Count type home position return
is selected.
Home position return direction Parameter No.8
Refer to section 4.4.1 (2) and choose home
position return direction.
Dog input polarity Parameter No.8
Refer to section 4.4.1 (2) and choose dog
input polarity.
Home position return speed Parameter No.9 Set speed until detection of dog.
Creep speed Parameter No.10 Set speed after detection of dog.
Home position shift distance Parameter No.11
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.
Moving distance after proximity
dog
Parameter No.43
Set the moving distance after passage of
proximity dog front end.
Home position return
acceleration/deceleration time
constants
Point table No.1
Use the acceleration/deceleration time
constants of point table No.1.
Home position return position
data
Parameter No.42
Use to set the current position on
completion of home position return.
(2) Timing chart
Movement finish (MEND)
Rough match
(CPO)
Home position return
completion (ZP)
Servo motor speed
Z-phase
Proximity dog (DOG)
Forward rotation
start (ST1)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
5ms or more
3ms or less
Proximity dog
Home position
shift distance
Parameter No. 11
Home position address
Parameter No. 42
Home position return
speed Parameter No. 9 Point table No. 1
Acceleration time constant
Home position Creep speed
Parameter No. 10
Point table No. 1
Deceleration time
constant
Moving distance after
proximity dog
Parameter No. 43
ON
OFF Reverse rotation
start (ST2)
The parameter No.42 (home position return position data) setting value is the positioning address
after the home position return is completed.