Count Type Home Position Return - Mitsubishi Electric MELSERVO-J3 Series Instruction Manual

5. OPERATION

5.6.3 Count type home position return

In count type home position return, a motion is made over the distance set in parameter No.PC08 (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) Devices, parameters
Set the input devices and parameters as follows.
Item
Manual home position return mode
selection
Remote register-based
position/speed setting
(Only when two stations are
occupied)
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 Parameter No.PC08
Home position return
acceleration/deceleration time
constants
Home position return position data
Device/Parameter used
Automatic/manual selection (RYn6)
Point table No. selection 1 to 8
(RYnA to RYnE, RY(n 2)3 to RY(n 2)5)
Position/speed specifying system selection
(RY(n 2)A)
Parameter No.PC02
Parameter No.PC03
Parameter No.PD16
Parameter No.PC04
Parameter No.PC05
Parameter No.PC06
Point table No.1
Parameter No.PC07
5 - 36
Description
Turn RYn6 ON.
RYnA to RYnE, RY(n 2)3 to RY(n 2)5 are
turned off.
Turn RY(n 2)A ON.
1 : Count type home position return is
selected.
Refer to section 5.6.1 (2) and choose home
position return direction.
Refer to section 5.6.1 (2) 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.