Mitsubishi Electric MELSERVO MR-J3-xT, Instruction Manual

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5. STARTUP
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) Signals, parameters
Set the input devices and parameters as follows:
Item Device/Parameter used Description
Automatic/manual selection (RYn6) Turn RYn6 ON.
Manual home position return mode
selection
Point table No. selection 1 to 8
(RYnA to RYnE, RY(n+2)3 to RY(n+2)5) RYnA to RYnE, RY(n+2)3 to RY(n+2)5 are
turned off.
Count type home position return Parameter No.PC02
1 : Count type home position return is
selected.
Home position return direction Parameter No.PC03
Refer to section 5.6.1 (2) and choose home
position return direction.
Dog input polarity Parameter No.PD16
Refer to section 5.6.1 (2) and choose dog
input polarity.
Home position return speed Parameter No.PC04 Set speed until detection of dog.
Creep speed Parameter No.PC05 Set speed after detection of dog.
Home position shift distance Parameter No.PC06
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.PC08
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.PC07
Set the current position at home position
return completion.