Dog Type Rear End Reference Home Position Return - Mitsubishi Electric MELSERVO-J3 Series Manual

5. OPERATION

5.6.7 Dog type rear 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 moving distance and home position shift distance after it passed the rear end is defined as
a home position. A home position return that does not depend on the Z-phase signal can be made.
(1) Devices, parameters
Set the input devices and parameters as indicated below.
Item
Manual home position return mode
selection
Remote register-based
position/speed setting
(Only when two stations are
occupied)
Dog type rear end reference 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
POINT
This home position return method depends on the timing of reading Proximity
dog (DOG) that has detected the rear end of a proximity dog. Hence, if a
home position return is made at the creep 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 creep speed is higher.
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
Turn RYn6 ON.
RYnA to RYnE, RY(n 2)3 to RY(n 2)5 are
turned off.
Turn RY(n
Refer to section 5.6.1 (2) and select the home
position return direction.
Refer to section 5.6.1 (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
rear end.
Set the moving distance after the axis has
passed the proximity dog rear end.
Use the acceleration/deceleration time
constant of point table No.1.
Set the current position at home position return
completion.
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Description
2)A ON.
5: Select the dog type rear end
reference.