Count Type Front End Reference Home Position Return - Mitsubishi Electric MELSERVO-J3 Series Manual

5. OPERATION

5.6.8 Count type front 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 is defined as a home position. A home
position return that does not depend on the Z-phase signal can be made. The home position may change if the
home position return speed varies.
(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)
Count type dog front 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
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 front end of a proximity dog. Hence, if a
home position return is made at the home position return 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 home position return 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
Parameter No.PC08
Point table No.1
Parameter No.PC07
5 - 44
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.
6: Select the count type dog
front end reference.
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.