Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 405

13. POSITIONING MODE
13.6.4 Count type home position return
In count type home position return, a motion is made over the distance set in parameter No. PE09 (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 and parameters
Set the input devices and parameters as follows.
Item
Manual home position return
mode selection
Count type home position return
Home position return direction
Dog input polarity
Home position return speed
Creep speed
Home position shift distance
Travel distance after proximity
dog
Home position return
acceleration/deceleration time
constants
Home position return position
data
Device/Parameter used
Automatic/manual selection (MD0)
Point table No./Program No.
selection 1 to 3 (DI0 to DI2)
Parameter No. PE03
Parameter No. PE03
Parameter No. PE03
Parameter No. PE04
Parameter No. PE05
Parameter No. PE06
Parameter No. PE09
Parameter No. PE07
Parameter No. PE08
13 - 54
Description
Turn MD0 ON.
Point table method: Select the home position return
mode by turning OFF DI0, DI1 and
DI2.
Program method: Select a program that has the home
position return "ZRT" command.
1: Count type home position return is selected.
Refer to section 13.6.1 (2) and select the home position
return direction.
Refer to section 13.6.1 (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 shifting the home position, starting at the first
Z-phase signal given after passage of the proximity dog
front end and movement over the travel distance.
Set the travel distance after passage of proximity dog
front end.
Set the acceleration/deceleration time constants during
a home position return.
Set the current position at home position return
completion.