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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 PC or PLC...etc or the like.
(1) Devices and parameters
Set the input devices and parameters as follows.
Item
Device/Parameter used
Description
Manual home position return
mode selection
Automatic/manual selection (MD0)
Turn MD0 ON.
Point table No./Program No.
selection 1 to 3 (DI0 to DI2)
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.
Count type home position return Parameter No. PE03
1: Count type home position return is selected.
Home position return direction
Parameter No. PE03
Refer to section 13.6.1 (2) and select the home position
return direction.
Dog input polarity
Parameter No. PE03
Refer to section 13.6.1 (2) and select the dog input
polarity.
Home position return speed
Parameter No. PE04
Set the speed till the dog is detected.
Creep speed
Parameter No. PE05
Set the speed after the dog is detected.
Home position shift distance
Parameter No. PE06
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.
Travel distance after proximity
dog
Parameter No. PE09
Set the travel distance after passage of proximity dog
front end.
Home position return
acceleration/deceleration time
constants
Parameter No. PE07
Set the acceleration/deceleration time constants during
a home position return.
Home position return position
data
Parameter No. PE08
Set the current position at home position return
completion.