8. Parameter
315
[109] Home preset value (Parameter No.139)
No. Name Symbol Unit Input Range
Default factory
setting
139 Home preset value PRST mm
-9999.99 to
9999.99
In accordance
with actuator
For the actuator of absolute specification, set this parameter so that (home return offset + value
of this parameter) is within the range between 0 and the ball screw lead.(as it is necessary to
register the Z-phase nearest to the mechanical end as the datum)
The value should be an integer multiple of ±(ball screw lead length) including 0.00.
(If the home return offset is within the range between 0 and ball screw lead length, the value of
this parameter is 0.00.)
Also, when a value other than 0.00 is set in this parameter, home-return complete position
cannot be 0.00, and it gets to the positon of home position + this parameter.
For the actuator of incremental specification, always set this parameter to 0.00.
<Setting example 1>
With ball screw lead length 4mm and home return offset level 10mm, set this parameter to
-8mm.
Caution: If the above condition is not satisfied, the home position at restart after home
return may shift by an integer multiple of the ball screw lead.
Home Return Offset Level (10mm)
Home position preset value (-8mm)
Home return
completion position
[-8mm]
Ball Screw Lead Length (4mm) Ball Screw Lead Length (4mm) Ball Screw Lead Length (4mm)
Home Position
[0mm]
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