
Explanation
A part program approximated by the sculptured surfaces with minute line segments is
normally approximated using line segments with a tolerance of about 10um. In
this case, the program specified point is often in the vicinity of the boundary of the
torelance. And, the command point has the rounding error in the least input
increment of CNC.
torelance
Specified point
Expected curve
In the Nano Smoothing mode, to make a smooth curve from the approximated
segment, two or more interpolation points are made between the specified points.
And, an expected curve is presumed from the interpolation point group made across
a lot of blocks which include pre-read.
The interpolation point has many the case which is adjacent to an expected curve
compared with the specified point .
The interpolation point is adjacent to an expected curve compared with the command
point. Moreover, the curve profile is forecast by using the crowd of the interpolation
point made from a lot of blocks which include the reading-ahead. Therefore, the
stable shape is made. The interpolation point is corrected by more detailed unit than
the least input increment of CNC in the range of the a tolerance. Therefore, the
influence by the round-off error can be reduced. In addition, Nano interpolation is
done on the curve made from this compensation interpolation point. Therefore, the
working surface smoothes.
Command point
Interpolate point
Compensated interpolation poin
Presumed shape
Tolerance
Edit
Apprv.
Desig.
Sheet
Title
Draw
No.
Date
Design
Descri
tion
Date
FANUC Series 16i–MB, 18i–MB, 18i–MB5
Nano Smoothing Specification
Dec.27.2001
Sheet
T.Horie
5/14
A-78975E