
A-78640E
Sheet
Title
Draw
No.
04 Feb.08.’03 Part of (4) is added or modified. Addition of 2.16.5
03 Jul.02.’02 A. Fukumoto Part of (3) is added or modified. T.Endo
02 May.13.’02 A. Fukumoto Addition of Tool Radius control for 5-axis machining etc T.Endo
Ed. Date Design Description
Date Jan.25.’02 Desig. A.Fukumoto Apprv. T.Endo
FANUC Series 16i /18i -TB
Specifications of AI High-Precision Contour Control /
I Nano High-Precision Contour control
115/190
The method of determining the feedrate with the acceleration differs depending
on the setting of parameter FNW (bit 6 of No. 19500).
If "0" is set, the highest feedrate that does not cause the permissible acceleration
set for parameter No. 8470 to be exceeded is assumed to be the deceleration
feedrate. In this case, the deceleration feedrate differs depending on the travel
direction even if the shape is the same, as shown in the figure below.
(Example) If a circular shape with a radius of 10 mm is specified with small line blocks
Parameter FNW (bit 6 of No. 19500) = 0
Permissible acceleration = 1000 mm/s
2
(on all axes)
The feedrate is highe
in these directions.
Tangent feedrate
Time
F6000
If "1" is set, the feedrate is determined with not only the condition that the
permissible acceleration on each axis is not exceeded but also the condition that
the deceleration feedrate is constant regardless of the travel direction if the
shape is the same.
If 1 is set for this parameter, the deceleration feedrate determined with the
feedrate difference or acceleration may be up to 30% lower than that determined
if 0 is set.
(Example) If a circular shape with a radius of 10 mm is specified with small line blocks
Parameter FNW (bit 6 of No. 19500) = 1,
radius = 10 mm, permissible acceleration = 1000 mm/s
2
(on all axes)
The tangent feedrate
is constant.
Tangent feedrate
Time
F6000
Note
In circular interpolation, the tangent feedrate is constant regardless of
the setting of the parameter.