
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
133/190
• Setting a permissible acceleration change level
Parameter No.19522 is used to set a permissible acceleration change level for
each axis. The permissible acceleration change level is a rate per ms. If a
parameter value is 0, speed control based on changes to acceleration is not
performed for the axis that corresponds to that parameter value.
• Example of parameter setting
As the figure below, the arc radius is 10mm and feedrate is 6000mm/min are
commanded, the amount of the acceleration change of Y axis is :
2
2
/1000 smm
r
v
=
Y
X
Y Axis
acceleration
cceleration
Time
Line to arc
F 6000mm/min
mount of the
acceleration
change
1000mm/s
2
rc radius 10mm
To control this acceleration change to 300mm/s
2
, it is set in Y axis of parameter
No.19522 as 300mm/s
2
.
However, it is likely to differ from the theory value because the acceleration
change is judged according to the data at each interpolation of CNC.
Moreover, there is an influence at the acc/deceleration etc. , and a set value is
decided in an actual machine while adjusting it.