
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
167/190
8470
Parameter for determining allowable acceleration in feedrate calculation
considering acceleration
[Data type] Word axis
[Unit of data] msec
[Valid data range] 0 to 32767
When the function for calculating the feedrate considering the acceleration is
used under automatic feedrate control, this parameter is used to determine the
allowable acceleration. The time required until the maximum cutting feedrate is
reached must be specified here.
Allowable acceleration is determined from the maximum cutting feedrate and
the value set in this parameter. Where, the maximum cutting feedrate is any of
value set in parameter No. 1432, 1430 or 1422. Which parameter No. is used
depends on the following conditions:
• When a value other than 0 is set to No. 1432, the value set to No. 1432 is
used.
• When 0 is set to No. 1432 and a value other than 0 is set to No. 1430, the
value set to No. 1430 is used.
• When 0 is set to No. 1432 and 1430, the value set to No. 1422 is used.
The shock of the machine and the processing error becomes small by setting this
parameter greatly.
8452 Range of velocity fluctuation to be ignored
[Data type] Byte
[Unit of data]
%
[Valid data range] 0 to 100 (Standard setting: 10)
Time
Speed
llowable acceleration
Max. cutting feedrate
(parameter No.1432, 1430,
or 1422)
Parameter No.8470