
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
111/190
• Feedrate control conditions
In automatic feedrate control mode, the feedrate for the tool is controlled as
described below.
(a)
The feedrate required at a corner is calculated from the specified feedrate
difference at the corner along each axis, the tool being decelerated to the
calculated feedrate at the corner.
N2N1
Specified
feedrate
N3 t
N1
N2
N3
Example
(b) The feedrate required in a block is calculated from the specified acceleration
along each axis at the start point and end point of the corner, the tool being
decelerated so that the feedrate in the block does not exceed the calculated
feedrate.
N2 N3 N6 N7N1 N8 t
N1
N2
N3
Exam
le
N7
N6
N4
N5
N8
Specified
feedrate
(c) The feedrate required in a block is calculated from the angle of downward
movement along the Z–axis, the tool being decelerated so that the feedrate in
the block does not exceed the calculated feedrate.
N2N1 N3 t
N1
N2
N3
Z
Example
Specified
feedrate