
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
98/190
• Feedrate during cutting point compensation
(1) The tool moves at a specified feedrate while cutting point compensation is
being applied between blocks.
(2) The actual speed indication and feedrate during circular interpolation are as
described below.
Actual speed indication
The speed component of each axis after cutting point compensation at a point
in time during circular interpolation is as follows:
FzFz'
- - - Speed component of linear axis
Vcs)-(VceFcFc'
- - - Speed component of rotation axis
180
r
Vcs)-(Vce-Fy'
π
=
- - - Speed component of offset axis
Fz : Speed component of a cylindrical interpolation linear
axis before cutting point compensation
Fc : Speed component of cylindrical interpolation rotation
axis before cutting point compensation
Vcs: Rotation axis component of a tool contact point vector
(Vs in the figure) at the start point at a point in time
Vce: Rotation axis component of tool contact point vector
(Ve in the figure) at the end point at a point in time
r : Radius of the cylinder of a rotation axis
Accordingly, the actual speed indication during circular interpolation is
greater than the specified value when |Fc’| > |Fc|(inner offset of the
arc). Conversely, the actual speed indication during circular
interpolation is less than the specified value when |Fc’| < |Fc|(outer
offset of the arc).
Fig.2.21.3 (g) Actual Speed Indication during Circular Interpolation
Z-axis
C-axis
Y-axis
Pro
rammed path
Vs
Fc
Vce
Ve
Vcs
Tool
Fz = Fz’
Fc’