
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
91/190
2.21 Cutting Point Compensation for Cylindrical Interpolation
2.21.1 Outline
The conventional cylindrical interpolation function controls the tool center so
that the tool axis always moves along a specified path on the cylindrical surface,
towards the rotation axis (cylindrical axis) of the workpiece. On the other hand,
this function controls the tool so that the tangents to the tool and a contour
figure cutting surface always pass through the rotation center of a workpiece
As shown in Fig.2.21.1 (a), control is exercised along the offset axis (Y-axis)
direction that is perpendicular to the tool, tool center axis, and workpiece
rotation center axis. Therefore, contour figure on the cutting side can be
assumed to be the same anytime without depending on the amount of the cutter
compensation.
This function is an additional option.
Fig. 2.21.1 (a) Comparison with Conventional Interpolation
Workpiece
Rotation Rotation
Tool
Tool center
Y-axis
Conventional cylindrical
interpolation
Cylindrical interpolation
with this function
Cutting side
Command Position
Cutting side
Command Position
Rotation
Cutting side
Command Position
Rotation
Cutting side
Command Position
Y-axis
In the case of the amount of the cutter compensation is large;
Shape on the cutting side changes
depending on the amount of cutter
compensation because the tool pat
is compensated by moving the
rotation axis.
Shape on the cutting side does no
depend on the amount of cutte
compensation by moving the Y axis
The cutting side is always vertica
to the cylinder.