Numerical control device with rational B-spline interpolator

Details Numerical control device with rational B-spline interpolator Numerical control device with rational B-spline interpolator

1991-10-31

1993-07-13

Smith, Jerry

Boots, shoes, and leggings

36447423, 318573, G05B 1918, G06F 1546

Patent

active

052279782

ABSTRACT:
A numerical control device for controlling a machine tool or a robot accepts a mixed program including both conventional G-codes and codes for nonuniform rational B-spline. The blocks of G-codes and rational B-spline codes are discriminated by a respective head code or symbol. Once a set of order, number of control points, and knot vector is input via code blocks of a program, the same setting for the B-spline basis functions is used for generation of the rational B-spline curves until a new set of order, etc., are input.

REFERENCES:
patent: 4591968 (1986-05-01), Nozawa et al.
patent: 4648024 (1987-03-01), Kato et al.
patent: 4797811 (1989-01-01), Kiyokawa et al.
"Programming for Numerical Control Machines", A. D. Roberts and R. C. Prentice, McGraw-Hill, Inc., 1968 (Japanese Version).
"Rational B-Splines for Curve and Surface", Wayne Tiller, Computer Graphics and Applications, 1983 IEEE.

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