Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2006-09-19
2006-09-19
Picard, Leo (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S181000, C318S570000
Reexamination Certificate
active
07110854
ABSTRACT:
A numerical control apparatus for machine tool, including: an NC program storage portion; an electronic cam data transformation unit which transforms an NC program into electronic cam data; a constant circumferential velocity control command detection unit which detects whether a command for executing constant circumferential velocity control is present or not in the NC program; a reference axis pitch setting unit which sets the pitch for generating data; a main shaft rotational velocity calculation unit which calculates the rotational velocity of a main shaft on the basis of parameters corresponding to the position of a cutting edge of a tool; an axial feed velocity calculation unit which calculates axial feed velocity on the basis of the calculated rotational velocity of the main shaft; and an axial position data computing unit which calculates axial position on the basis of the axial feed velocity obtained at intervals of the set pitch.
REFERENCES:
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patent: 6182544 (2001-02-01), Chen
patent: 6400998 (2002-06-01), Yamazaki et al.
patent: 6909937 (2005-06-01), Sugiyama et al.
patent: 1 071 002 (2001-01-01), None
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Concise Statement of Relevancy for JP-A-2001-170843 (1 page).
Patent Abstracts of Japan, Publication No. 2001-170843, publication date: Jun. 26, 2001 (1 page).
European Search Report dated Feb. 21, 2006.
Osha Liang L.L.P.
Picard Leo
Rao Sheela S.
Star Micronics Co. Ltd.
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