Numerical controller

Details Numerical controller Numerical controller

2007-04-23

2008-10-07

Bahta, Kidest (Department: 2123)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C700S170000

Reexamination Certificate

active

07433754

ABSTRACT:
A numerical controller configured to enable machining of a conical surface such that vectors at a start point, an end point, and an interpolation point of a circular arc and their extensions never cross one another. Normal direction vectors Vnors and Vnore, tangential direction vectors Vtans and Vtane, and tool posture vectors Vts and Vte at the starting and end points are obtained based on programmed positions PA′ and PB′ of the starting and end points, a circle center position, and rotational positions of two rotary axes. Based on these vectors, tangential direction angles as and ae and the normal direction angles bs and be with respect to tool postures at the starting and end points are obtained. Normal and tangential direction vectors Vnori and Vtani and angles ai and bi at the interpolation point are obtained by interpolating the normal and tangential direction vectors and angles at the starting and end points, whereby a tool posture vector Vti at the interpolation point is obtained. The rotational positions of the rotary axes and positions of linear axes are obtained based on the tool posture vector Vti at the interpolation point. Circular machining can be also performed for a three-dimensional programmed circular arc.

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Notice of Reasons for Rejection dated Jan. 24, 2008, and issued in corresponding Japanese Patent Application.
European Search Report dated May 14, 2008, issued in corresponding European Patent Application.

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