File conversion apparatus for machining program of numerical control system and computer readable recording medium for storing program for computer to execute file conversion process

A file conversion apparatus operating on a computer to convert a source file into a destination file for a machining program for a numerical control system comprising:

• a conversion unit that receives a machining program for said numerical control system, including a NURBS interpolation command as a source file, and leaves portions other than the NURBS interpolation command portion as they are and converts the NURBS interpolation command portion into a minuscule line segment interpolation command while analyzing the input machining program sequentially;
• a conversion unit for leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a spline interpolation command;
• a conversion unit for leaving portions other than NURBS interpolation command portion as they are and converting the NURBS interpolation command into a NURBS interpolation command of a differently presented specification;
• and
• a conversion mode setting unit for selectively setting any one of said three conversion unit, wherein the destination file is generated by leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command portion into a minuscule line segment interpolation command, a spline interpolation command or a NURBS interpolation command of a differently presented specification in accordance with the conversion mode selectively set by said conversion mode setting unit.

A computer readable recording medium having stored therein a program for the computer to execute, said program including directions for:

• inputting a machining program for a numerical control system including a NURBS interpolation command as a source file;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a minuscule line segment interpolation command while sequentially analyzing the input machining program;
• and
• writing in the destination file the data obtained by leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a minuscule line segment interpolation command.

A computer readable recording medium having stored therein a program for the computer to execute, said program including directions for:

• inputting a machining program for a numerical control system including a NURBS interpolation command as a source file;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a spline interpolation command while sequentially analyzing the input machining program;
• and
• writing in a destination file the data obtained by leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a spline interpolation command.

A computer readable recording medium having stored therein a program for the computer to execute, said program including directions for:

• inputting a machining program for a numerical control system, including a NURBS interpolation command as a source file;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a spline interpolation command while sequentially analyzing the input machining program;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a NURBS interpolation command of a differently presented specification;
• and
• writing in a destination file the data obtained by leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a NURBS interpolation command of a differently presented specification.

A computer readable recording medium having stored therein a program for the computer to execute, said program including directions for:

• inputting a machining program for a numerical control system, including a NURBS interpolation command as a source file;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a minuscule line segment interpolation command while sequentially analyzing the input machining program;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a spline interpolation command;
• leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a NURBS interpolation command of a differently presented specification;
• a conversion mode setting step of selectively setting any one of said three conversion steps;
• and
• writing in the destination file the data obtained by leaving portions other than the NURBS interpolation command portion as they are and converting the NURBS interpolation command into a minuscule line segment interpolation command, a spline interpolation command or a NURBS interpolation command of a differently presented specification, in accordance with the conversion mode selected in said conversion mode.