ISO/EIA code converting method

A method for ISO/EIA code conversion, said method comprising the steps of:

• (a) receiving input numerical control data having an input code system corresponding to one of an ISO code and an EIA code;
• (b) converting the input numerical control data into an internal code;
• (c) storing the internal code produced by said converting in step (b);
• (d) designating one of the ISO code and the EIA code as an output code system;
• (e) converting the internal code stored in step (c) to the output code system to produce output numerical control data;
• and
• (f) outputting the output numerical control data.

An numerical control apparatus capable of using an ISO code and an EIA code, comprising:

• input means for receiving input numerical control data having an input code system corresponding to one of the ISO code and the EIA code;
• first conversion means for converting the input numerical control data into an internal code;
• storage means for storing the internal code;
• selection means for selecting one of the ISO code and the EIA code as an output code system;
• second conversion means for converting the internal code stored in said storage means to the output code system to produce output numerical control data;
• and
• output means for outputting the output numerical control data.

An ISO/EIA code conversion method in an NC data input/output apparatus which converts NC data based on an ISO code and an EIA code into NC data based on an internal code, stores the same, and converts the NC data based on the internal code into NC data based on the ISO code and EIA code and outputs the same, said method comprising the steps of:

• (a) providing a first conversion table for converting the ISO code and the EIA code into an internal code, and a second table for converting an internal code into the ISO code and the EIA code;
• (b) converting characters and numerals commonly using the ISO code and the EIA code into the same internal code using the first conversion table, and converting characters and numerals which do not make common use of the ISO code and the EIA code into separate internal codes;
• (c) storing the internal codes produced by said converting in step (b);
• (d) designating, at the time of output, one of the ISO code and EIA code as an output code system;
• (e) converting the internal codes, corresponding to a defined code in the output code system, into the output code system using the second conversion table to produce NC data and converting the internal codes corresponding to an undefined code in the output code system into a special code;
• and
• (f) outputting the defined code and not outputting the special code.