Direct numerical control (DNC) system including one high-speed data processing unit for each NC machine tool

A DNC system for controlling a plurality of NC machine tools connected to one host computer, comprising:

• a plurality of high-speed data processing units provided for each of said plurality of NC machine tools, respectively, each to distribute command information transmitted from said one host computer to each of said respective NC machine tools;
• and
• data input means, connected to said one host computer, for inputting a specified one of said plurality of NC machine tools and for inputting set-up data for said specified NC machine tool, said host computer then setting and transmitting only NC machining data, read from a memory of said host computer and corresponding to said specified NC machine tool, for one process and said set-up data, for changing a set-up for machining, for a next process in an operation schedule of the specified NC machine tool to a high-speed data processing unit corresponding to the specified NC machine tool,
• said corresponding high-speed data processing unit further receiving and storing the transmitted NC machining data for said one process and the transmitted set-up data for the next process, and converting the transmitted set-up data into NC set-up data and transmitting the converted NC set-up data to an NC unit of the specified NC machine tool and transmitting the NC machining data to the NC unit of the specified NC machine tool.

A DNC system for controlling a plurality of NC machine tools connected to one host computer, comprising:

• a plurality of high-speed data processing units provided for each of said plurality of NC machine tools, respectively, each to distribute command information transmitted from said one host computer to each of said respective NC machine tools;
• and
• data input means, connected to said host computer, for inputting a specified one of said plurality of NC machine tools and for inputting set-up data for said specified NC machine tool, said host computer then setting and transmitting NC machining data, read from a memory of said host computer and corresponding to said specified NC machine tool, for all processes of an operation schedule to be covered by the specified NC machine tool and transmitting the set-up data, for changing a set-up for machining, of said all process of said operation schedule, to a high-speed data processing unit corresponding to the specified NC machine tool which stores the transmitted data in a memory, and when said corresponding high-speed data processing unit receives the NC machining data and the set-up data for said all processes of said operation schedule, said corresponding high-speed data processing unit converts the set-up data into NC set-up data and stores the converted NC set-up data in said memory, thereby sequentially transmitting the stored NC set-up data and NC machining data to a memory of an NC unit for the specified NC machine tool, in every predetermined cycle.