| 摘要 |
<p>A main CPU unit is connected through a but to a plurality of CNC units which correspond to machine tools. The main CPU unit is also connected to an external storage and to an input device. When operation control of the machine tools and machining data of works are changed, a new system program is down-loaded to CPU for the CNC units from the external storage through RAM of the main CPU unit to modify a part program, containing machining data, which is usually stored in the CPU for the CNC units.</p> |
