抄録
This paper describes an NC Simulator GP / SIM based on a newly proposed 3 D-solid model. The main purposes of GP / SIM are to precheck an NC data by using the simulation techniques and then to make the expected production period shorten. GP /SIM proposes a new theory of a hierarchy solid modeling (CSG model) and also developed new algorithms to simulate the aspect of machining. Therefore, GP / SIM is able to verify throughout the machining process beforehand. After the development of the system, whole of algorithms and theories were confirmed on engineering work station and real machining shop.