A software simulator of a numerical control (CNC) lathe is an educational methodological development intended for basic familiarization of novice machine building specialists with the principles of programming parts turning operations using standard GM code (Fanuc System A).The basis of the three-dimensional simulation model is a lathe with a classical arrangement of units, equipped with a CNC system, an eight-position turret, a three-jaw chuck, a tailstock, a coolant supply system and other machinery.