Buffered DDA command generation in a CNC

摘要

In a computerized numerical controller (CNC), interpolating more than one block in a sampling interval, increases the feed rate. Some commands skipped by the generator are pre-saved in a circular buffer, to provide faster operation than that of a conventional digital differential analyzer. The feed rate can be increased when programmed distances are short. The high feed rate is confirmed by installing the buffered command generation algorithm in the motion board that includes a digital signal processor. The feed rate can reach 11.6m/min, when minimal (1 μm) distance is programmed in all blocks.