Grinding machine is widely used in the camshaft producing process. H187 slanting headstock camshaft grinding machine is upgraded from the original relay, contactor and other electronic controlled system into PMC controlled CNC machine tool by using FANUC 0i-TC system, which is not only to adapt to the current auto industry production mode of "more batches and more variety", but also to improve the production efficiency and the manufacturing quality. The upgrading process is introduced especially from the following aspects such as the design of CNC system architecture and electrical control system, development of grinding feed NC program and PMC program. It is proved that this transformation fully realized the expected goals from practice.
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