Quasi-Close Loop Control of NC Machine Tools

Qian Qian Wang; Yi Hui Feng; Yu Lin Wang

doi:10.4028/www.scientific.net/AMR.1061-1062.927

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1061-1062Quasi-Close Loop Control of NC Machine Tools

Quasi-Close Loop Control of NC Machine Tools

Abstract:

There are some problems existing in open loop system with stepping motor as driving motor, such as lower servo precision, without compensation for step losing of stepping motor and so on. This paper presented a new approach called quasi-close loop control. With the help of the method, the control accuracy will be similar to that of close loop system and can be obtained, and the system will have the same stability as that of open loop system. With MCS-51 single-chip microcomputer as control unit and grating scales for measuring displacement, a quasi-close loop control system was built on NC lathe. The practice shows that the quasi-close loop control system has advantages such as high control accuracy, good stability and high cost performance. It is suited to economical NC machine tools and has wide application prospects.