Title: Accuracy correcting device for the open-loop (or partly closed-loop)system
Application Number: 85100125 Application Date: 1985.04.01
Publication Number: 1002038 Publication Date: 1986.07.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G05D3/18
Applicant(s) Name: Qinghua University Address:
Inventor(s) Name: Han Zhijun
Attorney & Agent: FU SHANGXIN
Abstract:
     This device is particularly suitable for the large machine tools for the reasons that such an accuracy can be obtained the order of which is same as the resolution of the measurement elements without changing the logic control circuit of said system, and that the errors will not be built up for the increasing path in case of using the additional rolled grating as measuring elements. The device includes a logic circuit for the automatic control of the switching, an analog loop being able to analogize the dynamic performaces of said system, a digital pulse comparing loop, an additional loop for automatically generating the correction pulse in response to the feeding instruction, and a correction pulse delayed counter used specially for performing the dynamic correction without loss of synchronization when said open-loop system being operated with a high speed.
Time: 4