IDENTIFICATION OF MAXIMUM INACCURACY OF TOOLMAKERS MICROSCOPE

Abstract

Urgency of the research. There are several types of measurement devices. Industrial practice needs simple, fast and cheap measurement system for inspection of produced parts. There is a need for system like toolmakers microscope. Target setting. Toolmakers microscope is very popular because of its simplicity, but producer often do not provide information about the errors during the measurements. Actual scientific researches and issues analysis. Toolmakers microscope uses two methods of measurements – micrometer head slides in two axes XY and CCD camera for measurements of very small dimensions. Uninvestigated parts of general matters defining. The main problem is with expressing of uncertainty of measurements for both methods of measurements. There is no regulations and recommendation for using of both methods. The question of the probability distribution of measured values and number of minimum required measurements are uninvestigated, because the next research will be focused to this are. The research objective. The aim is to obtain maximum permissible error of explored toolmakers microscope. On the base of this the uncertainty of measurement could be expressed. Uncertainty measurement is non-separable parts of measurement results. The statement of basic materials. Gauge length blocks have been used for calibration of both measurement systems. Maximum permissible error has been estimated as math model for next using. Conclusions. The toolmakers microscope is suitable device for fast and cheap measurement right in industry condition. The producer did not provide information about the accuracy of measurement on this device. Calibration process can be used for estimation of this maximum error achieved during the measurement via using this device. Also this approach can be used for estimation of actual condition of measuring device.