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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A Study of the Torque Compensating Phase on the Positioning Accuracy of Indexing Tables

Ho, Sheng-Ying 05 July 2001 (has links)
Recently, many industries pursue the goal of automatic high-speed assembly and manufacturing. So how to meet the requirement of high-precision and high-speed automatic assembly equipment is an important issue. In automatic assembly equipment, the high-speed indexing devices have been widely used because of their features of high precision, no backlash, and compactness. With increasing operating speeds, the problems of shortage of motor power, poor indexing accuracy, vibration, and noise shall be solved. The torque compensation mechanism that is to be developed here is applied to keep motors operating at constant speeds by compensating the required torque. In previous researches, the researchers all devote to study torque compensation based on synchronous time chart. In this paper, it is aimed at compensation of the time control chart according the point of view of energy and the system model is built to simulate dynamic response of the system. Through the results of simulation and experiment, we will discover the relations between the compensation time chart and parameters about the high-speed indexing devices. It is expected to improve the precision of indexing devices according to those effective compensation time control charts.
2

Single Platform Relative Positioning for Sensor Stabilization

Dickman, Jeff 18 July 2008 (has links)
No description available.
3

Online korekce geometrických a rozměrových odchylek / Online correction of geometric and dimensional deviations

Plichta, Zbyněk January 2017 (has links)
The thesis deals with a development and application of laser interferometer system for the online error calibration of CNC machine tool. The term „online“ means, that laser interferometer is permanently built in the machine tool. Therefore particular error measurements can be done in very short time period.

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