Characteristic Comparison of 3 Kinds of Leadscrews Used for Ultraprecision Positioning
| Autor: | Jiro Otsuka, Yoshihiro Kawase, Sigeo Fukuda, Yoshito Aoki |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Engineering
business.industry Mechanical Engineering Mechanical engineering Proportional control Ball screw Servomotor Industrial and Manufacturing Engineering Displacement (vector) Computer Science::Robotics Vibration Condensed Matter::Materials Science Step response Mechanics of Materials Control theory Damping factor business Friction torque |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 57:3293-3299 |
| ISSN: | 1884-8354 0387-5024 |
| Popis: | The characteristic comparison of three kinds of leadscrews (a precision sliding screw, a precision ball screw and a rolled ball screw) is described on the one-dimensional ultraprecision positioning apparatus with a position feedback system in the PTP method. The followings are clarified ; (1) Since the damping factor of the ball screw is ten times smaller than that of the sliding screw, the table response using the ball screw is sharper and shows a larger vibration, (2) when three kinds of leadscrews have the same friction torque at low speed, the relationship between the variation of the friction torque and the positioning error is clarified from the quantified point of view by a step response using the proportional control. (3) The relationship between the electric current of the DC servomotor and the table displacement in the step response under sub-micronmeter stroke is of stick-slipping characteristic for the sliding screw and of elastic characteristic for the ball screw. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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