Affordable Access

Access to the full text

Design and Implementation of a Novel Vertical Precision Positioner

Authors
  • Abdi, Ali1
  • Shariat Panahi, Masoud1
  • Hairi Yazdi, Mohammad Reza1
  • Mazraeh, Saeed1
  • 1 University of Tehran, Tehran, Iran , Tehran (Iran)
Type
Published Article
Journal
International Journal of Precision Engineering and Manufacturing
Publisher
Korean Society for Precision Engineering
Publication Date
Sep 03, 2021
Volume
22
Issue
11
Pages
1861–1872
Identifiers
DOI: 10.1007/s12541-021-00576-0
Source
Springer Nature
Keywords
Disciplines
  • Regular Paper
License
Yellow

Abstract

Vertical precision positioning is distinguished from positioning in horizontal plane due to the presence of gravitational forces that work differently in “lifting” and “lowering” modes. Vertical positioners also need a “locking mechanism” to avoid the unintentional lowering of the platform. We present a vertical precision positioner that works according to the “stick–slip” phenomenon. Using an adjustable offset coupling, the linear motion of a piezoelectric actuator is converted to the rotational motion of a low friction lead screw which results in the vertical motion of the screw. A microcontroller can adjust the grip, and hence the friction, between the coupling and the lead screw to ensure the uniformity of motion in lifting and lowering modes. The dynamic model of the mechanism is extracted, and simulations are performed to discover how the peak voltage and frequency of the saw-tooth signal affect the stick–slip motion of the mechanism. Additionally, equations are verified by comparing simulation results and experiments. They can be used in the control system design in future works.

Report this publication

Statistics

Seen <100 times