Actuators for high speed high accuracy co-ordinate measuring machines

Author

McIntyre, J. ; Katebi, M R ; Lee, T. ; Grimble, M.J. ; Frew, R.W. ; Purves, W.K. ; Adams, N.

Author_Institution

Ind. Control Unit., Strathclyde Univ., Glasgow, UK

fYear

1991

fDate

33518

Firstpage

42583

Lastpage

42585

Abstract

Describes the Ferranti MIDAS co-ordinate measuring machine (CMM) which consists of three orthogonal axes in X, Y and Z and a Renishaw PH10 two degree of freedom probe capable of rotating ±180° about the probe axis and 0 to 105° perpendicular to the axis. The machine axes are controlled by independent servo loops consisting of a pulse width modulated current amplifier, three phase brushless servomotors with incremental shaft encoders, preamp component for signal conditioning and velocity loop control and a position controller implemented in software and downloaded to transputer. The position loop transducer is a fixed optical grating parallel to each axis of 50 lines/mm

Keywords

actuators; computerised instrumentation; position control; pulse width modulation; servomechanisms; servomotors; spatial variables measurement; velocity control; Ferranti MIDAS co-ordinate measuring machine; Renishaw PH10 two degree of freedom probe; computerised instrumentation; fixed optical grating; incremental shaft encoders; position controller; position loop transducer; preamp component; pulse width modulated current amplifier; servo loops; signal conditioning; three phase brushless servomotors; velocity loop control;

fLanguage

English

Publisher

iet

Conference_Titel

Robot Actuators, IEE Colloquium on

Conference_Location

London

Type

conf

Filename

182392