ISO INTERNATIONAL STANDARD 230-7 Second edition 2015-05-15 Test code for machine tools - Part 7: Geometric accuracy of axes of rotation Code d'essai des machines-outils - Partie 7: Exactitude géométrique des axes de rotation Reference number IS0 230-7:2015(E) ISO International Organization for Standardization @IS02015 vided by IHS under I ermitted without license from IHS IS0 230-7:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org Not for Resale, 2015/7/24 03:10:34 networking permited without license from IHS IS0 230-7:2015(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions. 3.1 General concepts. ..2 3.2 Error motion terms. 3.3 Consequences of axis of rotation error motion ..8 3.4 Directionaldecompositionofaxisofrotationerrormotion ..10 3.5 Decomposition of measured axis of rotation error motion based on rotational frequency. ..11 3.6 Terms for axis of rotation error motion polar plots ..12 3.7 Terms for axis of rotation error motion polar plot centres. .14 3.8 Terms for axis of rotation error motion values. ..15 3.9 Terms for structural error motion ..17 3.10 Terms for axis shift. ..17 4 Preliminary remarks .18 4.1 Measuring units. ..18 4.2 Reference to IS0 230-1 ..18 4.3 Recommended instrumentation and test equipment ..18 4.4 Environment .19 4.5 Rotary component to be tested .19 4.6 Rotary component warm-up. ..19 4.7 Structural error motion tests. ..19 4.7.1 General ..19 4.7.2 Test procedure ..19 4.7.3 Analysis of results .19 5 Error motion test methods for machine tool spindle units .20 5.1 General 20 5.2 Test parameters and specifications. 20 5.3 Spindle axis of rotation tests — Rotating sensitive direction(s) 20 5.3.1 General. 20 5.3.2 Radial errormotion 20 5.3.3 Tilt error motion. .23 5.3.4 Axial error motion .25 5.4 Spindle tests - Fixed sensitive direction .26 5.4.1 General .26 5.4.2 Test setup. 26 5.4.3 Radial error motion. 27 5.4.4 Axial error motion. 29 5.4.5 Tilt error motion. 30 6 Error motion test methods for machine tool rotary tables/heads .31 6.1 General 31 6.2 Axial error motion.. 32 6.2.1 Test setup 32 6.2.2 Test procedure .32 6.2.3 Data analysis. 33 6.3 Radial error motion .. .33 6.3.1 Test setup .33 6.3.2 Test procedure .33 6.3.3 Data analysis for rotating sensitive direction .33 6.3.4 Data analysis for fixed sensitive direction ..34 ii Licensee-Zhejang Institute of Standardization 5956617 ted withoutlicense from IHS Not for Resale, 2015/7/24 03:10:34 IS0 230-7:2015(E) 6.4 Tilt error motion 34 6.4.1 Test setup 34 6.4.2 Test procedure 34 6.4.3 Data analysis for rotating sensitive direction 34 6.4.4 Data analysis for fixed sensitive direction. 35 Annex A (informative) Discussion of general concepts .36 Annex B (informative) Elimination of reference sphere roundness error .55 Annex C (informative) Terms and definitions for compliance properties of axis of rotation .59 Annex D (informative) Terms and definitions for thermally-induced errors associated with rotation of spindle and rotary tables/heads .60 Annex E (informative) Static error motion tests 61 Annex F (informative) Measurement uncertainty estimation for axis of rotation tests .62 Annex G (informative) Alphabetical cross-reference of terms and definitions .67 Annex H (informative) Linear displacement sensor bandwidth and rotational speed .69 Bibliography .72 ganization for Standardization vithout license from IHS IS0 230-7:2015(E) Forewo