TECHNICAL ISO/TR REPORT 16907 First edition 2015-04-01 Machine tools Numerical compensation of geometric errors Machines-outils - Compensation numérique des erreurs géométriques Reference number IS0/TR 16907:2015(E) ISO International Organization for Standardization Zhejang Institute of Standardization 5956617 @ IS0 2015 vided by IHS under ted without license from IHS IS0/TR 16907:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland Prganizationfor Standardization Not for Resale, 2015/6/2 07:11:24 etworking permitted without license from IHS IS0/TR 16907:2015(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope.. 2 Normative references 3 Terms and definitions 4 Potential benefits and limits of numerical compensation ..4 5 Kinematic representation of machine tool structure ..5 5.1 Machine tool configuration and designation .5 5.2 Kinematic representation of the machine tool 6 Geometric errors of the machine tool ..6 6.1 Sources of geometric errors .6 6.2 Geometric errors of axes of linear motion 6.3 Geometricerrorsofaxesofrotation .7 6.4 Position and orientation errors between axes of motion 6.5 Other relationship between axis of motion and axis average lines ..10 Determination of geometric errors ..10 7.1 General .10 7.2 Consideration on determination of geometric errors .11 7.3 Selection of the machine tool coordinate system. ..11 7.4 Superposition of individual errors ..11 7.4.1 Rigid body behaviour. ..11 7.4.2 Non-rigid body behaviour. .12 7.5 Direct measurement of geometric errors .14 7.6 Indirect measurement of geometric errors ..15 8 Compensation of geometric errors .15 8.1 General .15 8.2 Types of geometrical compensation ..15 8.2.1 General. .15 8.2.2 Compensation for positioning errors of linear axes along specific lines, L-Pos...15 8.2.3 Compensation for straightness errors of linear axes along specific lines, L-STR..16 8.2.4 Compensation for squareness error between axes of linear motion at specific lines,L-SQU .16 8.2.5 Compensation for the angular error motions of linear axes on 3-D position of functional point in the working volume, L-ANG ..16 8.2.6 Physical compensation for errors in functional orientation, FOR. .16 8.2.7 Volumetric compensation of linear axes, L-VOL ..17 8.2.8 Volumetric compensation of linear axes including functional orientation, L-VOL+ ..17 8.2.9 Compensation for positioning errors of rotary axes, R-Pos ..17 8.2.10 Compensation for radial and axial error motion of rotary axes, R-RAX 8.2.11 Compensation for position and orientation errors of rotary axes, R-PoR .. 17 8.2.12 Compensation for the tilt error motions of rotary axes on 3-D position of functional point in the working volume, R-ANG. .18 8.2.13 Volumetric compensation for rotary axis errors, R-VOL 18 8.2.14 Volumetric compensation for rotary axis errors including functional orientation, iii ee=Zhejang Institute of Standardization 5956617 vithout license from IHS Not for Resale, 2015/6/2 07:11:24