ISO INTERNATIONAL STANDARD 230-2 Fourth edition 2014-05-01 Test code for machine tools : Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes Code d'essai des machines-outils Partie 2: Détermination de I'exactitude et de la répétabilité de positionnement des axes a commande numérique Reference number ISO 230-2:2014(E) ISO @ IS0 2014 IS0 230-2:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ IS0 2014 - All rights reserved IS0 230-2:2014(E) Contents Page Foreword ..iv Introduction. ..vi 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Test conditions. ..6 4.1 Environment .6 4.2 Machine to be tested .7 4.3 Warm-up. 7 5 Test programme .7 5.1 Mode of operation .1 5.2 Selection of target position. .8 5.3 Measurements ..8 6 Evaluation of the results ..10 6.1 Linear axes up to 2 000 mm and rotary axes up to 360 10 6.2 Linear axes exceeding 2 000 mm and rotary axes exceeding 360° .10 7 Points to be agreed between manufacturer/supplier and user .10 8 Presentation of results ..11 8.1 Method of presentation .11 8.2 Parameters 12 Annex A (informative) Measurement uncertainty estimation for linear positioning measurement - Simplified method 19 Annex B (informative) Step cycle .36 Annex C (informative) Periodic positioning error ..37 Annex D (informative) Linear positioning error measurements using calibrated ball array or step gauge ..40 Bibliography .43 @ IS0 2014 - All rights reserved ii