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Profile measuring instrument
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Conference report 20 March 1984, Lindfield, NSW, Australia
Trends in Dimensional Measurement Strong evidence of wide interest in new developments in precise dimensional measurement was provided by the attendance of about 250 at this symposium at the National Measuremerit Laboratory of the CSIRO Division of Applied Physics, Lindfield, NSW. They included over 100 engineers and scientists from industry, together with representatives of Commonwealth and State Departmerits and instrumentalities, universities and colleges, industry research associations, the Standards Association of Australia and the National Association of Testing Authorities. Opening the Symposium, Dr W.R. Blevin, Chief Standards Scientist of CSIRO, referred to recent developments in measurement technology, especially through the application of digital electronics, laser systems and computer techniques. He emphasized the need for understanding of the new technology, pointing out that, although much of the associated equipment is likely to be imported, Australian users should be ready to adapt it for specific uses and possibly to add to the development of the technology, The essential features of the Australian measurement system were described by representatives of the Division of Applied Physics7 and the National Association of Testing Authorities s. The importance of ensuring that Australian measurements are compatible with those made in other advanced countries was emphasized, especially in view of the possibilities of manufacturing under 'offset' arrangements. The maintenance of standards of the highest accuracy in the Division of Applied Physics and the dissemination of standards through NATA laboratories provide adequately for traceability of measurements in Australian industry, In other sessions, three-dimensional interactive coordinate measuring machines, roundness and surface finish measurement, and laser techniques in dimensional measurement were discussed by speakers from industry, the Department of Defence Support and the Division of Applied Physics. After an
140
introductory paper ~reviewing the development of the concept of threedimensional coordinate measurement and recent progress in the design of equipment, users of some advanced machines discussed their experience with them 2'3. Significant improvements in productivity were reported, in one case by a factor of forty. Accurate measurement of roundness is important in view of the serious problems that can be caused by relatively small departures from roundness specifications. Symposium members were told that, in favourable circumstances, roundness can be measured to within about 0.1 micrometre, Although equipment for achieving accuracy of this order is very costly, less expensive methods and instruments are available at various levels of accuracy appropriate for particular applications 4. Again, user experience indicating the value of the installation of high-precision equipment was reported, s Surface roughness measurement is relevant to a wide range of engineering applications, both those where the aim is to minimize roughness and those in which a specified kind of roughness is needed. Cornmercially available roughness measuring equipment was discussed 6 and some recent work on threedimensional profile measurement in the Division of Applied Physics was described, Speakers from the Division of Applied Physics and the Department of Defence Support discussed the use of lasers and laser interferometers in dimensional metrology 9 and in the assessment of machinetool performance ~°. Such systems can be used not only for length mensurernent but also for the measurement of angle, flatness, straightness, parallelism and squareness. Holography and speckle interferometry can also be used in the measurement of small displacements, and their applications include vibration measurement and non-destructive testing, The symposium was arranged by a small organizing committee within the Division of Applied
Physics. Its success shows a healthy awareness in industry and government bodies of the importance of precise dimensional metrology and emphasizes the need for continuing collaboration between the Division of Applied Physics and those concerned with high-precision production engineering. A set of the papers presented at the symposium will be available from the Division shortly at nominal cost*. E.G. Thwaite CSIRO, Australia * Inquiries should be addressed to: Miss SoHuddleston, CSIRO, Division of Applied Physics, PO Box218, Lindfield, NSW2070, Australia
Paperspresented 1 Sona C,M. Three-dimensional inter-
active coordinate measuring machines 2 McBain R. Impact of Zeiss UMM 500, cnc 4-axis-coordinate measuring machine on dimensional metrology 3 NeeveB. Experiencewith an LK 80 computerized numerical control measuring machine 4 PurssM.E. Roundnessand techniques used to assess roundness 5 Pooley R.A. The introduction of a computerized roundness and straightness measuring system at Hawker de Havilland 6 Thwaite E.G. Surface finish -measurement and control in manufacture 7 Ciddor P.E.and Sire P.J. Dissemination of dimensional quantities: the role of CSIRO 8 Stanton K.N. NATA-- its role in dimensional metrology 9 Stock H.M.P. Lasertechniques applied to dimensional metrology 10 SkeenL.L. The application of laser measuring systems to machine tool performance assessment
Profile measuring instrument "Precision in profile measurement', is the sub-title of a brochure from Rank Taylor Hobson Limited on the Talycontor. Fully illustrated, the brochure describes Talycontor's capabilities in checking and recording of workpiece profile and features a range of accessories which increase the instrument's versatility. Copies are available free of charge from Rank Taylor Hobson Limited, PO Box 36, New Star Road, Thurmaston Lane, Leicester LE4 7JQ, UK.
J U L Y 1 9 8 4 V O L 6 NO 3
Conference report 20 March 1984, Lindfield, NSW, Australia
Trends in Dimensional Measurement Strong evidence of wide interest in new developments in precise dimensional measurement was provided by the attendance of about 250 at this symposium at the National Measuremerit Laboratory of the CSIRO Division of Applied Physics, Lindfield, NSW. They included over 100 engineers and scientists from industry, together with representatives of Commonwealth and State Departmerits and instrumentalities, universities and colleges, industry research associations, the Standards Association of Australia and the National Association of Testing Authorities. Opening the Symposium, Dr W.R. Blevin, Chief Standards Scientist of CSIRO, referred to recent developments in measurement technology, especially through the application of digital electronics, laser systems and computer techniques. He emphasized the need for understanding of the new technology, pointing out that, although much of the associated equipment is likely to be imported, Australian users should be ready to adapt it for specific uses and possibly to add to the development of the technology, The essential features of the Australian measurement system were described by representatives of the Division of Applied Physics7 and the National Association of Testing Authorities s. The importance of ensuring that Australian measurements are compatible with those made in other advanced countries was emphasized, especially in view of the possibilities of manufacturing under 'offset' arrangements. The maintenance of standards of the highest accuracy in the Division of Applied Physics and the dissemination of standards through NATA laboratories provide adequately for traceability of measurements in Australian industry, In other sessions, three-dimensional interactive coordinate measuring machines, roundness and surface finish measurement, and laser techniques in dimensional measurement were discussed by speakers from industry, the Department of Defence Support and the Division of Applied Physics. After an
140
introductory paper ~reviewing the development of the concept of threedimensional coordinate measurement and recent progress in the design of equipment, users of some advanced machines discussed their experience with them 2'3. Significant improvements in productivity were reported, in one case by a factor of forty. Accurate measurement of roundness is important in view of the serious problems that can be caused by relatively small departures from roundness specifications. Symposium members were told that, in favourable circumstances, roundness can be measured to within about 0.1 micrometre, Although equipment for achieving accuracy of this order is very costly, less expensive methods and instruments are available at various levels of accuracy appropriate for particular applications 4. Again, user experience indicating the value of the installation of high-precision equipment was reported, s Surface roughness measurement is relevant to a wide range of engineering applications, both those where the aim is to minimize roughness and those in which a specified kind of roughness is needed. Cornmercially available roughness measuring equipment was discussed 6 and some recent work on threedimensional profile measurement in the Division of Applied Physics was described, Speakers from the Division of Applied Physics and the Department of Defence Support discussed the use of lasers and laser interferometers in dimensional metrology 9 and in the assessment of machinetool performance ~°. Such systems can be used not only for length mensurernent but also for the measurement of angle, flatness, straightness, parallelism and squareness. Holography and speckle interferometry can also be used in the measurement of small displacements, and their applications include vibration measurement and non-destructive testing, The symposium was arranged by a small organizing committee within the Division of Applied
Physics. Its success shows a healthy awareness in industry and government bodies of the importance of precise dimensional metrology and emphasizes the need for continuing collaboration between the Division of Applied Physics and those concerned with high-precision production engineering. A set of the papers presented at the symposium will be available from the Division shortly at nominal cost*. E.G. Thwaite CSIRO, Australia * Inquiries should be addressed to: Miss SoHuddleston, CSIRO, Division of Applied Physics, PO Box218, Lindfield, NSW2070, Australia
Paperspresented 1 Sona C,M. Three-dimensional inter-
active coordinate measuring machines 2 McBain R. Impact of Zeiss UMM 500, cnc 4-axis-coordinate measuring machine on dimensional metrology 3 NeeveB. Experiencewith an LK 80 computerized numerical control measuring machine 4 PurssM.E. Roundnessand techniques used to assess roundness 5 Pooley R.A. The introduction of a computerized roundness and straightness measuring system at Hawker de Havilland 6 Thwaite E.G. Surface finish -measurement and control in manufacture 7 Ciddor P.E.and Sire P.J. Dissemination of dimensional quantities: the role of CSIRO 8 Stanton K.N. NATA-- its role in dimensional metrology 9 Stock H.M.P. Lasertechniques applied to dimensional metrology 10 SkeenL.L. The application of laser measuring systems to machine tool performance assessment
Profile measuring instrument "Precision in profile measurement', is the sub-title of a brochure from Rank Taylor Hobson Limited on the Talycontor. Fully illustrated, the brochure describes Talycontor's capabilities in checking and recording of workpiece profile and features a range of accessories which increase the instrument's versatility. Copies are available free of charge from Rank Taylor Hobson Limited, PO Box 36, New Star Road, Thurmaston Lane, Leicester LE4 7JQ, UK.
J U L Y 1 9 8 4 V O L 6 NO 3