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Laser Tracer for Diameter Measurement

Laser Tracer for Diameter Measurement THE Laser Tracer LT4400 uses a non- contact method to measure edge position and small diameters up to 2mm. With two instruments shaft diameters and Laser Tracer for widths up to 500mm can be handled. Resolutions down to 0.0005mm can be obtained with precision repetition rates Diameter of 500Hz. All control voltages and output signals from the Laser Tracer can be Measurement connected through a single processor board plugged into an IBM compatible microcomputer. A sub miniature D connector using flat ribbon cabling ensures adequate shielding and impe­ dance matching. In use, a collinated infrared light surface finish. for example, a cylindrical diameter of 1 beam illuminates the edge under ex­ A simple interface board for an IBM metre can be measured to an accuracy amination. Imaging of the edge on a compatible microcomputer is available of 0.2mm. Edges up to 5m apart can be 4096 element line sensor is achieved by to link the measurement data through measured with a single device. Alter­ a compact and high resolution optical for immediate display. Eleven different natively, using two Image Tracers system. models cover the ranges from 5mm up independently on the edges of the same to 800mm with a repeatability ranging shaft would considerably improve this Laser for distance/thickness from 0.00125mm to 0.20mm respec­ accuracy. tively. measurement A simple microprocessor board The new Proximeter 600A has been Proximeters can be supplied as in­ IP5000 plugs into an IBM compatible specifically designed to quickly measure dividual components or they can be PC to offer complete control and data the absolute distance to a metallic engineered into complex custom systems analysis. Standard software offered surface. Using two such instruments, the for more specialised applications. provides a selection of various measure­ thickness of a metal sheet can be ment programs including statistics. Soft­ measured. Image tracer measures widths to ware can also automatically monitor vital operating parameters such as dirt The laser source and distance detector 0.02% in optics or aging of the illumination. are both contained in the same measure­ The Image Tracer IT5000 uses a simple ment head. Because the laser does not non-contact imaging method to detect operate in the visible portion of the edge position of components. Different Laser Lines Ltd., Beaumont Close, spectrum, the results generated are not lenses offer different measurement ranges Banbury, Oxon OX167TQ. Tel: 0295 influenced by stray light and varying dependent on the particular application, A P Warren Ltd., Dean Court, Upper Dean, Huntingdon, Cambs, PE18 0NG, England. Tel: +44 234 Digital Readout Systems A single unit for measuring and dis­ settings are infinitely variable and are playing linear or Angular distance not made until after the microdial has which fits directly on the handwheel on been fitted. Any error can therefore be virtually any machine tool has been measured by direct reference to the true launched by A P Warren of Huntingdon, movement of the machine axis. Cambridge, England. Additional features include zero reset, Placing the display and all controls preset mode, inch/mm direct conversion, literally at the operator's fingertips radius/diameter switchable facility, ab­ reduces fatigue and error by making it solute and incremental channels, auto­ absolutely clear which axis is being matic recall of display values if power is displayed. The result is an estimated interrupted and easy on-site conversion 20% increase in productivity. to a micro readout if it is desired to use Reading directly from the leadscrew scales. All functions are controlled with does have its problems. Backlash, caused just six buttons. Displays may be in either red or green. by 'play' in the transmission, is the most serious. However, in less than ten By connecting an external encoder, seconds the Mark II Microdial can be for use on the longitudinal travel of a set to compensate for any amount of centre lathe etc., it is possible to measure backlash, in increments of .01mm/ both axis movements with only one .0005". display—making it a very cost effective dual axis measurement system. Pitch errors are also eliminated. Pitch AIRCRAFT ENGINEERING — October 1990 33 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Laser Tracer for Diameter Measurement

Aircraft Engineering and Aerospace Technology , Volume 62 (10): 1 – Oct 1, 1990

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb037008
Publisher site
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Abstract

THE Laser Tracer LT4400 uses a non- contact method to measure edge position and small diameters up to 2mm. With two instruments shaft diameters and Laser Tracer for widths up to 500mm can be handled. Resolutions down to 0.0005mm can be obtained with precision repetition rates Diameter of 500Hz. All control voltages and output signals from the Laser Tracer can be Measurement connected through a single processor board plugged into an IBM compatible microcomputer. A sub miniature D connector using flat ribbon cabling ensures adequate shielding and impe­ dance matching. In use, a collinated infrared light surface finish. for example, a cylindrical diameter of 1 beam illuminates the edge under ex­ A simple interface board for an IBM metre can be measured to an accuracy amination. Imaging of the edge on a compatible microcomputer is available of 0.2mm. Edges up to 5m apart can be 4096 element line sensor is achieved by to link the measurement data through measured with a single device. Alter­ a compact and high resolution optical for immediate display. Eleven different natively, using two Image Tracers system. models cover the ranges from 5mm up independently on the edges of the same to 800mm with a repeatability ranging shaft would considerably improve this Laser for distance/thickness from 0.00125mm to 0.20mm respec­ accuracy. tively. measurement A simple microprocessor board The new Proximeter 600A has been Proximeters can be supplied as in­ IP5000 plugs into an IBM compatible specifically designed to quickly measure dividual components or they can be PC to offer complete control and data the absolute distance to a metallic engineered into complex custom systems analysis. Standard software offered surface. Using two such instruments, the for more specialised applications. provides a selection of various measure­ thickness of a metal sheet can be ment programs including statistics. Soft­ measured. Image tracer measures widths to ware can also automatically monitor vital operating parameters such as dirt The laser source and distance detector 0.02% in optics or aging of the illumination. are both contained in the same measure­ The Image Tracer IT5000 uses a simple ment head. Because the laser does not non-contact imaging method to detect operate in the visible portion of the edge position of components. Different Laser Lines Ltd., Beaumont Close, spectrum, the results generated are not lenses offer different measurement ranges Banbury, Oxon OX167TQ. Tel: 0295 influenced by stray light and varying dependent on the particular application, A P Warren Ltd., Dean Court, Upper Dean, Huntingdon, Cambs, PE18 0NG, England. Tel: +44 234 Digital Readout Systems A single unit for measuring and dis­ settings are infinitely variable and are playing linear or Angular distance not made until after the microdial has which fits directly on the handwheel on been fitted. Any error can therefore be virtually any machine tool has been measured by direct reference to the true launched by A P Warren of Huntingdon, movement of the machine axis. Cambridge, England. Additional features include zero reset, Placing the display and all controls preset mode, inch/mm direct conversion, literally at the operator's fingertips radius/diameter switchable facility, ab­ reduces fatigue and error by making it solute and incremental channels, auto­ absolutely clear which axis is being matic recall of display values if power is displayed. The result is an estimated interrupted and easy on-site conversion 20% increase in productivity. to a micro readout if it is desired to use Reading directly from the leadscrew scales. All functions are controlled with does have its problems. Backlash, caused just six buttons. Displays may be in either red or green. by 'play' in the transmission, is the most serious. However, in less than ten By connecting an external encoder, seconds the Mark II Microdial can be for use on the longitudinal travel of a set to compensate for any amount of centre lathe etc., it is possible to measure backlash, in increments of .01mm/ both axis movements with only one .0005". display—making it a very cost effective dual axis measurement system. Pitch errors are also eliminated. Pitch AIRCRAFT ENGINEERING — October 1990 33

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Oct 1, 1990

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