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Directory details metrology services
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Custom built CMM for heavy engineering A computerized inspection machine capable of accurately measuring structures of 12 m or more in length has been developed by Ferranti Metrology Systems. With its capacity of 12 x 4 x 2 re, the first Jupiter coordinate measuring machine (CMM) has been designed for the inspection of bulky aircraft assembly fixtures, fuselage sections and complete wing sections. In addition to aircraft construction large CMMs are attracting interest from a range of industries involved in heavy engineering, shipbuilding and offshore work. The Jupiter range of CMMs will be custom built to an agreed specification for size and accuracy. The machine consists of three axes: a vertical probe column, a horizontal bridge and longitudinal overhead granite guide rails on floor mounted beams. An alternative configuration with two bridges working independently is also available. A sectional granite worktable can be supplied but for most applications a high
quality concrete floor, combined with the three dimensional alignment capability of the software is adequate. Microprocessor controlled dc servo motors on each axis ensure full three dimensional straight line vector paths, variable speeds and positioning tolerances for optimum machine control. A pendant joystick hand set allows manual control over the machine when required. All Jupiter machines will be equipped with a Micro 900 microprocessor-- a combined counter/ data processing system with alphanumeric displays and eight soft keys. The display consists of command menus which guide the operator through the inspection routine. The Micro 900 also closely controls all machine functions, including self diagnosis, self test, autostop and overspeed detection. Ferranti Metrology Systems, Thornybank, Dalkeith, Midlothian EH22 2NG, UK
Bearing systemsfor linear motion
Directory details metrology services
Linear motion bearings and related components are described in the new linear motion designer's guide from Thomson Industries. Available in the UK from RHP Precision Linear Products, the guide gives details of how to select, specify and apply bearings for smooth, accurate, low-friction linear motion. The Introduction gives brief descriptions of the anti-friction bearings and lists typical applications. Included in the 84 page guide are sections on:
Full details of metrology products and services available from members of the Gauge and Tool Makers Association are given in the 1985 Metrotogy Section Directory. Products to be found in the free 50 page directory, under three languge listings, include the full range of mechanical, pneumatic and electronic equipment. Calibration and other services are also listed. The Gauge and Tool Makers Association, 24 White Hart Street, High Wycombe, Buckinghamshire HP11 2HL, UK
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Ball bushing bearings Ball bushing b e a r i n g s - engineering specifications • Metric ball bushing bearings • The roundway bearing • The roundway bearing - engineering specifications • 60 case hardened and ground shafts • Shaft supports • Shaft s u p p o r t s - - engineering specifications • Reciprocating tables RHP Precision-Linear Products, Bowbridge Road, Newark, Nottinghamshire NG24 4BZ, UK
238
Precision pipework measurement system in operation A development of the Wild RMS 2000 remote measuring system is being put to good use at British Nuclear Fuels Limited at Sellafield UK. Petrochemical plants and other large installations, such as Sellafield, suffer from a common problem - - how to integrate addition pipes into ducts or boiler rooms, say, which are
already a cramped maze of pipework. Fitting new pipework used to be very much a hit-and-miss affair. Measurements were taken as accurately as possible under the difficult circumstances, piping and templates were formed to these measurements and from then on it was a question of trial and error, bending and trimming the pipework until it fitted exactly. All things considered, this was an efficient and time consuming process. What made it even more difficult was the fact that the pipes were often very h o t - - so the job had to be carried out largely at arm's length. Now, by using the Wild system the job can be carried out from even further away but with greatly increased precision (the precision factor of the RMS 2000 is 1 : 100000 depending on the intersection geometry and accuracy of scaling), and with considerable time savings. Using two of the company's T2000 electronic theolodites linked to a GRE3 data recording unit, all the relevant measurements of pipe stubs and data point co-ordinates can be made quickly and accurately. These data are then composed with design data to determine whether any modifications are required. Wild Heerbrugg (UK) Ltd, Revenge Road, Lordswood, Chatham, Kent ME5 8TE, UK
Positioning components A 100 page catalogue from Aerotech describes the high performance precision positioning components and systems by means of photographs, drawings and useful technical data. Over the past fifteen years the company has expanded its product line from the linear/rotary positioning tables and optical mounts into new areas of electro-optics, dc servo motors, amplifiers and digital control. The equipment offered in 'Positioning systems/lasers and accessories' includes HoNe laser tubes from 0.5 to 165 roW; self-contained and remote head laser systems; laser and positioning accessories; OEM laser tubes and ac and dc power systems. Copies are available free from Aerotech Limited, 19a Livingstone Road, Newbury, Berkshire RG14 7PD, UK.
PRECISION
ENGINEERING
Custom built CMM for heavy engineering A computerized inspection machine capable of accurately measuring structures of 12 m or more in length has been developed by Ferranti Metrology Systems. With its capacity of 12 x 4 x 2 re, the first Jupiter coordinate measuring machine (CMM) has been designed for the inspection of bulky aircraft assembly fixtures, fuselage sections and complete wing sections. In addition to aircraft construction large CMMs are attracting interest from a range of industries involved in heavy engineering, shipbuilding and offshore work. The Jupiter range of CMMs will be custom built to an agreed specification for size and accuracy. The machine consists of three axes: a vertical probe column, a horizontal bridge and longitudinal overhead granite guide rails on floor mounted beams. An alternative configuration with two bridges working independently is also available. A sectional granite worktable can be supplied but for most applications a high
quality concrete floor, combined with the three dimensional alignment capability of the software is adequate. Microprocessor controlled dc servo motors on each axis ensure full three dimensional straight line vector paths, variable speeds and positioning tolerances for optimum machine control. A pendant joystick hand set allows manual control over the machine when required. All Jupiter machines will be equipped with a Micro 900 microprocessor-- a combined counter/ data processing system with alphanumeric displays and eight soft keys. The display consists of command menus which guide the operator through the inspection routine. The Micro 900 also closely controls all machine functions, including self diagnosis, self test, autostop and overspeed detection. Ferranti Metrology Systems, Thornybank, Dalkeith, Midlothian EH22 2NG, UK
Bearing systemsfor linear motion
Directory details metrology services
Linear motion bearings and related components are described in the new linear motion designer's guide from Thomson Industries. Available in the UK from RHP Precision Linear Products, the guide gives details of how to select, specify and apply bearings for smooth, accurate, low-friction linear motion. The Introduction gives brief descriptions of the anti-friction bearings and lists typical applications. Included in the 84 page guide are sections on:
Full details of metrology products and services available from members of the Gauge and Tool Makers Association are given in the 1985 Metrotogy Section Directory. Products to be found in the free 50 page directory, under three languge listings, include the full range of mechanical, pneumatic and electronic equipment. Calibration and other services are also listed. The Gauge and Tool Makers Association, 24 White Hart Street, High Wycombe, Buckinghamshire HP11 2HL, UK
• •
Ball bushing bearings Ball bushing b e a r i n g s - engineering specifications • Metric ball bushing bearings • The roundway bearing • The roundway bearing - engineering specifications • 60 case hardened and ground shafts • Shaft supports • Shaft s u p p o r t s - - engineering specifications • Reciprocating tables RHP Precision-Linear Products, Bowbridge Road, Newark, Nottinghamshire NG24 4BZ, UK
238
Precision pipework measurement system in operation A development of the Wild RMS 2000 remote measuring system is being put to good use at British Nuclear Fuels Limited at Sellafield UK. Petrochemical plants and other large installations, such as Sellafield, suffer from a common problem - - how to integrate addition pipes into ducts or boiler rooms, say, which are
already a cramped maze of pipework. Fitting new pipework used to be very much a hit-and-miss affair. Measurements were taken as accurately as possible under the difficult circumstances, piping and templates were formed to these measurements and from then on it was a question of trial and error, bending and trimming the pipework until it fitted exactly. All things considered, this was an efficient and time consuming process. What made it even more difficult was the fact that the pipes were often very h o t - - so the job had to be carried out largely at arm's length. Now, by using the Wild system the job can be carried out from even further away but with greatly increased precision (the precision factor of the RMS 2000 is 1 : 100000 depending on the intersection geometry and accuracy of scaling), and with considerable time savings. Using two of the company's T2000 electronic theolodites linked to a GRE3 data recording unit, all the relevant measurements of pipe stubs and data point co-ordinates can be made quickly and accurately. These data are then composed with design data to determine whether any modifications are required. Wild Heerbrugg (UK) Ltd, Revenge Road, Lordswood, Chatham, Kent ME5 8TE, UK
Positioning components A 100 page catalogue from Aerotech describes the high performance precision positioning components and systems by means of photographs, drawings and useful technical data. Over the past fifteen years the company has expanded its product line from the linear/rotary positioning tables and optical mounts into new areas of electro-optics, dc servo motors, amplifiers and digital control. The equipment offered in 'Positioning systems/lasers and accessories' includes HoNe laser tubes from 0.5 to 165 roW; self-contained and remote head laser systems; laser and positioning accessories; OEM laser tubes and ac and dc power systems. Copies are available free from Aerotech Limited, 19a Livingstone Road, Newbury, Berkshire RG14 7PD, UK.
PRECISION
ENGINEERING