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Printed armature motor for accurate control
dew
equipment
industry. The system is capable of inspecting with up to 32 probes simultaneously and scanning these probes at 100 mm s-l. It can provide coverage at rates approaching those achievable by flux leakage methods. Special data analysis software enables results from different scans to be combined in such a way that individual pits and areas of gradual loss of thickness can be clearly differentiated from plate inclusions. High speed data analysis ensures that easy to interpret defect maps can be available immediately after an area is inspected. The system can therefore provide rapid, reliable inspection of tank floors and produce high quality, quantitative data on which a sound future inspection or repair strategy can be based. Babcock Energy Limited, Technology Centre, High Street, Renfrew PA4 BUW, UK
Flagship analyser
FFT
The CF-6400 is a new high-tech FFT analyser with four channel compatibility from Ono Sokki. Available in the UK from Lucas CEL Instruments, it is the flagship product in their existing range of portable instruments that also includes single and two-channel devices. It has been designed for mechanical vibration analysis and in particular for structural testing where three-axis frequency response is required. The 6400’s advanced features are also applicable to electro-mechanical, electronic and acoustic intensity measurement and analysis where high speed and accuracy are of prime importance. The analyser offers features including four channels of isolated inputs, 90 dB dynamic span and analysis ranges up to 100 kHz, with a 12.5 pHz resolution. Real-time analysis is possible up to 10 kHz (two channels) or 5 kHz (four
174
CF-6400
FTT analyser designed for mechanical vibration analysis and structural testing
channels) and channel-tochannel matching to an accuracy of IfI0.05dB and kO.5”. A full-colour spectrograph provides a three-dimensional spectrum with the X and Y axes representing frequency and time and the Z axis indicating the spectral amplitude in different colours at each point of the X-Y plane. The instrument’s colour display is also used to simplify the set-up procedures which are shown on an auxiliary window. An integral MS-DOS compatible 3.5 inch disc drive allows data to be stored on discs that can be read by most PCs. Industry standard interfaces are also provided for output to plotters and printers. Lucas CEL Instruments Ltd, 35-37 Bury Mead Road, Hitchin, Herts, SG5 1RT, UK
Printed armature motor for accurate control Ultrasonic testing tanks designed and built for the aerospace industry by Wells Krautkramer are now fitted with printed armature
motors to achieve precise positional control of the component being tested. The motors, supplied by Printed Motors, were selected because of their ability to run for many hours at ultra low speeds without cogging or overheating, and because they could be matched to an encoder, supplied by the same company, which makes it possible for the turntable on which components are tested to be positioned with an accuracy of 0.01 O. Accurate positioning of the turntable is important and the earlier method of using a geared hand-wheel to adjust the turntable position manually has been replaced by a precise push button control system. Printed armature motors, by their nature, are more compact than those with other types of armature, and are particularly short end to end, in the axis parallel to the drive spindle. As a result, the need to raise the testing tank in order to fit the motor beneath it is minimized. Printed Motors Ltd, Bordon Trading Estate, Oakhanger Road, Bordon, Hants GU35 9HY, UK
NDT&E
International
June 1991
equipment
industry. The system is capable of inspecting with up to 32 probes simultaneously and scanning these probes at 100 mm s-l. It can provide coverage at rates approaching those achievable by flux leakage methods. Special data analysis software enables results from different scans to be combined in such a way that individual pits and areas of gradual loss of thickness can be clearly differentiated from plate inclusions. High speed data analysis ensures that easy to interpret defect maps can be available immediately after an area is inspected. The system can therefore provide rapid, reliable inspection of tank floors and produce high quality, quantitative data on which a sound future inspection or repair strategy can be based. Babcock Energy Limited, Technology Centre, High Street, Renfrew PA4 BUW, UK
Flagship analyser
FFT
The CF-6400 is a new high-tech FFT analyser with four channel compatibility from Ono Sokki. Available in the UK from Lucas CEL Instruments, it is the flagship product in their existing range of portable instruments that also includes single and two-channel devices. It has been designed for mechanical vibration analysis and in particular for structural testing where three-axis frequency response is required. The 6400’s advanced features are also applicable to electro-mechanical, electronic and acoustic intensity measurement and analysis where high speed and accuracy are of prime importance. The analyser offers features including four channels of isolated inputs, 90 dB dynamic span and analysis ranges up to 100 kHz, with a 12.5 pHz resolution. Real-time analysis is possible up to 10 kHz (two channels) or 5 kHz (four
174
CF-6400
FTT analyser designed for mechanical vibration analysis and structural testing
channels) and channel-tochannel matching to an accuracy of IfI0.05dB and kO.5”. A full-colour spectrograph provides a three-dimensional spectrum with the X and Y axes representing frequency and time and the Z axis indicating the spectral amplitude in different colours at each point of the X-Y plane. The instrument’s colour display is also used to simplify the set-up procedures which are shown on an auxiliary window. An integral MS-DOS compatible 3.5 inch disc drive allows data to be stored on discs that can be read by most PCs. Industry standard interfaces are also provided for output to plotters and printers. Lucas CEL Instruments Ltd, 35-37 Bury Mead Road, Hitchin, Herts, SG5 1RT, UK
Printed armature motor for accurate control Ultrasonic testing tanks designed and built for the aerospace industry by Wells Krautkramer are now fitted with printed armature
motors to achieve precise positional control of the component being tested. The motors, supplied by Printed Motors, were selected because of their ability to run for many hours at ultra low speeds without cogging or overheating, and because they could be matched to an encoder, supplied by the same company, which makes it possible for the turntable on which components are tested to be positioned with an accuracy of 0.01 O. Accurate positioning of the turntable is important and the earlier method of using a geared hand-wheel to adjust the turntable position manually has been replaced by a precise push button control system. Printed armature motors, by their nature, are more compact than those with other types of armature, and are particularly short end to end, in the axis parallel to the drive spindle. As a result, the need to raise the testing tank in order to fit the motor beneath it is minimized. Printed Motors Ltd, Bordon Trading Estate, Oakhanger Road, Bordon, Hants GU35 9HY, UK
NDT&E
International
June 1991