Product category:
Materials testing equipment
News Release from: Renishaw | Subject: Renishaw Revo measuring head and probe system
Edited by the Engineeringtalk Editorial
Team on 10 May 2007
Five-axis measuring head improves
throughput
The Renishaw Revo five-axis measuring head and probe system can improve inspection throughput levels by up to 900% on CMMs previously fitted with three-axis scanning systems.
The Renishaw Revo five-axis measuring head and probe system is being made available commercially to manufacturers worldwide Incorporating Renishaw's Renscan5 technology, Revo has proven to improve inspection throughput levels by up to 900% on CMMs previously fitted with three-axis scanning systems, whilst also saving hours of calibration times compared to conventional indexing head systems
This article was originally published on Engineeringtalk on 9 Mar 2001 at 8.00am (UK)
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The key to the success of the Revo five-axis head is its ability to overcome the limitations of three-axis scanning methods, where any attempt to rapidly move the large mass of a CMM results in inertial errors caused by acceleration and deceleration.
Therefore, the only possible way to maintain acceptable accuracy in three-axis scanning has been at the expense of measuring speed.
However, Revo uses synchronised head and machine motion when scanning, rapidly following changes in part geometry without introducing its own dynamic errors.
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The CMM is able to move at a constant velocity whilst measurements are being taken, without impacting accuracy.
Revo also provides CMM users with infinite head positioning and innovative tip-sensing probe technology, which further improves measurement accuracy by sensing close to the measured surface.
This combination of speed, flexibility and accuracy improves performance in a wide range of scanning measurement applications, including circle, helix, sweep and gasket scanning, plus, if required, rapid single-touch routines.
The system has been used for the measurement of an aero-engine blisk, requiring nine sectional scans of the airfoil profile, eight longitudinal scans on the blade, two scans of the root profile and one scan on the annulus profile.
Originally performed with a three-axis scanning system, the measurement of one blade took 46 minutes, compared to just 4 minutes and 30 seconds with the Revo system, a 922% improvement in throughput.
Almost as dramatic were the results obtained for an automotive cylinder head application which comprised the inspection of twelve valve seats, plus three circular scans on each of the twelve guide bores.
With Revo scanning the valve seats at 400mm/s and 50mm/s on the valve guides, the total measurement time was just 3 minutes and 42 seconds.
This compared to the original time of 29 minutes and 13 seconds for the three-axis system, giving the manufacturer a 690% improvement in throughput. Request a free brochure from Renishaw ...
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