By placing an accurate Hexagon HP-O laser sensor on the Global Advantage CMM, the combined system can achieve accuracies as good as 5 μm in a gage block length measure- ment test, according to the company. The HP-O collects at a rate of 1000 points/second, much higher than a scanning analog probe. Martin noted that GE Aviation was an early development customer, citing data that showed GE measured 55% faster throughput than with traditional touch probe or scanning analog CMMs.
Automation and Visibility “I have seen the use of noncon-
tact metrology increase steadily since 2010,” said Miles Molnar, applications engineer for Capture 3D (Costa Mesa, CA). He said that manufacturers are us- ing fewer gauges, contact probes and CMMs equipped with touch probes in favor of noncontact. “In engine parts, we are talking about turbine blades that have very tight features and need high accuracy,” he said. Capture3D is the North American
reseller of ATOS systems from GOM, one of the pioneers of fringe projection metrology. He attributes its growing use to the increasingly capable accuracy and resolution of noncontact in general and ATOS systems in particular. He said that the most popular device they deliver to aerospace manufacturers is the ATOS triple scan. “That is our highest-end sen- sor, ranging from 5 million to 16 million pixel systems. The 16 million pixel version allows us to scan very small features much faster and quicker,” Molnar said. Why is noncontact now so ca- pable? Molnar said it is a combination of better optical components married to better cameras, lighting, software and cheaper, faster computing. “All of these components have increased ex- ponentially in capability in the last five years,” he said. He points to more ca-
pable software in particular, as a key enabler. For example, the GOM-supplied Inspect Professional software package can help automate data collection and inspection routines, with a package created especially for airfoils. “You can take
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February 2017 |
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