KEYENCE's LumiTrax™ Makes Easy Imaging of Challenging Part Features

Ritter and the Vantage team knew from past experience that proper lighting is a necessary component of any vision system, and is key to consistent results. Until now, the best solution in these situations was to flood the area with spotlights, something that complicates the setup while driving up integration costs. The use of supplementary lighting can also compromise speed?in this case, the cycle time for the entire measuring process was less than 16 seconds, so Ritter needed a way to read the barcode quickly and without interruptions. Rather than accept the status quo, he turned to KEYENCE for a solution.

As one of KEYENCE's longtime customers, Ritter already had firsthand knowledge of the company's extensive product line and robust measuring technology. "We've used their vision systems many times on our equipment, and have integrated their laser micrometers and three-dimensional profile cameras as well. We push the use of KEYENCE products with most of our systems, because we know there won't be any phone calls later on from unhappy customers."

At that time, KEYENCE had recently introduced its LumiTrax™ technology, which combines ultra high-speed CMOS sensors, partial illumination LED lighting, and advanced inspection algorithms to deliver an imaging solution that easily detects features, shapes, and text on even the most challenging of part surfaces. Unlike traditional imaging systems, which can be adversely affected by variations in ambient lighting and workpiece orientation, LumiTrax™ uses a high-intensity, multidirectional lighting source to capture up to 16 separate color or monochrome images, and then analyzes the relative brightness level at each pixel to separate irregularities from background surface patterns. The result is a system that quickly and repeatedly "sees" objects that in most cases are otherwise impossible to detect.

Ritter worked with KEYENCE to implement the LumiTrax™ system on the cylinder head line. He says this was a straightforward task, as the CVX controller and interface used on the new system is identical to other KEYENCE products. Ritter wasn't disappointed with the results. The LumiTrax™ made short work of the peened barcode, easily distinguishing the 2D matrix from the cast surface of the part, and doing so in perhaps one-tenth of a second. "The LumiTrax™ system cuts through all the surface noise to give you exactly what you're looking for," he says. "I'm confident in the readings, and there was no need for any trickery with the lighting. Going forward, we're going to use it for all our casting applications, and on any other parts where 2D imaging is a problem. The LumiTrax™ makes it easy."