Keyence Optical Measuring device

I demoed a 6120 for a while - it's a neat machine that can be very accurate and easy to use. With that said, there are limitations to what a telecentric vision system can do, just like any optical measurement system. What you are trying to measure has a big impact on the performance you'll actually get out of such a system.

The 6120 absolutely shines when it comes to measuring thin, flat stamped parts, such as connector components. When dealing with prismatic or turned parts, you can start to run into issues with surfaces that are parallel to the line of sight. If you set a turned part on a conventional optical comparator with the part center line perpendicular to line of sight, you'll see very sharp, defined edges on the turned diameter, but the flat ends of the part will bloom out into a blur as you move away from the edges. On a telecentric system, such as the Keyence, you won't see a bloom on parallel surfaces but rather only the high points, plus error from any mechanical misalignment of the part/stage to the line of sight. Measuring end-to-end on turned parts is iffy on the Keyence, and measuring side-to-side on tall prismatic parts is very unreliable.

Old post I know, but I figured out a way to correct for the "bloom" on the flat ends. Capture a small line on the edges of the surface where the focus is tight and then construct a line between them. I get very good correlation with physical gages when I do that.

Old post I know, but I figured out a way to correct for the "bloom" on the flat ends. Capture a small line on the edges of the surface where the focus is tight and then construct a line between them. I get very good correlation with physical gages when I do that.