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Keyence Optical Measuring device

RadconRanger
We have one of these. An IM-6120 I think. I really like the convenience and simplicity of making measurement programs on the device.
My question is this, if anyone can help me:
The manual claims accuracy down to 1 micron in wide field and 1/2 micron in high-def.
Is this, well, accurate?
The intra webs have few resources where I can actually go and see what real-world accuracy is. The company website is not a credible source for anything other than a sales pitch (IMO).
Thanks!
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  • I have found that very small radii, usually under 0.010-0.015", it can be a bit unstable.

    That's definitely another area that can be problematic, depending on the application. Vision systems with digital cameras use sub-pixel algorithms to produce measurement resolutions that are easily ten-fold the native resolution of the camera, but they become increasingly unstable/inaccurate on features that approach the size of the native resolution.

    We have a few telecentric vision systems that work on the same principal as the Keyence, just with a horizontal line-of-sight that is ideal for turned parts. The largest of them has a resolution scale of about .0024" per pixel, but it can easily measure turned diameters to within .0002" of conventional tools. However, it struggles with, say, a .010" corner radius in a groove since it is trying to extract the feature from a 4x4 block of pixels.
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  • I have found that very small radii, usually under 0.010-0.015", it can be a bit unstable.

    That's definitely another area that can be problematic, depending on the application. Vision systems with digital cameras use sub-pixel algorithms to produce measurement resolutions that are easily ten-fold the native resolution of the camera, but they become increasingly unstable/inaccurate on features that approach the size of the native resolution.

    We have a few telecentric vision systems that work on the same principal as the Keyence, just with a horizontal line-of-sight that is ideal for turned parts. The largest of them has a resolution scale of about .0024" per pixel, but it can easily measure turned diameters to within .0002" of conventional tools. However, it struggles with, say, a .010" corner radius in a groove since it is trying to extract the feature from a 4x4 block of pixels.
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