In a recent posting I expressed some skepticism regarding a claim of “better than 2 microns repeatability.” Well the integrator, DWFritz, took the time to post a Comment giving a little more explanation. As I suspected, they are relying on subpixel interpolation tools from Cognex, and these helped them demonstrate the required repeatability to their customer.
This is an impressive result. First, the Cognex subpixel algorithm is clearly no slouch when it comes to locating an edge, but more importantly, it speaks to the expertise of the DWFritz team. Getting consistent subpixel results demands a very stable setup. Clearly, they’ve invested in quality components and integrated them in a highly robust manner. So it’s hats off to DWFritz: check out their website next time you need to do high precision gauging.
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