I have bought a Renishaw touch-probe. It has an inductive interface to connect to the controller, described in patent GB2025073 It appears that an LC circuit in the probe is shorted out by the probe contacts when there is no contact. All fairly simple, though finding what the resonant frequency is is probably important.
I am trying to think what might be a suitable device for the "receiver". I guess I could wind a couple of sets of windings round a ferrite, but there is probably something off-the-shelf that will work. I am even pondering the idea of sensing it with a spare Resolver output from my Mesa 7i49 card. I suspect that if I had three windings on the ferrite, with one further away from the probe than the other then I would see a shift in apparent resolver angle, and could use that as my probe input. Maybe air-core would work better? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
