On 10 May 2018 at 21:09, Andrew <pkm...@gmail.com> wrote: >> The interface is a 5-ring connector like a jack plug. >> I haven't managed to figure out which ring is which, and Zeiss are not >> saying.
> So it must be two NC contacts and the rest for the piezo. Yes, I figured that much out, the question was which is which. I damaged one trying to get it apart, so decided to simply part-off the top on the lathe. (They really are not designed for disassembly). It turns out that the NC contacts are part of a resistor network. There is a 90k across the contacts and a 470k in series. That was why my beep-test didn't work (I had not realised that putting my multimeter in beep mode also locks it in single-ohms mode, so the display was showing nothing.) So, working purely as a touch-probe they show 76kΩ when un-triggered and 90kΩ when triggered. So I need to find a way to convert that to a digital input for LinuxCNC. (I may well just ignore the piezo element) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
