> > On the scale you are talking about it might be hard to get enough > resolution, and there is a susceptibility to electrical noise. > > I imagine the travel distance is tiny? I would be looking at > (analogue) inductive sensors. Or possibly laser triangulation sensors, > if I could find one cheap on eBay.
Travel distance is a the max cutting depth of a single flute 1/4” engraving tool, which is about 1/2”, plus a bit of headroom. The tool needs to first engrave the material, then contour cut. The material can theoretically be up to 1/2” thick. So a 1000ppr encoder with a reasonably small gear meshing with a linear rack or even a gt2 belt would let me get to within 1 thou, which is plenty precise for this application. An encoder is also easier for me to integrate because I have an unused encoder input on the Mesa board. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
