You don't want to block the hole in the spindle so you are looking for an encoder with a large hole though it? Is that right?
If the spindle is belt or gear driven you could place the sensor on the gear or pulley that drives the spindle. You could also place a timing belt puley on the spindle then drive the encoder with a 1:1 belt drive. 1:1 drive would allow using a 3 channel encoder You could use a 1000 line optical encoder and On Wed, Oct 31, 2018 at 8:32 PM David Berndt <ber...@uberwin.com> wrote: > Thanks Andy, > > That doesn't sound particularly hopeful for me and my plans. I guess > maybe > a more traditional/proven approach of a through-beam sensor with > interrupting disk and much much lower resolution encoder ring with > drilled/milled holes might be the way to go. > > But to make sure this AEDR thing is really dead. Any reason to believe > the > AEDR-831X single channel units, which are the only way the 36tpi units > seem to be available, have the same actual reoslution restriction? If > there is only one channel then are they really looking for a fixed line > width? There would be no offset second sensor at a fixed pitch to require > that. I have the space to mount two single channel units, build in a > little adjustability in their mounting to get them "clocked" correctly to > get a quadrature signal. > > Anyone have any idea what an AEDR-8311 is? The data sheets I can find > only > detail 8xx0, no idea what the last 1 is for. > > Any other options I should be looking at? I didn't see anything super > compelling when I spent 3 hours of my life reading through the datasheets > from the digikey optical sensors - reflective section. I'm working with > a > ~2" ID mounting for my encoder ring, so options for adapting an off the > shelf encoder ring seem low as not many are that large. > > Dave > > > On Wed, 31 Oct 2018 16:48:46 -0400, andy pugh <bodge...@gmail.com> wrote: > > > On Wed, 31 Oct 2018 at 19:00, David Berndt <ber...@uberwin.com> wrote: > > > >> if so was it with one of the one channel output units > >> instead of 2 channels or how did you handle creating such a fine > >> pattern? > >> Any other details about how it was done and how well or not well it > >> works > > > > I used a 2 channel. I ended up having a target laser-cut by a company > > who specialise in PCB stencils. > > > > This might currently be pretty inexpensive from China, for example: > > https://www.seeedstudio.com/stencil.html > > > > It never worked all that well, though. I rather struggled with > > soldering the devices, as at the time I had no hot-air or reflow oven. > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
