On 17 December 2013 23:32, John Alexander Stewart <ivatt...@gmail.com>wrote:
> Question - if you had to do it again, what would YOU do for a modern > spindle encoder? > I am on the 3rd iteration of spindle encoder on my lathe, so feel well qualified opinionate. iteration 1 was a laser-printed target wrapped round the spindle shaft and viewed by reflective optos. It worked, but not all that well. iteration 2 was a custom made aluminium target and the same reflective optos: https://picasaweb.google.com/lh/photo/_hlZumHKbsbV7YoKPcEmOdMTjNZETYmyPJy0liipFm0?feat=directlink This worked, but had a tendency to drift. iteration 3 is a cheap rotary encoder from eBay driven by 1:1 gearing on the spindle shaft. This works perfectly. But I have gear-making facilities. (Cheap eBay encoder, though not the one I used): http://www.ebay.co.uk/itm/40mm-Outer-Diameter-Incremental-Type-Photoelectric-Encoder-Rotary-Encoder-/281099904847 At that price, if you can find a way to drive it, it isn't worth trying to make anything. I would guess that the lathe has no gears on the spindle to use gear-tooth detectors on? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
