The files I have that I downloaded 19OCT2019 list 1800 lines.? Not to say that someone hasn't modified the code to use a different encoder but the spreadsheet and the document file with photos show 1800 lines.
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Even so, at 100 RPS a 600 line encoder with quadrature encoding is still 240,000 edges per second. Of course on a lathe with backlash on a half nut one could probably get away with only using rising edges.? In one direction A will always be high when B goes high while in the other direction it will be reversed.? The 1/2 period of one pulse with a 600 line encoder probably won't matter.?
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It's not clear from the source code but I'm guessing the RELS tops out at about 1200 spindle RPM which is 20 RPS and then if you look at a 600 line encoder with the 2x quadrature (again according to the source code) equals 24,000 interrupts per second or one about every 42uS.
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If all you do is translates those interrupts into stepping pulses with scale ratio and acceleration you can probably keep up. ?
John, I believe people running RELS are using 600 pulse encoders not 1800.
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Ralph
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On Sat, Dec 14, 2019 at 5:04 PM John Dammeyer <johnd@...> wrote:
> Behalf Of grumpy via Groups.Io > > is this usable > > >
-- Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
