That's exciting because it does away with the need for a set of large diameter toothed pulleys turning a quadrature encoder. One of the things that kept me away with my larger bore South Bend Lathe.
There is no reason a second sensor couldn't be added to provide quadrature? As long as the two sensors were close enough together so that they both knew the missing tooth was there. Then the missing tooth just looks like a slowly moving gear for that one period. No unexpected edges during that period. You'd probably have to dictate one of them as the index determining pulse. Nicely done though. Is the code available for a look see? John > -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: July-20-21 3:00 PM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] A new lathe encoder option. > > I have added missing-tooth index to the software encoder (only in master). > > https://youtu.be/t48TnJQtbCw > > This opens up a number of large-bore encoder options, as this is the > scheme used on crankshaft trigger wheels. > > options: > https://www.ebay.co.uk/itm/123201654888 (expensive, but a good format) > https://www.ebay.co.uk/itm/334076379341 (cheaper, but needs modification) > https://www.ebay.co.uk/itm/313025151085 (poly-vee pulley included) > > I haven't tested it on a lathe yet, or even driving a stepper to see > if the missing teeth cause a stutter. > > Any volunteers? My own lathe uses a resolver on the spindle. > > -- > 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, 1912 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
