Yes this is what I have 2 optical pickups setup n+1/2 The disk has 125 holes and appears to work right and fare as being able to detect directions And when I turn the spindle one rotation the encoder count moves 500 counts
-----Original Message----- From: andy pugh [mailto:bodge...@gmail.com] Sent: Sunday, July 15, 2012 5:09 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Spindle hooked to dc servo amp On 15 July 2012 02:56, Kasey Matejcek <someo...@lkm.bz> wrote: > No home made > With optical pickup The problem with a single-channel encoder is that if you double-count an edge then the apparent velocity appears to suddenly increase massively. Quadrature counting almost entirely eliminates this problem. If you can add a second sensor N + 1/2 pitches away from the first one to provide a quadrature signal then you should see better results. You will also have the ability to sense spindle direction, and that means that rigid tapping becomes more possible (you also need an index for that, but index is fairly easy to add) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ---------------------------------------------------------------------------- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
