On Friday 01 December 2017 01:20:19 Frederic RIBLE wrote: > On 2017-11-30 15:13, Gene Heskett wrote: > > generator. So I am going to make up a board to carry a 74ls86 > > today, > > I am using an old 75ALS195N to convert the symmetrical encoder output > to single TTL signal. > It is working well with my spindle running at 3000rpm. > I have a RVP510 encoder configured for 1024ppr. > I've half a stick of 74ls86's, which should be able to handle the 90 kilohertz I measured yesterday when it was running wide open. I just need to clear off a work spot and make it. Thats 90 rps or 5400 rpm.
But that brings up a question for Peter: Is encoder.rawcounts the count of one channel, or combined into quadrature edges? Because the scale factors I came up with, based on 100 revs at the spindle, may be wrong by a factor of 4. if rawcounts is already quadrature edges. The manpage only very indirectly refers to the counter mode. The hal code to measure that is still there, so I'll rig a motor supply and recalculate that. Thanks Frederic. > Frederic > http://cnc.f1oat.org Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
