On Wednesday 11 January 2017 12:18:54 Nicklas Karlsson wrote: > Yes it is way to slow, hardware counters are cheap and work well, do > you have them in you PI board? > This is my first pi project,its a raspi 3b, and I am learning as I go while I bring this machine to life.
ATM its sitting there, with the back gear engaged, belts in lowest gear, turning at about 1/2 an rps as the vfd is sitting at about 20.5 HZ. More to put time on a minmax looking for some huge bursts of speed from .5 rps, to 25k revs either way. I hope I have that fixed, and that all I have to do with the x/z steppers when I finally bring those up, is more of the same that seems to have been the magic twinky to shut the vfd up. First time I've ever had to deal with an spi bus thats running at 32Megabaud when the noise from the switching psu, or the driver itself is at 32megabaud, and the noise bouncing around is at 50 to 150 megahertz. 3 volt p-p buss, noise is faster than the buss and 6 volts or more p-p... It certainly enforces the idea of a single point ground, with BIG, Wide conductors. So far , thats working. > On Tue, 10 Jan 2017 22:02:28 -0600 > > Jon Elson <el...@pico-systems.com> wrote: > > On 01/10/2017 08:39 PM, Gene Heskett wrote: > > > But if I hook up the halscope, the apparent quadrature error is > > > worthless due to the 1KHz servo-loop timing limiting the > > > bandwidth. > > > > Well, that's why we use hardware encoder counters, as > > sampling the quadrature at 1 KHz just isn't fast enough. > > > > Jon > > > > -------------------------------------------------------------------- > >---------- Developer Access Program for Intel Xeon Phi Processors > > Access to Intel Xeon Phi processor-based developer platforms. > > With one year of Intel Parallel Studio XE. > > Training and support from Colfax. > > Order your platform today. http://sdm.link/xeonphi > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ---------------------------------------------------------------------- >-------- Developer Access Program for Intel Xeon Phi Processors > Access to Intel Xeon Phi processor-based developer platforms. > With one year of Intel Parallel Studio XE. > Training and support from Colfax. > Order your platform today. http://sdm.link/xeonphi > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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> ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
