On Wed, Jul 10, 2013, at 06:05 AM, andy pugh wrote: > On 10 July 2013 10:05, propcoder <marius.alks...@gmail.com> wrote: > > Last month I tried running bldc motors (8 poles, 3000rpm max) with > > LinuxCNC and MESA 5i23, 7i43 and 7i39. I am quite happy now, but I see > > the limitations of this set > > John Kasunich made some improments to the bldc component at the fest, > which made a significant improvement to his motor performance (half > the current and twice the speed) by setting the phase angle to half > way between "now" and "next" angles. > I thought the changes had been pushed, but I can't see them in the git log.
They were pushed, visible here: http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=commitdiff;h=1e2ac52bcfe71898fbd4449f370a7f015d7c1c8f I don't know git well enough to know whether they were pushed to master or 2.5 or whatever. As an aside, I really like the idea of doing the encoder to angle to sine-wave calculations in the FPGA. > In the meantime, you could experiment with changing the lead angle > manually (at a fixed speed) to see what happens. Unfortunately the > exact angle (try 90 to 95 degrees) is only right for one particular > speed. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich jmkasun...@fastmail.fm ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
