On Mon, 31 Mar 2014, Florian Rist wrote: > Date: Mon, 31 Mar 2014 03:23:37 +0200 > From: Florian Rist <fr...@fs.tum.de> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Improvised DC Motor Controll using Mesa 7i39? > > Hi Andy and Peter, > I did it. :-) > > It works. My configuration is still a total mess, but I'll clean up > tomorrow. > > The strange thing is, that the tiny DC motor feels to have more torque > than the much bigger BLDCs. I think there is still something wrong with > my setup. The BLDCs are 75W, 0.28Nm at 4.7A and I easily make them stall > by turning a 20 mm axis with my fingers. Or is this to be expected.
well... .28 NM is not much (thats a 75W at 2500 RPM motor) You should get close to 3X that peak (15A= .84 Nm) note: you have to check current in all three windings to see which one is actually current limiting (when one is at IPeak, two are at -IPeak/2) > > Thanks for all the help. > > Oh and I might need some more. Now that it's done I discovered that I'd > like the new axis to behave like a spindle. I'll investigate that > tomorrow. Should not be too hard to change this I guess. > > See you > Flo > > PS: My configuration is on-line at: http://restweiss.de/loop_2_01.zip > > > > > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
