On Mon, 16 Jan 2012 16:28:58 -0500 gene heskett <ghesk...@wdtv.com> wrote: > On Monday, January 16, 2012 04:07:22 PM Cathrine Hribar did opine: > >> Hi Gene: >> >> Could you give me some idea of what the advantage is of using 2 and 3 >> stack steppers? You seem to know a lot and I hope you don't mind me >> asking dumb questions. >> >> Thanks >> >> Bill >> > > As I see it, its a tradeoff, you can get torque approaching a nema 34 motor > in the nema 23 size form, that because the armature has a smaller OD, can > probably run at faster accelerating rates than the larger nema 34. Weight > hanging on the end of the table looks like it might be less, even with the > so-called triple stack, longer & therefore heavier motors. In my case, > figuring out how to make couplings that are shorter would have allowed me > to put mine closer to the end of the tables, reducing the lever arm of the > weight whose cg is likely a good 6" outward. Moving that inward an inch > and a half would I'm sure make a detectable improvement. > > All this is pure opinion however, and there are folks here on this list > that can stand on much firmer ground when they write on the subject. OTOH, > it also seems to me that the nema 34 motor should be a wee bit more > efficient in terms of amps in vs oz/in out. But I'd expect one can get > arguments started just on that aspect alone. > > An true expert I am not at this, I am a 100% self taught (and poor teacher > at times too) retired tv broadcast engineer with only a GED, CET on the > wall. And a degree UHK (University of Hard Knocks) since I'm only 30 miles > from them & had a few bucks to spare. > > There are some decent tutorials on steppers available on the net, many of > which I think start at a bit too basic a level, but they do fairly well > cover the subject. But I'd also expect that you've done that bit of > homework already. > > Cheers, Gene
Thanks for ur reply.. are u saying that the nema 34 would be equal to a nema 23 three stack? Bill ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
