Hi guys I think you would do better to leverage of the work done by others on bldc drivers. The open-bldc project is very advanced in getting nice control of the motors using an stm32. h
Piotr has already prototype hardware available for a control section (his intent is to create seperate output sections for different motors). He has done all the hard yards of creating toolchains and JTAG programmers built documented etc. He has boards made. Whilst his interest is not cnc he is a big open source fan. Regards Eric On 23/01/2011, at 6:48 AM, Kirk Wallace wrote: > On Sat, 2011-01-22 at 12:36 -0600, Jon Elson wrote: >> Kirk Wallace wrote: >>> On Sat, 2011-01-22 at 22:34 +1100, Erik Christiansen wrote: >>> ... snip >>> >>>> Now an important question. Where is it planned to source the BLDC >>>> motors? :-) >>>> >> Well, Keling has brushless motors for $47 (NEMA 17) and $56 (Nema 23) >> that are >> quite impressive. They have Hall sensors but no encoder, although a >> rear shaft >> is all set up to take US Digital or CUI encoders. >> >> Kirk had a line on some Wantai motors from IMTTUSA that were really sold >> for pump duty and such, and >> it is harder to apply an encoder to these. But, you could now take the >> Hall sensor arrangement >> off the rear shaft and use the new CUI 6-channel encoder to get both >> Hall and quadrature signals. >> >> >> Jon > > Yes. If your primary concern is to just get motors, the above > store-bought motors would be the way to go, but it would be fun to try > making a DIY motor. Also the NEMA 34's are in the $100-200 each range, > and these, to me at least, are much more useful. > > BTW, pictures of my Wantai (IMTTUSA) are here: > http://www.wallacecompany.com/machine_shop/Wantai/ > > This is the smallest of the 34's. > > Taking the DIY idea a little further, wouldn't it be nice to have an > in-country manufacturer? A local source of magnets is a problem for my > country, though. > http://www.scientificamerican.com/article.cfm?id=rare-earths-elemental-needs-of-the-clean-energy-economy > > Short URL: http://alturl.com/knizh > > Another thing I have been mulling over, I wonder if an AEAT-1060 could > be used on a BLDC? > http://www.avagotech.com/docs/AV02-0188EN > > The datasheet indicates: > "There is no upper speed limit; the only restriction is that there will > be fewer samples per revolution as the speed increases." > and > "Maximum Read-out Frequency ≤1 MHz >0 MHz " > > Avago has some six channel encoders that look interesting too: > http://www.avagotech.com/docs/AV02-2387EN > http://www.avagotech.com/docs/AV02-0075EN > > Oops, I need to get back to work. > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > ------------------------------------------------------------------------------ > Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! > Finally, a world-class log management solution at an even better price-free! > Download using promo code Free_Logger_4_Dev2Dev. Offer expires > February 28th, so secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsight-sfd2d > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
