On Tue, 16 Nov 2010, Matt Shaver wrote: > Date: Tue, 16 Nov 2010 08:15:02 -0500 > From: Matt Shaver <m...@mattshaver.com> > To: EMC developers <emc-developers@lists.sourceforge.net> > Cc: p...@mesanet.com > Subject: Re: [Emc-developers] 8i20 Support Patch > > On Mon, 15 Nov 2010 17:47:37 -0800 (PST) > "Peter C. Wallace" <p...@mesanet.com> wrote: > >> OK bitfile and assosciated pin file: >> www.mesanet.com/software/parallel/sssvst.zip >> >> Had to drop two encoder counters to fit >> >> 2 sserial channels: >> chan 0: tx1,rx5 >> chan 1: tx3,rx11 >> >> cable (standard cat5 cut in half): >> ch 0 ch 1 >> >> txb1 txb3 orange/white >> txa1 txa3 orange >> >> rxb5 rxb11 green/white >> rxa5 rxa11 green >> >> +5V brown&brown/white >> gnd blue&blue/white > > Thanks! Right now we only have one encoder (spindle). If we ever make a > full servo machine, we'll just go to a card with a bigger FPGA. > > So, hopefully, we'll be able to spin up this motor before Thanksgiving, > but if not, right after. > > Thanks Again, > Matt >
Actually I dont think theres a problem with servos on the 5I20 (its that delux 48 bit step generator thats big). For example, theres a 12 channel analog servo config for the 5I20. Also a 6 channel sserial interface and 6 muxed encoders will fit so a 6 axis digital servo interface is possible in a 5I20 (or 4I65) as well. What wont fit in the Spartan2 FPGAs is the resolver interface (too much block RAM and routing for the 32 bit processor), or combinations with lots of step gens, or where block RAMs are the limit (you are limited to one "smart" interface on the 5I20 due to block RAM limitations) Peter Wallace Mesa Electronics ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today http://p.sf.net/sfu/msIE9-sfdev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
