On Fri, 29 Oct 2010, Stuart Stevenson wrote: > Date: Fri, 29 Oct 2010 12:37:44 -0500 > From: Stuart Stevenson <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] scale/encoder > > On Fri, Oct 29, 2010 at 12:13 PM, Andy Pugh <[email protected]>wrote: > >> On 29 October 2010 17:58, Stuart Stevenson <[email protected]> wrote: >> >>> Is there a chip or reasonable board I can use to change the sine waves >> to >>> pulse or quadrature? >> >> I suspect that the Pico Resolver converter might work, which I think >> is based on something like this >> >> http://docs-europe.origin.electrocomponents.com/webdocs/0e38/0900766b80e382db.pdf >> >> I have some of the Pico resolver converter boards. > Jon E. - do you think they will work? > > > >> I think Mesa have a resolver converter too (or one on the cards). >> >> I have a 5i23 - will it do this?
The 5I23 can work with the resolver interface card (7I49) but this would need firmware modifications for DC exitation like your scale uses (sine and cosine signals with no carrier) But as Chris says if interpolation is not needed, a simple comparator would do to convert the signals to TTL quadrature. Can you slowly move .010 or so and count the peaks? if the resolution or your display is more than 4X the number of peaks from one signal then interpolation is needed. > > You can probably do 3 axes with a single Arduino, too, have a look at: >> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ResolverToQuadratureConverter >> > > thanks > Stuart > > > -- > dos centavos > ------------------------------------------------------------------------------ > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > 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. ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
