On Sun, 18 Jul 2010, Dave Caroline wrote: > Date: Sun, 18 Jul 2010 20:04:02 +0100 > From: Dave Caroline <dave.thearchiv...@gmail.com> > 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] using fanuc drives and motors > > Analog devices also made f to v's > AD650 goes either way and still in production > > http://www.analog.com/en/analog-to-digital-converters/voltage-to-frequency-converters/ad650/products/product.html > > Dave Caroline > >
The AD650 has bipolar output but not quadrature input so would probably not be useful as a bidirectional tachmometer replacement. The L290 interestingly enough is a sine/cosine quadrature input device, probably emulated easily with a DSPIC if needed. On the other hand if the velocity estimation from the encoder counter is good enough, why not drop all the external futzy whatziz and do all the PID loop in EMC... Do the Fanuc drives need a analog velocity signal? That is, is their encoder/velocity feedback not built into the drives themselves? Peter Wallace ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
