On Thu, 2010-08-19 at 23:31 +0200, dambacher-retrofit.de wrote: > Hi Rick > > Do you have a tachogenerator or an resolver? > > a tachogenerator is like a dynamo giving a sinus voltage/current wich is > proportional to the revolutions. You can use a rectifier circuit and measuere > the effective voltage via a/d > > A resolver is tricky, you need to excite it with a sinus signal of a given > frequency and it gives back two sinus signals the max of the amplitude is > proportional to the angle position (see wikipedia->resolver). You have to > convert the signal at the peak of the excite sinus (using a triggering signal > from the sinus generator circuit), the arctan of the amplitude gives the > angle. > you could use commecial circuits but not at that price I think: > http://www.maccon.de/fileadmin/FTPROOT/2785500.pdf
If you are lucky/unlucky enough to have a resolver then check Jon Elson's page. I think he makes a converter board. Dvae > > bye > Ulf > > > Am 19.08.2010 18:23, schrieb Rick Calder: > > I'd like to hook up a tachometer sensor to my mill. My idea is to have emc2 > > count/process the input stream of pulses and display the rpm on a pyVCP > > dial. > > > > I've tried searching the archives, and cnczone, without finding info on how > > to > > implement this. > > > > Any ideas ? > > > > TIA, > > Rick > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by > > Make an app they can't live without > Enter the BlackBerry Developer Challenge > http://p.sf.net/sfu/RIM-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
