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 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
