Geert De Pecker wrote: > Jon, > > After going through some doc about emc, I understood the encoder should > work with one signal (A and Z). I'll give that a try. It should be A and B for just reading position, Z is the index (zero). > > I did some tests with the ir leds and fototransistors of a canibalized > mouse and I guess this will work. I'll add an 7414 schmitt trigger to > avoid noise. > > What I couldn't find in the doc was which polarity the signal must have. > Although not important for A or B, maybe for the index pulse it is of > importance. > Polarity of A an B doesn't matter, you can change the polarity of the scale parameter to get the direction right, or switch the A and B wires. > Also, do you know if there are special constraints about the Z pulse? > Must it be high (or low) before the A becomes high or doesn't this play > any role? > Traditionally, Z should be low except during the short interval of the Z. With my USC/UPC board and the PPMC board set, it is triggered on the rising edge of Z, I don't know about the software encoder interface. With EMC, at least, there is no qualification between the Z and A or B. > Thanks for the info. > > Below a link to the technical drawing for mounting this on a sherline > spindle: > > http://users.skynet.be/gedp/FILES/encoder.JPG > http://users.skynet.be/gedp/FILES/encrend01.png Nice drawings, this is Rhino? Looks a lot better than my Bobcad drawings.
Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
