On Mon, 2007-02-05 at 14:24 +0100, Javier Ros Ganuza wrote: > On Mon, 2007-02-05 at 07:53 -0500, Jim Register wrote: > > On Mon, 2007-02-05 at 11:11 +0100, Javier Ros Ganuza wrote: > > > Returning to my previous thread about HOMING. I did read the information > > > pointed out here (section 5.4 of the manual), and there is some thing I > > > can understand: > > > > > > What is index pulse?. > > > > > > I have brushless servos with quadrature encoders. Is the index pulse > > > signal the one from the quadrature encoder, or is it a different signal > > > (the one coming for hal sensors, something entirely different, or > > > something that can be arbitrarily assigned within EMC, or..)???. > > > > Javier, > > > > The index pulse would come from the simulated encoder on the 631 servo > > drive, on the X40 pins labeled "Z" and "/Z". > > > > In our case, the Z or /Z are not simulated (I think :) ), the brushless > have a quadrature encoder, and we are driving all to the motenc-100 > terminal board.
According to the 631 docs, your motor actually has a resolver instead of an encoder; the 631 driver simulates the encoder signals. That's just a minor detail at the moment, but it may be important when you are troubleshooting. It sounds like a very nice arrangement. > http://imac/parallel/images/argazkiak/DSCN1697.JPG shows the conection > of the RJ45 standard ethernet cable to the board (left-up) Oh, the X40 connector does not have the pairs on the same pins as an RJ45 Ethernet connection. If you used a stock Ethernet cable, GND and /Z will be on one pair, Z and /A on another, and A and 5VI on a third. Only B and /B will be on a pair. You need to wire the RJ45 end so that each signal has its own pair, or the twisted pairs in the cable will actually work against you. > And in http://imac/parallel/images/argazkiak/DSCN1691.JPG you can see > the Oposite end of the same RJ45 cable, conected to the X40 input. Unfortunately, those links take me to the Apple(tm) website, but I did find the images on your website. (The cabinet looks nice, by the way.) > We have configured the 631 servo to output quadrature signals from X40. > > > > So if I got the idea: > > We can use index pulse, and the index pulse is taken from the Z > and/or /Z signals that is being fed to the card. So activating index > pulse in the HOMING configuration will work (in fact it works but we > didn't known if index pulse was actually being used) using index > pulse.??? Yes, the Motenc driver supports the index pulse in EMC2.1 > So in general (just for curiosity), index pulse is always taken from Z > and/or /Z signal from quadrature encoder??? Correct. > > Many thanks > > Javier Ros You are welcome. Jim ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
