On Mon, 2007-02-05 at 12:28 -0500, Jim Register wrote: > 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. > Sorry if it sounds too trivial, but I'm lost, what is the diferencie between encoder and resolver. Well, I know what is a encoder, but I was thinking that a resolver was in fact a encoder. So what is a resolver (a potentiometer?)?
> > http://imac/parallel/images/argazkiak/DSCN1697.JPG shows the conection > > of the RJ45 standard ethernet cable to the board (left-up) > Sorry for the mistake, the server was in my internal network. The fully qualified name is: http://www.imac.unavarra.es/parallel/images/argazkiak/DSCN1697.JPG > 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. We've linked the individual cables following the diferent colors of the cables that can be seen thought the plastic connector and the conection diagram provided for x40 in the 631 manual, the RJ45 cable has been open in the opposite end, and corresponding connections has been made following motenc-100 terminal board specifications. EMC wonderfully drives the assembly so I think we've made proper connections in this side. > > > 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. > should be http://www.imac.unavarra.es/parallel/images/argazkiak/DSCN1691.JPG > 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. > It has been very clarifying for me. So, it can be said that: "index pulse" is a concept internally defined by EMC and depending on hardware the driver can implement this index pulse in different ways. It happens that with the motenc-100 driver, or with other divers using quadrature encoders, the index pulse is defined using available Z and/or /Z quadrature signals. Do you agree? Thanks a lot Javier > > > > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
