On Wednesday 13 July 2016 15:57:38 Leonardo Marsaglia wrote: > Hello Jon. > > Well, the encoders that are already installed on one of our machines > are labelled with the Index pulse. The thing is I can't read the pulse > with halscope for example. > I don't think halscope is going to catch it unless you have it running in free roll and are turning the motor/encoder slowly by hand. You can either watch it with a good 200 Mhz digital scope, or some breakout boards have led tally's that I have found to be handier than sliced bread or bottled beer, you just turn the motor very slowly while watching the leds.
> I just tried to use the home using only index pulse and apparently the > index pulse is working because the axis latches until it stops and it > turns always a single turn more or less eyeballing it. > > The strange thing is I that I can't trigger the scope with the index > pulse on LinuxCNC, and also I can't measure the index on my other > encoders. I guess I should try to wire them to a LinuxCNC pc and make > home manually to see if they work ok. > > 2016-07-13 14:29 GMT-03:00 Jon Elson <[email protected]>: > > On 07/13/2016 08:56 AM, Leonardo Marsaglia wrote: > > > Hello to all. > > > > > > We just tested some Heindenhain encoders and as happened with > > > other encoders we can't sense the index pulse. We tried to detect > > > it with a 20 nano seconds period on a digital scope but nothing > > > happens. All the other pulses are working perfect except the index > > > one. > > > > > > I have to mention that this happened with other encoders too, but > > > since > > > > we > > > > > didn't need to use them with index pulse on the other machines we > > > just > > > > let > > > > > it that way and didn't worry about it. > > > > Well, if the scope does not trigger on it, and it triggers > > fine on the A and B, then it just isn't there! > > Now, of course, the index will only happen once per rev, so > > you have to make a full turn to see the pulse. > > Are you SURE these encoders actually have the index pulse? > > > > Jon > > > > > > -------------------------------------------------------------------- > >---------- What NetFlow Analyzer can do for you? Monitors network > > bandwidth and traffic > > patterns at an interface-level. Reveals which users, apps, and > > protocols are > > consuming the most bandwidth. Provides multi-vendor support for > > NetFlow, J-Flow, sFlow and other flows. Make informed decisions > > using capacity planning > > reports.http://sdm.link/zohodev2dev > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
