are you using the ttl -> differential converter/transmitters that you can get for the CUI/AMT encoders? (they are <$10 US) we had issues with ttl encoders above about 15ft. (shielded cable) We have used them on our conversion and they work great (even for non cui/amt encoders)
sam On 01/30/2012 02:56 PM, Viesturs Lācis wrote: > 2012/1/30 Peter C. Wallace<p...@mesanet.com>: >> I am suggesting this test because if there is a noise problem, different >> encoders may not help. > Of course, I totally agree, but I just did not see a reason for noise by now. > >> A possible noise source is the PWM signals. This can >> couple into the encoder if the motor frame ground is not returned to system >> ground > Motor GND comes from transformator + rectifier bridge, so it is > isolated from encoder power supply. > Motor GND is connected to motor frame, so basically - to machine frame. > I have not yet connected machine frame to earth ground, but I am > planning on doing so for safety purposes. > So it means that in that case mains supply and motor supply will not > be isolated any more. > > Does Your suggestion imply doing this kind of connection or should I > connect motor GND and encoder GND? > > Viesturs > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
