2012/1/31 Peter C. Wallace <p...@mesanet.com>: > > The three phase PWM is a fair noise source. Not just capacitively coupled > noise from the three motor wires but inductively coupled noise due to > current spikes from the 28V PWM driving into the motors winding/frame > capacitance. This can be mitigated by putting a common mode choke (Big > ferrite bead) over the three motor leads (DO NOT include the ground lead) > > Please try the encoder sample rate lowering example I provided. This will > quickly help to see if there is a noise problem. Noise piked up by the > encoder wires either inductively or capacitively tends to be short pulses. > By lowering the input bandwidth a lot of this kind of noise can be filtered > out. >
Thank You, Peter and guys! I am really starting to think that I should do some additional testing, before spending any additional funds. Viesturs ------------------------------------------------------------------------------ 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
