Mark, The short answer is replacing the limit/home switch wiring with shielded cable and grounding it to one place was the difference in making the sserial errors go away. Unless you need 2.7 back up to 2.6 till you get rid of the sserial errors.
JT On 1/1/2016 4:28 PM, Mark Johnsen wrote: > I have a very similar setup to John Thornton and same noise issue w/ 2.7.3: > Mesa 5i25/7i77 > Transformer 120vac:80Vac, rectified w/ large cap to run 3-axes West Amp > servo's (Not sure John has this) > GS2 Automation direct 3hp drive, powered by separate 240Vac single phase > input. Also, I use his serial modbus setup from the PC. > 120Vac powering the PC (not enclosed in computer case) > > Anyway, I've been reading all the posts here and on the IRC as I've been > away for X-mas Holiday and I think I would like to be able to measure the > noise to be able to determine if my changes make an effect. I've > unsuccessfully dealt w/ noise issues before and find it a daunting task to > trouble shoot. > > I'm assuming using a scope is the right way to do it? > > But I need a scope and would use it for this and some smaller circuit board > type projects (total hack type stuff). I've seen a lot on the rigol, but > I've also come across a siglet that seems to be slightly better. I read > that readings should be 10:1 over the signal and an arduino is around 8Mhz, > so 70Mhz is probably good enough for me. > > Siglent SDS1072CML 7'' TFT-LCD Display Bench-Top Oscilloscope, 70MHz > http://www.amazon.com/Siglent-SDS1072CML-TFT-LCD-Bench-Top-Oscilloscope/dp/B00GQNNHJG > > Wondering if anyone has an opinion on that one? Seems like it would fit > the bill for a low end O-scope? > > Here's the standard Rigol DS-1052E > http://www.amazon.com/Rigol-DS1052E-Digital-Channels-sampling/dp/B003MYND5A > > Thanks, > Mark > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
