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
