I have tried with USB isolator made with Icoupler devices from analog devices on other products without luck. I am using ethernet which I think have a isolation transformer. I do not think there are any tolerances for missed packets right now. For serial communication I have tried opto couplers without with some improvement. I have also tried isolation devices from I think Texas instruments made from differential drive over two capacitors and they are great but I do not think I could use them for 100Mbit ethernet.
I will increase tolerance for missed packets to be able to measure percentage of lost packets, it is not perfect but better than nothing. I will also add a common mode inductor and maybe a shielded cable. I have encountered the problem on several products so it is not isolated to just this one I built myself. Nicklas Karlsson On Wed, 26 Nov 2014 19:28:25 +0200 Marius Liebenberg <mar...@mastercut.co.za> wrote: > I have had many problems with USB communications with motors and plasma. > You can overcome these by putting an electrically isolated barrier in > the usb line. There are some chips from Linear (LTM2448) that will do > just that. The equipment on either end cannot be connected to the same > ground or supply if you go this route. > > On 2014-11-26 19:07, Karlsson & Wang wrote: > > PWM is great for efficient motor but unfortunately it is also very good at > > disturbing digital communication. Do anybody had any problems with the > > communication errors then motor start? > > > > Nicklas Karlsson > > > > ------------------------------------------------------------------------------ > > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > > with Interactivity, Sharing, Native Excel Exports, App Integration & more > > Get technology previously reserved for billion-dollar corporations, FREE > > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -- > > Regards /Groete > > Marius D. Liebenberg > +27 82 698 3251 > +27 12 743 6064 > QQ 1767394877 > > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
