This in not unique to your setup but rather a USB problem. The thing to do is to use a isolated USB connection. The problem is mostly due to ground potential differences between devices.
I have a circuit if you are interested. On 2014-12-18 14:26, Les Newell wrote: > Yes, that should work. I run my control panel through a usb->rs232 > converter. I have found the USB side to be a little sensitive to noise. > Very occasionally it will lose connection. At that point I need to > restart LCNC to reconnect which is a PITA. This is probably very > specific to my setup. > > By the way if you get a USB->RS485 converter, try to get one based on a > FTDI chip. FTDI are the most stable and reliable USB->serial converters > I have found. > > Les > > On 18/12/2014 11:53, 77dab wrote: >> Hi all, >> I have on my hand some mitsubishi VFD with 550w winches. >> I would like to try to move them using LinuxCNC. >> the thing is not meant to be Real time, and I've read the modbus module >> lives in User space and it's not RT. >> So, my question: >> Since it isn't RT, can I drive the rs485 thru a USB->rs485 converter, >> using a laptop? >> >> Thanks, Davide. >> > > ------------------------------------------------------------------------------ > 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=164703151&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=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
