Quote Originally Posted by Doddy View Post
I think you'd find a lot of support to upgrading to Ethernet, rather than USB - there are some people here that have had problems with intermittent issues with USB in a high electrical noise environment. To this end, the admirable UC100 can be replaced instead with the EC300ETH, EC400ETH or AXBB-E devices from CNCDrive - works well with Mach3 and their own UCCNC software. These can plug directly (with suitable cable, of course) into the existing parallel interface that you have on your controller.
This might be preaching to the choir, but I just wanted to echo the Ethernet sentiment.