I’ve been successfully using my Lulzbot Mini on Windows 10 since January of 2018. A month ago, my desktop PC died, and I replaced it with a new one. (Still running Windows 10.) While re-installing software, I installed the latest (non-Beta) software from cura-lulzbot_3.6.20_win32.exe. Now, when I start up the user interface, it pauses for a long time (~1-2 minutes) at “Loading interface”, but eventually displays the interface. The printer is connected via a USB 3.0 port with a known good cable. (I.e., it was working before the PC upgrade.) The OS sees the printer connected on COM4 in the Device Manager. But, when I attempt to “Connect” in the interface, the console says it’s connecting via COM4 at 250000 baud. That pauses for a few seconds, then says “Failed to connect” (with no other error message).
I’ve tried uninstalling, cleaning files, and re-installing the software. I’ve tried going back to 3.6.15. I’ve tried using the software that originally came with the printer. I’ve tried three different USB ports. I’ve tried changing the hardware speed on the port, but it only goes up to 128000 baud, and there doesn’t appear to be a way to adjust that on the Lulzbot side in the interface. I’ve made sure that the USB drivers are up-to-date (at least according to MS). Another thread here postulated that the USB connector on the printer and/or the printer’s interface card “went bad”. Due to the timing of this failure, I don’t believe that could be the problem.
So, at the moment, I have a large, expensive paperweight and lots of unused filament. Anyone have a solution for me?