Last week I got finally my SM A350 printer. The first testprint via wifi worked quit well. After that I tried to establish the usb-connection. It failed completely. After installing the CH340 driver, there is even no beep when I pug in the usb-connector. The device is simply not detected (window 10, device manager). I tried this on two different computers and tow different usb-cables. I even tried with a raspberry-octoprint. Usb-sticks are working flawlessly.
