MauroS

I have had a similar problem for months. ASI6200 camera, filter wheel, guide camera, focuser, and Avalon m-one mount. The mount connected directly to the PC, all others go to a HUB on the telescope and from there to another port on the PC. Occasionally some devices would disconnect and reconnect. After some testing I found that by connecting the mount with bluethoot instead of USB the problem disappeared. But I did not want to use bluethoot; it is slow to initialize. I tried connecting the mount to another port, then connecting all or some devices via a powered USB hub. Then I bought this device https://www.amazon.it/gp/product/B07THZFDGH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 to check the power draw. Everything was normal. The mount never disconnected, but if it was connected it was the others that were malfunctioning. One day I changed the mount's USB cable, which is 2 meters long Amazon brand, to a 50cm one. The problems disappeared. I got another 2-meter cable of higher quality, but the problem still occurred. Then I inserted a passive USB hub only between the computer and the mount's 2-meter cable and now everything works. I work in IT, but I couldn't figure out what it could be. I think there is some signal just beyond the specification limits that causes a reset of the computer's USB chip. Of course, I have also tried changing computers. I hope this information gives you some useful ideas. Connect all the devices directly to a single hub, then disconnect them one at a time to identify the bad one (if it is only one), then separate the culprit with a dedicated hub. Mauro