Computer can't see Ender-3 v2 Neo

Ender Series Creality Ender-3 V2
1

Good afternoon all,

I have a Ender-3 V2 Neo and I can print just fine (as fine as a newbie can after devouring any print setup, slicer setup and print test the internet provide).

I’m trying to setup a Raspberry Pi with OctoPi to monitor and adjust settings remotely and I can’t connect any computer to my 3D printer.

I have :

  • tried multiple USB Cables (including a high quality chromecast cable),
  • tried multiple computer (1x raspberry pi running octopi + 2x windows 11 pro laptops),
  • installed the CH340 drivers on all computers,
  • tried all the USB port on all computers,
  • tried to connect via Creality Slicer, Prusa Slicer, OctoPrint

and I still can’t connect to my printer. The device manager on windows don’t see anything (not even unknown devices), nor the OctoPi (ls /dev/tty* or dmesg | grep -i usb).

I did notice that if I turn the printer’s power off and leave it connected to my computer, the printer’s board has power and I can go through the menu but the motors don’t have power to move and the board freeze if I try to move the head.

What could be the issue? What am I missing?

Is my only option to replace the printer’s main board? Is there a bypass where I could connect directly to the main board?

I thank you for your support and guidance.

A.

2

hey so I have/had this same issue. what you need to do is cover the 5v connector pin with electrical tape (I know this sounds crazy) on the USB cord connecting to your pc (Link:Put tape on the 5V pin - Why and how - FAQ - OctoPrint Community Forum) to stop power being sent to your printer. Secondly for some reason the ender 3 will throw codes not allowing the pc to connect. What you need to do is turn the printer off disconect the USB cord from both the pc and the printer. Wait about 10 seconds, then plug the usb in and turn on the printer. Both of those things allowed me to FINALLY be able to print via usb after hours of troubleshooting. Hope this helps!