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[BUG] USB Not working #555

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opened 2024-11-14 09:46:05 -06:00 by rawnullbyte · 5 comments
rawnullbyte commented 2024-11-14 09:46:05 -06:00 (Migrated from github.com)
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Bug Description

I flashed the printer (Anycubic 4max pro 2.0) and when i connect it to pc it beeps, but pc just says connecting..., idk how to fix that
EDIT: Yes i tried all baudrates

Steps to Reproduce

  1. Flash firmware

  2. Connect to pc

  3. Use for example pronterface to connect

Expected behavior: Connect

Actual behavior: Beep, fast 3d printer lights flash

Additional Information

https://github.com/user-attachments/assets/de025771-cf64-4296-b905-94241a77feb3

  • Provide pictures or links to videos that clearly demonstrate the issue.
  • See How Can I Contribute for additional guidelines.
<!-- ------ PLEASE USE THIS TEMPLATE! -------- Have you read all Wiki articles in cluding the FAQ? yes https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/wiki Do you want to ask a question? Are you looking for support? Please don't post here. Instead please use one of the support links at https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/issues/new/choose --> ### Bug Description I flashed the printer (Anycubic 4max pro 2.0) and when i connect it to pc it beeps, but pc just says connecting..., idk how to fix that EDIT: Yes i tried all baudrates ### Steps to Reproduce <!-- Please describe the steps needed to reproduce the issue --> 1. Flash firmware 2. Connect to pc 3. Use for example pronterface to connect **Expected behavior:** Connect **Actual behavior:** Beep, fast 3d printer lights flash #### Additional Information https://github.com/user-attachments/assets/de025771-cf64-4296-b905-94241a77feb3 * Provide pictures or links to videos that clearly demonstrate the issue. * See [How Can I Contribute](#how-can-i-contribute) for additional guidelines.
knutwurst commented 2024-11-14 10:38:34 -06:00 (Migrated from github.com)
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Is it possible that you have other programs that access the virtual serial interface? This behavior is actually typical of another program repeatedly resetting the connection.

The beeps from the printer always come when the firmware starts.

Sometimes it is just a bad USB cable.

It is also possible that the potential is equalized via the USB cable if both devices (printer and laptop) are connected to different circuits and both are connected to the protective conductor. Try running the laptop on battery power only without any other cables.

Is it possible that you have other programs that access the virtual serial interface? This behavior is actually typical of another program repeatedly resetting the connection. The beeps from the printer always come when the firmware starts. Sometimes it is just a bad USB cable. It is also possible that the potential is equalized via the USB cable if both devices (printer and laptop) are connected to different circuits and both are connected to the protective conductor. Try running the laptop on battery power only without any other cables.
rawnullbyte commented 2024-11-14 10:50:25 -06:00 (Migrated from github.com)
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Is it possible that you have other programs that access the virtual serial interface? This behavior is actually typical of another program repeatedly resetting the connection.

The beeps from the printer always come when the firmware starts.

Sometimes it is just a bad USB cable.

It is also possible that the potential is equalized via the USB cable if both devices (printer and laptop) are connected to different circuits and both are connected to the protective conductor. Try running the laptop on battery power only without any other cables.

The cable is okay, the laptop on video was already running on battery. None of programms were opened

> Is it possible that you have other programs that access the virtual serial interface? This behavior is actually typical of another program repeatedly resetting the connection. > > The beeps from the printer always come when the firmware starts. > > Sometimes it is just a bad USB cable. > > It is also possible that the potential is equalized via the USB cable if both devices (printer and laptop) are connected to different circuits and both are connected to the protective conductor. Try running the laptop on battery power only without any other cables. The cable is okay, the laptop on video was already running on battery. None of programms were opened
BlockListed commented 2025-05-28 15:23:47 -05:00 (Migrated from github.com)
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I'm having a similar issues. The printer was working fine over USB for a long time (octoprint). Then after switching to another system and back it stopped connection, sometimes outputting garbage, sometimes outputting nothing at all. I have tried multiple USB cables and computers.

I'm having a similar issues. The printer was working fine over USB for a long time (octoprint). Then after switching to another system and back it stopped connection, sometimes outputting garbage, sometimes outputting nothing at all. I have tried multiple USB cables and computers.
BlockListed commented 2025-05-28 15:31:43 -05:00 (Migrated from github.com)
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PS: Changing baudrate to 250000 fixed my issues somehow.

PS: Changing baudrate to 250000 fixed my issues somehow.
rawnullbyte commented 2025-05-28 16:40:49 -05:00 (Migrated from github.com)
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I got a new 3d printer, no issues at all.

I got a new 3d printer, no issues at all.
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Reference: wp/Marlin-2-0-x-Anycubic-i3-MEGA-S#555
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