Bytes_retransmit increases, and Transition to shutdown state: MCU

General Discussion
1

Hello, I’m having a problem with my printer. It was working fine for two years, but recently, it started disconnecting at the beginning of printing. The situation is standard: bytes_retransmit increases, and Transition to shutdown state: MCU shutdown occurs. However, it’s interesting that some models print normally, while others disconnect after 4-5 minutes. It’s possible that the issue is related to a recent update. I’ve tried turning off and on the MCU, but the connection only restores when I press FIRMWARE_RESTART. MCU F446 (V10) motherboard Printer, host orange pizero 3 Debian GNU/Linux 12 (bookworm), TronxyX5SA printer.

moonraker.log (74.0 KB)

klippy.log (806.8 KB)

2

dmesg.txt (55.3 KB)

3

It seems to me:

Receive: 68 1251.131544 1251.099744 14: seq: 12, analog_in_state oid=20 next_clock=2194079232 value=2073
Receive: 69 1251.146191 1251.145707 11: seq: 13, clock clock=2143972301
Receive: 70 1251.331707 1251.145707 15: seq: 13, analog_in_state oid=10 next_clock=2230079232 value=27415
Receive: 71 1251.431531 1251.338990 14: seq: 17, analog_in_state oid=20 next_clock=2248079232 value=2123
Receive: 72 1251.631539 1251.589229 15: seq: 1b, analog_in_state oid=10 next_clock=2284079232 value=27415
Receive: 73 1251.731620 1251.589229 14: seq: 1b, analog_in_state oid=20 next_clock=2302079232 value=2196
Receive: 74 1255.281031 0.000000 11: seq: 11, shutdown clock=88087100 static_string_id=Invalid oid type
Receive: 75 1255.283874 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 76 1255.283886 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 77 1255.284547 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 78 1255.284549 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 79 1255.284551 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 80 1255.285191 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 81 1255.285193 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 82 1255.285808 0.000000 7: seq: 12, is_shutdown static_string_id=Invalid oid type
Receive: 83 1255.286305 1255.285725 10: seq: 13, clock clock=88986898
Receive: 84 1255.286311 1255.285725 10: seq: 13, clock clock=88987494
Receive: 85 1255.286942 1255.285725 10: seq: 13, clock clock=88987870

This shutdown happens because the MCU has been rebooted for some reason.
It seems to me that the clock is reset.
Maybe PSU has given up, and there is a drop of voltage, just a pure guess.

Hope that helps a little.

4

Thanks, I’ll try to look in this direction.

5

I checked the power supply and the MCU, and it seems to be working properly. The other model printed without any issues, but I think there might be a problem with the host. I will continue to investigate the cause.