[BUG] Print fan not spinning error after changing from 0% to 30%

derenma commented 2 years ago

Printer type - MINI

Printer firmware version - 4.4.0b1

Original or Custom firmware - Original

Optional upgrades - Runout sensor, bondtech extruder, ESP-01s

USB drive or USB/Octoprint - USB

Describe the bug During the first few layers, the print fan stops at random. Both hotend fans self-test as OK.

The fan speed error can happen during the first few layers when the fan is supposed to be at 0%. The firmware seems to not like the 0% fan setting now.

Workaround: I currently have menu timeout disabled and open the "tune" menu after the print starts. After the "fan not spinning error" happens I can press the "continue" button as the UI reverts to the last open menu. (Since I have the tune menu open, the UI reverts to that, not the home screen.) I then make a print fan speed adjustment so I can see the fan turn back on. One the fan is turned back on, I can resume the print.

Workaround 2: Disable fan checks. (Not ideal.)

In some cases, the above steps have to be taken 2-3 times before the print continues as normal.

How to reproduce (In my case) Have the print fan at 0% for the first few layers and the print will halt with a recoverable error.

Expected behavior The fan starts and stops as expected and the fan speed check is done correctly.

G-code

AllanKey_Wall v1.zip

Crash Dump

I have it, but github will not let me attach it for some reason??

Video