Chamber Fan being set to 100% when a print starts

DruiD · May 14, 2024, 12:36pm

@crazyOC8 @GhostSeven @Warmup @Carlos_Ayala @user_1902567722

So for all of you, its NOT a bug its actually a FIX. Its HIGHLY DOUBTFUL going to be fixed as it IS a fix.

What I hear you cry? yes, its a fix. yes, its legit. The Machine start code, prior to ACTUALLY PRITING was incorrectly set to 70%, what your “used” to hearing. Its been now set to 100% PRIOR to printing to resolve some PLA jamming issues reported by numerous time to Bambu. I am not afflicated with Bambu (wish i was) however its in various placecs, code changes, machine code changes etc if your willing to search, including a mucch bigger thread on this forum and Github where the bug (original 70% fan code) was reported and fixed).

GitHub Link - Chamber fan goes to 100% when warming bed at begining of print job · Issue #4054 · bambulab/BambuStudio · GitHub
Post by Bambu Rep

And the bug it fixed with the incorrect machine code.

github.com/bambulab/BambuStudio

Fixed logic error in PLA jamming gcode for P1S

bambulab:master ← afriede:p1s-gcode-logic-error-pla-jamming

opened 06:28PM - 24 Apr 24 UTC

afriede

+4 -4

Changed the P1S gcode for preventing PLA jamming from: (swapped the inner if an…d elsif around) ```gcode ;=============turn on fans to prevent PLA jamming=================\n {if filament_type[initial_extruder]==\"PLA\"}\n {if (bed_temperature[initial_extruder] >45)||(bed_temperature_initial_layer[initial_extruder] >45)}\n M106 P3 S180\n {elsif (bed_temperature[initial_extruder] >50)||(bed_temperature_initial_layer[initial_extruder] >50)}\n M106 P3 S255\n {endif};Prevent PLA from jamming\n {endif}\n ``` to: ```gcode ;=============turn on fans to prevent PLA jamming=================\n {if filament_type[initial_extruder]==\"PLA\"}\n {if (bed_temperature[initial_extruder] >50)||(bed_temperature_initial_layer[initial_extruder] >50)}\n M106 P3 S255\n {elsif (bed_temperature[initial_extruder] >45)||(bed_temperature_initial_layer[initial_extruder] >45)}\n M106 P3 S180\n {endif};Prevent PLA from jamming\n {endif}\n ``` Before this change even if the bed temperature is greater than 50 the fans would not turn up as fast as they are supposed to, because the first if condition would also trigger and set the fan speed to 180 and not to 255! The changes are difficult to visualize, because the gcode is all in one line, but by using this command locally the changes can easily be verified. ```bash git diff --word-diff=color ```

However, I just got a CONFIG update - that I guess with all the reports, has lowered it back to 45?