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prusa3d / Prusa-Firmware-Buddy

Firmware for the Original Prusa MINI, Original Prusa MK4 and the Original Prusa XL 3D printers by Prusa Research.
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[QUESTION] Where is the hotend fan PWM setting in firmware? #2081

Closed Veridus closed 2 years ago

Veridus commented 2 years ago

Hey there, My question is simple and just as in the title. Where can I find the set PWM for the hotend fan? I know there already are some open questions about this, but in ticket #997 somebody mentioned that it is not valid any more. I've searched in the files a bit, but didn't find it. Maybe somebody else who is more experienced with the current mini firmware can help me out and tell me where I can find what I'm looking for. For background, I need it since I swapped the fan to a Noctua and with the current set PWM, it runs quite slow.

threepoint2 commented 2 years ago

file: /src/common/hwio_a3ides_2209_02.cpp

line 524: void digitalWrite(uint32_t marlinPin, uint32_t ulVal) case MARLIN_PIN(FAN1):

ifdef NEW_FANCTL

if (hwio_fan_control_enabled) fanctl_set_pwm(1, ulVal ? (100 * 50 / 255) : 0);

else. ...

change to if (hwio_fan_control_enabled) fanctl_set_pwm(1, ulVal ? 50 : 0);

Prusa-Support commented 2 years ago

Hello! Sorry for replying so late to the thread. There was a renaming/refactoring from "a3ides" to "buddy", the hardcoded PWM and RPM intervals are now on this file: https://github.com/prusa3d/Prusa-Firmware-Buddy/blob/master/src/common/config_buddy_2209_02.h

Alessandro Pantaleo Prusa Research

Veridus commented 2 years ago

Thanks for the replies @threepoint2 and @Prusa-Support. I've modified the 3.4.3 release version in the file /src/common/hwio_a3ides_2209_02.cpp line 620 with:

ifdef NEW_FANCTL

        if (hwio_fan_control_enabled)
            fanctl_set_pwm(1, ulVal ? 69 : 0);

which worked great with the Noctua fan. Now I'm getting a solid fan speed. What you @Prusa-Support mentioned is in the new master, which will help when you update to a new release version. For now, I would rather not use the master since it is a prerelease and I still want my printer to run with no problems.