Enclosure Plugin with PMW fan

Dale_128 · June 14, 2021, 4:02am

Anyone know how to configure the Enclosurer Plugin with Nocturna 5v pmw fan.
I not sure how to wire or set the settings. I want to run Fan PMW off of temp 1.
Im using a 74AHCT125 level shifter, Using GPIO pin 18. using level shifter to go to 5 volts on PMW line in to fan. Fan runs when the PMW line is disconnected.
Temp sensors work and report correctly.

Ewald_Ikemann · June 14, 2021, 5:16am

I assume you made your fan setup according this site:

github.com/vitormhenrique/OctoPrint-Enclosure

PWM frequency for Noctua fans

opened 03:42PM - 04 Oct 20 UTC

wmonzel

**Describe the bug** Noctua PWM fans typically require a target frequency of 25…kHz. Regardless of the PWM frequency specified, the maximum frequency is 5.367 kHz as measured with an oscilloscope. Testing done using a Raspberry Pi 4 (4GB), PWM0 (GPIO12) and PWM1 (GPIO13) [octoprint (3).log](https://github.com/vitormhenrique/OctoPrint-Enclosure/files/5323521/octoprint.3.log) **To Reproduce** Steps to reproduce the behavior: 1. Octoprint settings -> Enclosure Plugin 2. Click on "Add Outputs" 3. Output type: PWM 4. I/O number: 13 5. Start with Server 6. PWM frequency: 25000 7. Default duty cycle: 50 8. Save settings and reboot system 9. Attach scope probe to header pins 33 (PWM1) and 34 (ground) and observe results. **Expected behavior** A stable 25kHz square wave with a 50% duty cycle should be observable on the scope. **Additional context** See attached log. Note: hardwarePWM does provide expected results.

If not, maybe you find a clue there.

Dale_128 · June 20, 2021, 1:56am

Yes followed that and can not get the fan to work. Don't have scope. Looks like others have same problem. Does anyone actually have the pmw working

Dale_128 · July 5, 2021, 7:54pm

Got a DSO180 Oscilloscope found the problem was the settings. Hooked the NOCTUA FAN PMW lead direct to the PI, pin18. Did not need 74AHCT125 - QUAD LEVEL-SHIFTER to 5 volts. The Default Duty Cycle must be set to 0 and PWM Frequency to 2500 not 25000 like the guide says.