2 replies

9GAX0412P3S001 40x28 fan - 0 RPM reported through tacho

I know the tacho reporting is quality of life only.
There are two 4-pin PWM fans in my setup; a Noctua 120mm and the Sanyo Denki 9GAX0412P3S001 (part cooling).

Both are configured and working properly, except the tacho wire for the 9GAX0412P3S001.
It is configured in RatOS, the wire continuity is checked, I have triple-checked the pinout, but the reported speed is always 0.

Configuration below:

[fan]
pin: !fan_part_cooling_pin
cycle_time: 0.00004
tachometer_pin: ^PG15
tachometer_poll_interval: 0.0005

For the Noctua 120mm fan (which works and displays RPM), the configuration is:

[controller_fan controller_fan]
pin: !PD15
tachometer_pin: ^PG14
tachometer_poll_interval: 0.0005
cycle_time: 0.00004

Now, the only reason I could think of is tachometer_poll_interval value needing adjustment, I have used all the way to 0.00001 with no success.

Maybe there is someone out there who did configure it, and would be kind enough to help me figure out which values to use.

Thank you!