Topics created by sac

the fans on the SE are wired straight through, except that the HF has the illumination LED string in parallel with it. So more likely the problem is bad wiring, or the outputs on the Duet.

So test your fans directly connected to the Duet. If they work there, then test your wiring harness. If they work there, then it may indeed be something on the smart effector.

@bearer said in Sudden consistent under-voltage events:

Measure voltage at PSU and at Duet Vin to see if there is a difference that would suggest bad wiring leading to excessive voltage drop. 10.9 to 11.1v for a 12v supply when idle is a bit on the low side i would think

Good idea.
Most power supplies with metal frame and terminals got a little potentiometer close to the terminals. You can adjust your output voltage to the nominal 12V by turning that potentiometer. You only got around 11V which is a bit low.