Yep, it was the power converter ! The implementation of the MP1584EN is straight from the datasheet, so it's relatively easy to figure out what is what. I desoldered the pin 1 of the MP1584EN, and connected an external 5V after (or before*) the inductor. The board work fine now, even if it's a really ugly fix, and i can't connect to the USB with the external power ON (garbled communication). Butby Moff_Tigriss - Controllers
Did an ultimate test : remove Marlin, and use the sketch example AnalogReadSerial. Power only via USB, measure is very stable. Power only via PSU, measure really unstable. Power both, measure really unstable. Using a real good 12V PSU change nothing. Main power is grounded. There is a thing, the power converter output is 4.40 when powered by 12V, but 4.90 when powered by USB only. So maybe theby Moff_Tigriss - Controllers
Hi ! I have an issue with my new MKS Gen L with Marlin 1.1-bugfix, the temp reading is not stable, oscillating between 18-27°c with a room temp of 20. Facts : - Nothing connected to the board, no drivers. - It's the same with nothing connected to the probe pins, or a fixed resistor. All three probe pins does the same (I don't have what to make my own pull up resistor to test with another analogby Moff_Tigriss - Controllers