Geeetech

have solved.

299/5000
In fact I solved with only one potentiometer connected to the PJ2 jumper.
In this way the Jumper is open (just do not put the potentiometer to maximum) and you can adjust the voltage from 12 to 24 volts, then the voltage regulator does the rest. Noise is gone and the prints are excellent ...

The problem is to be solved on 3 fans and not on one.
If the Jp2 jumper is open, the fans will reach a maximum of 12 volts right?
This voltage is not sufficient to make the fan work properly on the Bowden heatsink (because the fan is 24 volts) which will therefore not cool the heatsink well and ...

Hi, I have the same problem too.
From what I understand it is likely that in the two "noisy" printers mount a card gt2560 <= Rev B, in the one that works well, mount a gt2560 V3 ...

I mount a gt2560 rev B and I tried to solve the problem via firmware but I failed because I could understand how to ...

oh.. bene.. mi vado ad iscrivere subito

Salve, ci sono anche io da Reggio Emilia. Presa da una settimanata (prima avevo una DIY clone prusa)...
regolata, risolti un paio di problemi... ora sembra stampare molto bene. Sto solo sperimentando/cercando le impostazioni da utilizzare
per ottimizzare la stampa.