Hi !
I tried the DRV8825 and with microstepping it was a bit more quiet but not as silent as i want.
I´m considering to switch out the geared stepper for something else to make it silent.
The benefit of using the planetary geard stepper is that i dont need to have any brakes och use the stepper to hold the shaft locked due to its internal mechanical resistance.
The downside is the slow speed and long motor body.
I have looked at these closed loop stepper: https://www.omc-stepperonline.com/ts-series-1-2-nm-170oz-in-1-axis-closed-loop-stepper-cnc-kit-nema-23-motor-and-driver-w-2m-cable.html
The youtube videos i can find about it the motor runs totaly silient. With the high microstepping i can get it to be slow enough and hopfully strong enough.
The downside is the none internal resistance to hold motor position but the encoder and driver looks like it can handle that by itself.
I have looked att O drive and simpleFOC and some brushless motor with encoder wich looks cool and also silent but a bit more components to work with.
Any advices about choosing an motor/driver options?
Best Regards
Andreas