Prusa printers are well known for being very silent, even in the standard mode. But actually, our printers also offer an option for even quieter operation. In the instructions below you will learn how to set your printer to stealth mode.
The MINI/MINI+ is equipped with the TMC2209 motor drivers, where after multiple tests we have enabled StealthChop (Stealth mode) by default for X, Y, and Z-axis. The name Stealth mode comes from the MK3/S/+ and basically enables the same settings on its TMC drivers (StealthChop).
On the MINI+, the only exception is the extruder motor. Mainly due to the Bowden tube between the extruder and print head, it performs better and more reliably with the SpreadCycle enabled (that's the other mode of the TMC motor drivers).
MK3 series printers offer two print modes. Normal mode is required for the detection of lost steps (shifted layers), while still being quieter than the silent mode on MK2/S. There is also the Stealth mode, which utilizes Trinamic StealthChop technology. This makes the printer almost inaudible where the print cooling fan is the noisiest part of the printer.
These modes can be switched depending on the situation:
LCD Menu -> Settings -> [Normal / Stealth mode]
LCD Menu -> Tune -> [Normal / Stealth mode]
The silent mode uses less current and makes the printer quieter but less powerful. Hi-power mode is great for very large (over 200 gram) prints. It is also recommended for newly assembled kits before you fine-tune everything. If you experience lost steps (shifted layers) or if you’re manually adjusting the speed of printing to more than 100%, use Hi-power mode.
There is also an Auto Power Mode. This is basically a compromise between silent and hi-power modes. The stepper currents depend on the Z height. The current starts low when the Z height is minimal. And it increases slowly as the object is printed.
These modes can be changed in two ways:
LCD Menu -> Settings -> [Hi-power mode / Silent mode / Auto power mode]
LCD Menu -> Tune -> [Hi-power mode / Silent mode / Auto power mode]