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Experimental settings

(MK4/S, MK3.9/S, MK3.5/S, XL, MINI/+)

Relevant for

MK4 family
XL family
MINI family
MK3.5 family
MK3.9 family
3 comments
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The components installed on your printer rely on firmware configuration. To facilitate the installation of components sourced from third-party vendors, we introduced an experimental settings menu. Since different hardware has different specifications, the firmware can adjust the defining parameters of some components.

The experimental menu is for advanced users. You should not change these firmware parameters for a printer with stock parts! It can cause bad performance or even damage the printer and its parts.

To activate the experimental menu, navigate to LCD menu -> Settings and scroll down to Hardware without selecting it with a short-press (left picture). Instead, hold the LCD encoder for 2-3 seconds, and the Experimental menu will appear (right image).

Long-press this option. 
After holding 2-3 seconds this menu will appear.

Save and return: Saves the current values and returns to the previous screen.

  • Z-axis length: In this menu, the Z-axis length can be adjusted according to the size of your extruder.
  • Reset Z-length: resets the Z-axis length to default/stock.
  • Extruder step / Extruder steps per unit: set the steps appropriate for your extruder.
  • Reset steps per unit: resets Extruder steps to default/stock.
  • Extruder direction: shows two options for the extruder motor direction. The default/stock is "Prusa", and the other is "Wrong".
  • Reset directions: resets extruder direction to default/stock.

Save and return

After the correct settings are changed, select Save and return. The printer will ask you whether you want to save the changes and reboot the printer. On reboot, your printer will have the new settings for your custom extruder. This will ensure that even with adjusted parameters the printer can still perform First Layer Calibration, Live Adjust Z, and print.

Adjusting settings in the experimental menu is at the owner's risk. Prusa Research takes no responsibility for the possible issues or damage to the printer. However, we are ready to help you bring the printer back to the factory setup.
 

3 comments

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MagnusVesper
You don't have scroll down to hardware. Holding the knob down for 2 seconds anywhere in the settings menu and its submenus will open the experimental settings.
Stefan
Good thing, yes, but still at your own risk.
At least one can reset manipulations when not done physically.
Mag. Wolfgang Praxl (Vienna, A)
Das ist echt super, dass ihr das eingebaut habt. Kein Pfriemeln an der Firmware und brechen des Buddy-Board mehr notwendig.  It's really great that you included it. No more breaking the buddy board and fiddling with the firmware.