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Pressure Advance

Relevant for

MK4 family
XL family
MINI family
MK3.9 family
SOFTWARE
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Pressure Advance aims to improve the quality of printed parts by compensating for the pressure changes in the nozzle during printing. 

It replaces Linear Advance on MK4/S, MK3.9/S, XL, and MINI/+, from firmware version 5.0.0 and above. 

It is possible to find Linear Advance commands, M900, even on printers that support Pressure Advance. In that case, old M900 K commands are automatically converted 1:1 to Pressure Advance value.

The Pressure Advance value is set based on the latest command, either M900 (converted 1:1 to Pressure Advance value) or M572. 

M572 GCode

The Buddy-firmware-specific GCode M572 is used to set parameters for Pressure Advance. 

  • D: Set the extruder number.
  • S: Set the pressure advance value. If zero the pressure advance is disabled.
  • W

PrusaSlicer default start GCode

The default start GCode includes an M572 command that sets Pressure Advance parameters. The example screenshot below is taken from the start GCode of an MK4/S print. 

In this example, the S parameter changes, depending on the nozzle diameter. 

We recommend keeping the default S parameter, optimized for most applications on our printers. 

 

1 comment

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black kvader
•
While you can say that Pressure Advance is "advanced feature" it is very important if you use different filaments (brands). Your PLA prusament is rather stiff and solid, while other brands tend to be more flexible. This results in slightly higher values of pressure advance for other filaments. Could you please add pressure advance calibration to the Prusa slicer? I'm actually surprised that there is no calibration similar to OrcaSlicer. The best value for my PLA (mk4s) is actually around 0.056. Please add calibration to the Prusa Slicer, thank you
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black kvader
•
Sorry, you actually have a calibration feature but you didn't included the link here :)

https://garethky.github.io/PrusaSlicerPressureAdvanceCalibration/
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