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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.