Macro for PA testing with Prusa Slicer

mikeabuilder

I thought I'd share this simple macro I wrote for tweaking the PA parameter while printing. I made it because I could not get the prusa slicer code provided in the PA wiki page ( https://duet3d.dozuki.com/Wiki/Pressure_advance) to work for me.

My macro works by inserting an M98 call in the "Before Layer Change" area in the Custom G-code part of Printer Settings in PrusaSlicer. The complete line of code is:

M98 P"0:/macros/PA_tester.g" L[layer_num]

The slicer calls the macro I've named "PA_tester.g" and passes a parameter L and the layer number. This happens for every later change.

The Macro, which I adapted from the PA wiki page looks like this:

; This macro changes the pressure advance setting every 25 layers so that the user can see the effect of different PA values 

; 0.2mm layer, 8 bands 5mm each, total height 40mm
if param.L = 1 
  M572 D0 S0.0
elif param.L== 25
  M572 D0 S0.05
elif param.L== 50
  M572 D0 S0.10
elif param.L== 75
  M572 D0 S0.15
elif param.L== 100
  M572 D0 S0.20
elif param.L== 125
  M572 D0 S0.25
elif param.L== 150
  M572 D0 S0.30
elif param.L== 175
  M572 D0 S0.35

m99

The advantage of this over the in-slicer Prusa version on the PA page (beyond that code not working), is that I can change the PA parameters and the layers they change on and reprint my test part without needing to go back to the slicer.