Best posts made by rs4race

@deckingman Do you have any resources for tuning acceleration and jerk?

@gnydick said in Pressure advance calibration:

@Phaedrux the linear advance script does exactly the same thing as the pressure advance. The only difference is the layout.

The PA script stacks the layers so you look at the front of the model and look for the gradients to go away.

The LA script draws them side by side and you look for which line is most consistent in it's thickness.

That is the same test.

Is this script here somewhere?

@phaedrux I skimmed through that post, but was hoping there was something more user friendly like the linear advance gcode generator.

I want to share some of my experience tuning pressure advance. It was mentioned that you will need to recalibrate retraction.

I'm using a bowden tube setup and at higher speeds (100mm/s) I was missing material at the start of extrusion. Increasing prime amount would fix the higher speed problems but leave blobs at lower speeds (25mm/s). To resolve this I had to reduce the retraction distance. I ended up with retractions similar to a direct drive and no extra prime amount. I ended up with the following retract and pressure advance settings:

M207 S2.0 R0.0 F3600 T600
M572 D0 S0.3

This is with the following setup:
E3D Volcano, 0.4mm nozzle
550mm Capricorn XS Bowden tube
Bondtech QR Extruder
1.75mm Amazon Basics PETG

Extruder config settings per request: (these are not necessarily limits of the extruder)

M350 E32:32 ;microstepping
M92 E953:953 ;steps/mm
M906 E900:900 ;motor currents
M201 E1000:1000 ;accelerations
M203 E3600:3600 ;maximum speed
M566 E900:900 ;maximum jerk speed

Before Tuning these settings I was printing slower (50mm/s) with 6.5mm retraction distance.