Questions related to Tuning pressure advance

Basic Information:

Printer Model: Prusa i3MK3S+
MCU / Printerboard: Einsy
Host / SBC RPi5

Describe your issue:

I am trying to do PA using the procedure described in:

Pressure advance - Klipper documentation

Since I am using a 0.4mm nozzle, the layer height of 75% of the nozzle should be set to 0.3mm. As for the speed, it says "use a high speed (eg, 100mm/s), there are many speeds in OrcaSlicer. Which one(s) should I set to 100mm/s?
For this calibration test, what values of accelerations and jerks should I use?
What is the order of printing? Shall I checked “Enable pressure advance” in the slicer under Filament->“Flow ratio and Pressure Advance” but set the initial value to, say 0.065 found using the pattern method in the slicer’s PA Calibration?


Other layers speed
Outer wall: 15 mm/s 
Inner wall: 150 mm/s
Small perimeters: 50%
Sparse infill: 150 mm/s
Internal solid infill: 150 mm/s
Top surface: 100 mm/s
Gap infill: 30 mm/s
Support: 80 mm/s
Support interface 80 mm/s

Acceleration
Normal printing: 500 mm/s^2
Outer wall: 3500 mm/s^2 (based on Input Shaping result)
Inner wall: 10000 mm/s^2
Bridge: 50%
Sparse infill: 100%
Internal solid infill: 100%
First layer: 300 mm/s^2
Top surface: 3500 mm/s^2 (based on Input Shaping result)
Travel: 10000 mm/s^2
Enable accel_to_decel: checked
accel_to_decel: 50%

Jerk (XY): all at 2mm/s

You may have a look on one of these: Pressure Advance / Linear Advance | Ellis’ Print Tuning Guide , https://teachingtechyt.github.io/calibration.html#linadv

1 Like

I read the Ellis’s guide already and the teachingtechyt mentioned Marin.

Oops - sorry.

Use your normal printing acceleration values. You can tune that separately if you like, then redo the PA calibration. Set jerk to 0 or disable. You can set the first layer speed to something reasonable to get good bed adhesion but then after that set every printing speed to 100. Disable PA in the slicer, although it may not matter because the TUNING_TOWER command in the documentation will override that anyway. Order of printing shouldn’t matter because the test object should only be printed with 1 wall and no infill anyway.

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