Ellis Pressure Advance Pattern for Prusa Mini

This gcode uses the following parameters:

• Nozzle temp: 210
• Bed temp: 60
• Input Shaper: off
• Pressure Advance Factor: 0.1 until 0.5, steps 0.02
• Pressure Advance Smooth Factor: 0.06

I like the print tuning guide from Andrew Ellis and tried all his suggestions :-)

This is the pattern for tuning the Pressure Advance/Linear Advance which does not fit exactly what I needed, so I have modified the generated G-Code to fit my needs. Andrew assumes that Marlin supports Linear Advance but with the new firmware from Prusa the Mini supports Pressure Advance instead. Both are very similar, the value of the factor has the same meaning but Pressure Advance additionally supports a smooth factor which is the time used to calculate the speed change. The default for the Mini profile is 0.06 seconds, but  you can change it to experiment with other values. In order to change it in this gcode just search for the line:

M572 W0.06 ; set smooth time

and change the value after the W. This will set the value for all subsequent M572 commands.

It is unlikely that you will see a big difference in this pattern because there is only one sharp corner but if there would be a more complicated path then this could/should have an effect.

So this print will give you just an easier to read indication for the best k-factor (or S-factor in M572 terms) than for example this print.

From the pictures you can see that the corner is the point to look at. If there are gaps then the factor is to high, you look for the first one without a gap and a sharp corner. I used 0.29 as the value from this print.

It's easy to modify the G-Code for your needs, all relevant lines have a comment. Just open this with a text editor and change the values as you like.

Happy printing and don't forget to leave a like!

Changes:

10/29/2024 Added gcode file for PETG; Bed temp 85°C, Hotend temp 230°C