Pressure Advance seems to not be working.

[Samuel235]

Thanks for that, much appreciated, makes a little more sense now.

I have now kicked off a print with no coasting and 3mm retraction at 50mm/s and the following acceleration/jerk settings:

M566 X700 Y700 Z60 E3000        ; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 Z3000 E15000 ; Set maximum speeds (mm/min)
M201 X2000 Y2000 Z250 E3000     ; Set maximum accelerations (mm/s^2) 
M204 P1500 T2000                ; Set printing acceleration and travel accelerations

This print is testing the following PA values:

Layers    | PA Value
0 - 25    | 0.5
25 - 50   | 0.0
50 - 75   | 0.6
75 - 100  | 0.0
100 - 125 | 0.7
125 - 150 | 0.0
150 - 175 | 0.8
175 - 200 | 0.0
200 - 225 | 0.9

[Samuel235]

A PA value of 0.7 is still giving me issues. How low should I realistically be looking to take the retraction down to when PA on? This was down to 3mm retraction at 50mm/s...

The interesting thing is that the one line in the infil actually printed with the PA set to 0.9 but nothing else on those layers did...

[Phaedrux]

You could do a reverse test for finding the retraction value. Leave PA set at 0.7 and vary the retraction from 0 to 3mm.

[Samuel235]

This was with 1mm retraction, will be dropping it lower tomorrow:

[zapta]

I spent months struggling to get a decent print quality from my 600mm bowden setup and the problems went way once I switch to a direct extruder.

Just saying

[Samuel235]

I'm waiting for Voron Afterburner to get released out of Beta before switching back to direct drive (have two Wilson 2 printers with Direct Drive). This is simply to get me through to the point where I can print very nice prints until that point. But to be honest with you, I'm burning through filament and time at a crazy speed to get this single issue ironed out, I might just jump onto Voron's direct drive while its in BETA version.

[Phaedrux]

Have you printed much other than test cubes for pressure advance? You can still learn a lot by just adjusting it while printing an actual object. Some pressure advance is better than no pressure advance even if it's not the perfect amount.

The Wilson was my first printer by the way. Good little machine for the time.

[Samuel235]

I haven't, no. I'm about to start printing things with PA of 0.5 to see how it is, ill bring my retraction back up a little bit to 3mm and see how I go from there. I will pick PA testing back up when I convert over to Direct Drive I think, I hate having bowden in the setup, I would much rather sacrifice some speed for quality.

Its still bugging me seeing the extrusion just straight up fail with those PA values I were testing with, I feel like its just a single setting that is hurting my experiments but i'm unsure what it is.

I really enjoyed my time using the Wilson 2's, but I'm so over the sketchup design and the way it performs its probing. I'm all for CoreXY now since joining in with Voron 2.

[oliof]

I have completely disabled PA after switching to KISS with it's looping seam hiding. When going to Hemera, I also disabled KISS' PreloadVE settings which is like slicer based PA to my understanding (but working of an experimentally deduced viscosity model of the material used).

Supermerill's Slic3r++ fork includes looping seam hiding as well, but I haven't tried it yet (the latest build crashes at launch and I haven't tried to figure out why).

[OBELIKS]

@oliof said in Pressure Advance seems to not be working.:

Supermerill's Slic3r++ fork includes looping seam hiding as well, but I haven't tried it yet (the latest build crashes at launch and I haven't tried to figure out why).

He has a fix on the releases page. "You have to remove creality.ini and basic.ini from resources/profiles because they have duplicate lines."
I also need to try it.