Pressure Advance Calibration
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Just want to share a few changes I made in the python script.
- Prints a box instead of two walls
- Tidied up the skirt generation as id did some strange moves
- has a text block for starting gcode and end gcode
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May I ask for help interpreting the result? Looks like the higher PA is the better the result? I'm using a direct drive. Thanks.
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@MartinNYHC Yes it would appear that way buy you should also test with an actual print to check for any unintended behaviours of running with a high pressure advance value.
How long is your bowden tube? Have you tried the cube wall method shown here? https://duet3d.dozuki.com/Wiki/Pressure_advance#Section_Simplest_Method_Possible
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@Phaedrux There's only a short PTFE tube between extruder and hotend. I think it's about 20mm. Will do some additional tests today.
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I've updated the *.py file with
- preamble
- postamble
- klipper compatibility
- Marlin compatibility
These are my results:
Delta Fyling extruder PA 0 - 0.5 over 40mm PLA
Delta Fyling extruder PA 0 - 0.5 over 40mm PLA carbon fiber
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I have tuned PA according to the method in the wiki, not with the script, but by printing a 100mm cube and adjusting on the fly. I have settled on 0.7, with a bowden tube of around 480mm length.
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@duosvid said in Pressure Advance Calibration:
I have tuned PA according to the method in the wiki, not with the script, but by printing a 100mm cube and adjusting on the fly. I have settled on 0.7, with a bowden tube of around 480mm length.
overall surface and z-seam look better, I'm now getting gaps in the infill - not in the parameters though . .
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@duosvid said in Pressure Advance Calibration:
@duosvid said in Pressure Advance Calibration:
I have tuned PA according to the method in the wiki, not with the script, but by printing a 100mm cube and adjusting on the fly. I have settled on 0.7, with a bowden tube of around 480mm length.
overall surface and z-seam look better, I'm now getting gaps in the infill - not in the parameters though . .
It's not uncommon to need to increase perimeter overlap slightly after tuning pressure advance.
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@dc42 said in Pressure Advance Calibration:
Yes that's a valid approach. It's on our list to add a generator of pressure advance tests scripts to reprapfirmware.org, but it hasn't happened yet.
I know this is a super old thread but wanted to check anyway. Has the generator been created and added? If so, could you provide the link, please?
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@tmitch205 my version of the klipper one generated RRF compatible pressure advance tests https://jaysuk.github.io/Voron/PA/pressure_advance.html
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Couldn't get this working, turns out Powershell encodes terminal output as UTF16LE. It will crash the Duet when you try to start it. Convert to UTF8 and smooth sailing.
Thanks!
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