Stop Firmware Retract and Pressure Advance from Fighting
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Based what are you say, that how it should work.
PA is for compensating pressure build up in the hotend in different speeds.
When PA would not do its move on retraction you would need different retraction length on different printing speeds. And I can confirm that effect exist on bowden and that is really important when having a full metal hotend where you can not just make the retraction longer at some point.
I was having that issue that without PA when printing 3dbenchy the retraction worked perfectly fine up to the moment when the model cross-section goes small and the slicer slows down, then I would get clog up. With PA that is fine and I don't have to increase my retraction length so it clogs up because of full metal hotend. -
@dragonn I don't have issues with clogging or my all metal hotend's retraction settings. While what you write is an interesting observation, it does not add to my issue here.
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@oliof said in Stop Firmware Retract and Pressure Advance from Fighting:
it does not add to my issue here.Ok but what exactly is the issue? Doing PA when doing retraction, what does it cause for you? Because like I describe in my opinion that by itself isn't an issue and shouldn't cause any problems.
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I already said I will provide a more detailed explanation when I have the time. Please stop pestering me about it now.
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Pressure advance is not applied to extruder-only moves, including both firmware and slicer-commanded retractions/reprimes.
Duet WiFi hardware designer and firmware engineer
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http://www.escher3d.com, https://miscsolutions.wordpress.com -
@dc42 said in Stop Firmware Retract and Pressure Advance from Fighting:
Pressure advance is not applied to extruder-only moves, including both firmware and slicer-commanded retractions/reprimes.
Perhaps the use of "wipe while retract" could cause the behaviour being described by the OP? It will retract some amount of the retract distance while backtracking along the X/Y path for some distance. Then, it will retract the remaining retraction amount (if any) in a normal retraction move.
Disabling this slicer feature might provide the more intended firmware/PA behaviour.
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@bot can you even use wipe while retract when doing firmware retract? I think not
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@dragonn nice catch, I missed that part somehow.
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@dc42 what's with firmware retract with z hop? Either way, they seem to be applied directly after another which seems to lead to very noisy extruder back-and-forth.
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@oliof said in Stop Firmware Retract and Pressure Advance from Fighting:
@dc42 what's with firmware retract with z hop? Either way, they seem to be applied directly after another which seems to lead to very noisy extruder back-and-forth.
When G10 is executed, retraction happens first, then Z hop. G11 undoes the Z hop, then undoes the retraction.
