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Repeated retraction causing heat creep  

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__fense
(@__fense)
Active Member
Repeated retraction causing heat creep

I'm trying to print a lot of very small parts at once, and my hotend keeps getting clogged at the heatbreak towards the end of the print when there are a bunch of tiny towers at the top of the parts that aren't connected to each other. I can tell that I'm doing so many retractions so quickly that I'm getting heat creep, but I don't know how to solve it. Is there a setting in PrusaSlicer that will slow down print speeds when it sees a lot of retractions all in a row? I know there's one for layer time, but the layers are actually taking a while to do because of all of the different parts. I don't have any problem with retractions when I'm printing normal things. And I don't want the stringing that I know will happen if I turn retraction off entirely. Is there some trick to avoid this?

 

I'm using PrusaSlicer, PLA, and a .25mm nozzle (but I still had the problem while using a .40mm, so I don't think that's relevant)

Posted : 16/07/2020 5:10 pm
bobstro
(@bobstro)
Illustrious Member
RE: Repeated retraction causing heat creep

Are you printing in an enclosure or ambient temps over 40C? 

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Posted : 16/07/2020 5:30 pm
__fense
(@__fense)
Active Member
Topic starter answered:
RE: Repeated retraction causing heat creep

Nope, It's in an air conditioned office. About 23-25C and consistent temperatures.

Posted : 16/07/2020 5:38 pm
Peter M
(@peter-m)
Noble Member
RE: Repeated retraction causing heat creep

Try less retraction?

Posted : 19/07/2020 5:42 am
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