Pressure in advance and retraction

peirof

Hi,

I am having some problems with PETG and retractions, when I try to Print some objects in the same bed... In first layers I have clogs... However, if I print one or two copies of the same model, I do print it...

I think that can be an issue of retractions... If I fine tuning pressure in advance can quit or almost reduce retractions?

Phaedrux

Yes pressure advance will usually allow for less retraction distance and if you don't reduce the retraction distance when using pressure advance, you can get clogs on retraction as it pulls back too far.

peirof

some idea where start?
Can someone post your config?

In this moment have this:

Short Bowden, aprox 20 cms.
Pressure in advance: M572 D0 S0.1

Settings for

PLA

Retraction distance? - 4 mm
Retraction speed? - 40 mm/s

ABS

Retraction distance? - 4 mm
Retraction speed? - 40 mm/s

PETG

Retraction distance? - 4 mm
Retraction speed? - 40 mm/s

When i try to print various objects, i have clogs in first 20 layers, aprox

jens55

try retraction of 1.5 mm and speed of 30 mm/sec

peirof

@jens55 thanks, layer try