Holes in Infill

I am running PA tuning right now with 15% infill and i discovered something that looks like underextrusion in the infill. Anyone has an idea what could be the cause? I am using PLA for printing and am kinda struggling to get consistent and good results
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Solution:
It was a mixture of overcooling and too high printspeeds. Regular (not High Speed PLA) is hard to dial in. had to lower speeds to 80-100 to get some good results here. Cooling at max is 30% (part cooler is too STRONK! )
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7 Replies
Matze
MatzeOP2mo ago
Maybe 300 mm/s is too much for printing infill in PLA. Reduced to 250 and trying again. Anyone has some solid printing settings for PLA to start with? I think my settings maybe a bit off for what PLA actually needs
03Julian04
03Julian042mo ago
I have the same problem not as much as you have but also a little bit even if I am way more under the max flow my hotend can do
DapperDangus
DapperDangus2mo ago
Have you tried different infill? Gyroid or crosshatch?
Matze
MatzeOP5w ago
Not yet, will try later. But i guess i am just trying to print too fast.
DapperDangus
DapperDangus5w ago
For sure. Considering your walls look pretty good I’d say so.
Brace
Brace5w ago
Possibly overcooling for the set temp. I’m guessing your layer time is short which means your fan may be at 100 or close to it which would cool the tip below the set temp. UHF is great but it also adds a considerable distance from the tip to the heating element. The silicone sock can only do so much.
Solution
Matze
Matze2w ago
It was a mixture of overcooling and too high printspeeds. Regular (not High Speed PLA) is hard to dial in. had to lower speeds to 80-100 to get some good results here. Cooling at max is 30% (part cooler is too STRONK! )

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