Over and underextruded solid top layer

My solid top layers are both under and overextended at the same time. Has anyone any hint? Flow is tuned. PLA @ 210, 60mm/s top layer and 1k acceleration, 60% fan, VC4 idex
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27 Replies
tobi0892.
tobi0892.OP10mo ago
Any ideas? I don’t understand this..
tobi0892.
tobi0892.OP10mo ago
When I do a test print with one solid bottom layer, 2 infill and 4 top, I got a perfectly smooth top surface
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tobi0892.
tobi0892.OP10mo ago
And next time I print the real model I get again the over and underextrusion pattern
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tobi0892.
tobi0892.OP10mo ago
I have also this issue that the first layer gets worse over time and also there the weave pattern: https://discord.com/channels/582187371529764864/1315742724221304903/1315742724221304903
tobi0892.
tobi0892.OP10mo ago
Wasteland 😂
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tobi0892.
tobi0892.OP10mo ago
some additional information:
tobi0892.
tobi0892.OP10mo ago
my slicer project
tobi0892.
tobi0892.OP10mo ago
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tobi0892.
tobi0892.OP10mo ago
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tobi0892.
tobi0892.OP9mo ago
Anyone? @Helge Keck do you have any additional idea? I am not sure if this is related to the first layer issue: https://discord.com/channels/582187371529764864/1315742724221304903. Mesh is now within .1 range
tobi0892.
tobi0892.OP9mo ago
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tobi0892.
tobi0892.OP9mo ago
Flow is perfect except those areas
tobi0892.
tobi0892.OP9mo ago
One more with over and underextrusion very close to each other. Underextrusion at line end. Layer height 7.16; monotonic infill and 38% overlap
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tobi0892.
tobi0892.OP9mo ago
One more (bottom right overextension). I am not almost at 8kg wasted PLA 😦
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tobi0892.
tobi0892.OP9mo ago
Has anyone an idea?
tobi0892.
tobi0892.OP9mo ago
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TheTik
TheTik9mo ago
Is that just visual, or is the plastic actually warped much? Like, is this just a cosmetic issue?
tobi0892.
tobi0892.OP9mo ago
These are under = physical gaps and overextrusion = waves/lumps at the same time on the top layer. Interesting is that if I print the exact same shape on the same VC4 in just 2mm (cutted of from the top), then the top surface is perfect
tobi0892.
tobi0892.OP9mo ago
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tobi0892.
tobi0892.OP9mo ago
From 2 to 10mm z is enough that the top surface is not perfect anymore
Pad
Pad9mo ago
Might be PA? I've seen that on my printer before tuning PA?
tobi0892.
tobi0892.OP9mo ago
PA is tuned did the tuning based on ellis guide has anyone an idea? 😦
boinappi
boinappi9mo ago
For the wavy patterns on the bottom right: I have similar ripples on a testprint of mine i can prove to result from warping. -> what @TheTik said... Try the following: Put your print on a planar surface. Apply a little bit of pressure with your hand from top and at the same time try to slip a sheet of paper between the surface and the bottom layer. On my testprint the paper slips under the print where the ripples are on the top layer.
tobi0892.
tobi0892.OP9mo ago
well it is unfortunately not warping 😦
asperw
asperw3mo ago
Did you ever solve this rippling? I'm getting it bad
tobi0892.
tobi0892.OP3mo ago
No didn’t solve it. You could try a ti titanium tube

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