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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21 Replies
tobi0892.
tobi0892.OP2w ago
Any ideas? I don’t understand this..
tobi0892.
tobi0892.OP2w 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.OP2w ago
And next time I print the real model I get again the over and underextrusion pattern
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tobi0892.
tobi0892.OP2w 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.OP2w ago
Wasteland 😂
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tobi0892.
tobi0892.OP2w ago
some additional information:
tobi0892.
tobi0892.OP2w ago
my slicer project
tobi0892.
tobi0892.OP2w ago
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tobi0892.
tobi0892.OP2w ago
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tobi0892.
tobi0892.OP7d 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.OP7d ago
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tobi0892.
tobi0892.OP7d ago
Flow is perfect except those areas
tobi0892.
tobi0892.OP6d 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.OP5d ago
One more (bottom right overextension). I am not almost at 8kg wasted PLA 😦
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tobi0892.
tobi0892.OP5d ago
Has anyone an idea?
tobi0892.
tobi0892.OP5d ago
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TheTik
TheTik5d ago
Is that just visual, or is the plastic actually warped much? Like, is this just a cosmetic issue?
tobi0892.
tobi0892.OP4d 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.OP4d ago
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tobi0892.
tobi0892.OP4d ago
From 2 to 10mm z is enough that the top surface is not perfect anymore
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