Wall thickness not integer extrusion widths
Hello
I am pretty sure this problem has been discussed elsewhere, but I can't find it.
I try to print a sleeve, a short thin wall pipe. The thickness is 1 mm and has to be to fit other things, ca 90 mm diameter and a height of ca 30 mm. My nozzle is 0.4 mm and all my prints so far end up being two wall layers that does not stick together. The sleeve gets very floppy. I need the walls to stick together.
So far i have switched on "thin walls" option. Changed extrusion width from 0.42 mm (or what the default was) to 0.55. These changes did not help. I have increased flow to 105 %, very slight improvement, not good enough. I am printing PETG at 260 degrees which has worked well on other prints without the wall issue. Fan at 20%, earler tries with Cura and no fan gave same problems. My printer is a Creality Ender-3.
How should I get better inter wall layer bonding? Should I get infill between the walls? What settings would make that happen? Right now infill is set to 15% but the slicer don't put any infill in the path.
Thanks
/Daniel
RE: Wall thickness not integer extrusion widths
You may want to upload the zipped 3mf project files because that contains all your settings so we can make suggestions on how to improve them. A 1 mm wall thickness shouldn't cause the problems you're seeing.
RE: Wall thickness not integer extrusion widths
Hello again, here is zipped 3mf file
Thanks
/Daniel
RE: Wall thickness not integer extrusion widths
Hi Daniel,
looking at the .3mf file for the ring,
the lower edge of the ring is tapered, and slicer is unable to slice the lower edges successfully
you could resolve this by trimming the lower section off the model say 0.4mm
the two perimeters are a bit of an issue, caused by Arachne slicer, if you change to Classic sliver, you will get a thin infill trace as well
the top of your model is also tapered, so the top edge may not be sliced.
you can restore the original height by scaling the Z height whilst not scaling X and Y (Small lock symbol in the right hand window, next to the scaling windows)
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Wall thickness not integer extrusion widths
Hi
Let me start by saying that I am impressed by the response. Quality suggestions rapidly. Thank you.
I tried switching to classic, from Arachne, in "perimeter generator"-settings and printed again. Still the printhead takes only two circular loops per layer and still no bonding between wall layers. Should I set extrusion width back to 0.42?
Thanks
/Daniel
RE: Wall thickness not integer extrusion widths
0.45 should be ok
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Wall thickness not integer extrusion widths
Success!
I switched from Arachne to Classic and set extrusion widths back to defaults, (0.44 mm I think).
Now I got two slower paths and one quick per layer and good bonding.
Surface finish was slightly lumpy, any suggestions on how to avoid that?
Thanks a lot for the help
/Daniel
RE: Wall thickness not integer extrusion widths
Hi Daniel
if the top surface is a bit lumpy, you could try reducing the flow percentage,
Prusa normally sets this at 95%, so try 90% and see if it improves
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Wall thickness not integer extrusion widths
It ia not the top surface. It is some layers in the middle. It is nice and smooth for some 6-8 mm and then a lumpy layer, repeat
RE: Wall thickness not integer extrusion widths
Do you have pictures?
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK