Can you post the STL without the brim?
EDIT: don't bother, I'll just sink it into the buildplate!
Edited by burtoogleKickahaOta 14
Leaving aside the question of "Is this good?" and getting back to the question of "How to make this work?"...
At least on the initial layer, Cura will completely ignore model portions that are too thin relative to the layer height. When I loaded up Cura with this model, my Initial Layer Height happened to be set to 0.27mm, and the brim was skipped by the slicer. When I lowered Initial Layer Height to 0.2mm, the brim was sliced as expected.
So try either slightly increasing your brim's height in the model or slightly lowering your Initial Layer Height.
That sounds like a neat idea. I'll try it out!
I'm attaching the stl without a brim.
Hm, I'm not sure I follow what you mean. What is the problem? The end result in your image would in practice be more or less the same as in my initial stl right?
I tried it out and it worked perfectly for my purposes. I'll probably be using this from now on, thanks a lot!
30 minutes ago, tjarvstrand said:Hm, I'm not sure I follow what you mean. What is the problem? The end result in your image would in practice be more or less the same as in my initial stl right?
Yeah, you're right, the end result is very similar to what you started with. Glad it's working.
I find that with PLA some sharp corners do tend to curl up and adding a skirt that's almost a brim is a great help. My theory being that it's something to do with the temperature gradient on lower layers and having the brim helps keep the temperature uniform across the bottom of the part (this could be complete rubbish but that doesn't stop it being effective ?)
On 5/31/2018 at 7:15 PM, smartavionics said:...
I find that with PLA some sharp corners do tend to curl up and adding a skirt that's almost a brim is a great help. My theory being that it's something to do with the temperature gradient on lower layers and having the brim helps keep the temperature uniform across the bottom of the part (this could be complete rubbish but that doesn't stop it being effective ?)
I guess that might make sense indeed? A theory is as good as it produces results.
I found that the cooling fans do reduce bed temp by 10 to 15°C in the area where they are blowing; measured with an IR-thermometer gun.
So maybe such a brim or wide skirt prevents the glass from cooling down too much and thus improves bonding? And/or maybe it deflects a little bit of the airflow away from the bottom layer? So that the first layer is sitting in the shadow of the wind?
Anyway, I am gonna keep this theory in mind and try it on some of my next models with lots of tiny holes and sharp corners.
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burtoogle 516
I don't know what you are doing wrong but it sliced for me using 0.2mm layers:
However, I wouldn't do this myself as I think it will make a really bad mess to the edge of the part trying to remove that brim.
What I would do is use a wide skirt with a really small gap (say, 0.1mm) so that it looks like brim but only just touches the side of the part. I use this technique for PLA parts that I don't want to warp and don't want to clean up! YMMV
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