I have made about 5 versions of this with varying wall thicknesses (Tinkercad). When I bring them into Bambu Slicer I often get many of the walls not printing. I finally got it to go by using the “Detect Thin Walls” setting with the Arachne option.
What I cannot wrap my mind around is where is the sweet spot. If I make incrementally smaller changes to the thickness of the walls it does not seem to make any real difference in what prints. Then I hit some point where the walls are thick enough that I don’t need the “Detect Thin Walls” option and then the walls are too thick.
Unfortunately I didn’t carefully track my wall thicknesses so I don’t have numbers to compare. I am hoping someone can explain to me what the thinnest wall thickness I can have is without needing the thin walls option or making my printers mind explode… I am using PLA on a P1S with the default 4mm nozzle.
Please forgive me if this is a nube question but I am totally new to 3D printing.
Detect thin walls will use a single wall to construct where two walls wont fit.
The quality tab contains the line widths, by default its between 0.42mm and 0.5mm.
So, if we just go with 0.5mm lines estimation we need a 1mm thick wall to not trigger ‘thin walls’.
I’m going to guess that somehow you have constructed a solid that is hollow inside based on your description coupled with the drawing. Those seem like thicker than 1mm if they are intended to be solid, which they probably should be in which case your settings ‘number of walls’ and ‘infill percent’ will determine the density of the final print.
Am I understanding you right that the slicer basically expects everything to consist of 2 walls and when its a thinner line than where two walls can fit it will have trouble?
If that is the case and I make a wall under 1mm thick I guess that algorithm just makes a guess at how to print it? I ask because I kept walking it up in small increments (all under 1mm) and it didnt seem to make the wall any thicker. I then just made the jump to 3mm (in the pic) to see it print right.
I’m not sure if it helps your specific project, but yuo can push a 0.4mm nozzle way above the “norm”.
For example, under certain models, I run my 0.4mm nozzle at 0.9mm line width. with archane settings, you can go as thin a 0.32mm before the walls become unacceptably thin (for this, you need to make sure your flow calibration is dialed in VERY precisely, any variance will magnify when printing such thick (or thin) walls…
Most designers use 0.5 as the ‘standard’ for a single wall thickness, as 0.4 can handle this on any printer, but as I said, you can shove more than double-that through without loss of quality.
It shouldn’t have too much trouble when using arachne. Post a screenshot of the sliced view cross-section might help to understand what might be going on.
Based on what you said you stayed under 1mm, so you might have triggered the thin wall due to that, then just jumped to 3mm when 1.2mm would probably be fine, but depending on the stiffness you want for that part that still seems thin.
Thanks - I think I am getting the idea. It never occurred to me I could push more than a .04 mm line through a .04mm nozzle. I think I will go make myself a test project and print a bunch of thin to tick lines while tinkering with these settings.
