21 minutes ago, gr5 said:I think you will find that those 3 walls print faster than anything else
Well, it's more than just 3 walls... As I wrote, it's 3mm worth of wall lines (actually: 3.2mm - I had simplified that in my previous post), i.e. at 0.4 mm line width, that's 8 wall lines, where I was hoping to somehow get away with only 2 (i.e. 0.8mm wall thickness)...
The difference between the Cura estimates for print time between the model with hollowed out middle and the one without (both using 25% infill) was actually zero in one of the test slices I did. Seems the slower print speed of the additional walls completely negated the gain of doing less infill... And all that while using up even more material...
FYI: The "air shaft" at the center of my model is actually more TicTac-shaped (or should I say "minion-shaped" 😉 ). and has an inner diameter of 3cm and a height of ~6cm.
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gr5 2,224
I think you will find that those 3 walls print faster than anything else. Faster than infill, etc. Going from 2 to 4 walls may increase print time by 10%. Going from 20% infill to 10% infill may cut print time almost in half. Maybe those 3 walls aren't a problem around the inner air shaft.
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