How to make Cura overfill rather than underfill?

[JohnnyTa 0]

Hi,

 

I'm working with a model with very sharp edges, and would like to keep them. Currently, I'm planning on printing it and then sanding it down to the correct dimensions once it has finished printing.

 

Is there a setting which would allow me to make it so the print necessarily overfills the whole model, instead of it only doing what the nozzle has the resolution to do?  

-- This is an image of the model, the grey part is what isn't printing, and I need to print.

[Slashee_the_Cow 619]

You might need to make all settings visible (or just search for it), but you want to set Experimental > Slicing Tolerance to Inclusive. This will make Cura's calculations always round up so that the end result is at least as big as the original model.

(If that works, you can stop reading here)

 

If that doesn't work (and it should work in theory, but with computers "in theory" and "what really happens" have no guarantee of being the same thing), I'm guessing by the screenshot that the grey part comes to a sharp point? Obviously 3D printers aren't good at doing them since you can't print infinitely thin, but you can also try adjusting Walls > Minimum Feature Size to a really small number (I usually run with it set at 0.1mm, but if you're going really thin you could try something like 0.001mm) and Walls > Minimum Thin Wall Line Width to about half your nozzle size (most printers come with a 0.4mm nozzle stock, so most likely 0.2mm). That would that for any feature larger than 0.001mm it prints it using a 0.2mm line - not a great idea most of the line (you don't want to be printing lines way thicker than the tiny details they'd try to represent) but if you want to try and fill an area it might help.