Hello!
About creating holes on components, how much larger does the hole have to be than the pegs? For reference, the pegs are circular cylinders with height of 10 mm and diameter of 10 mm.
Just a bit of a background - I am currently creating a model for my wind tunnel experiment. Since my model is to large for our 3D Printer, I need to divide it by parts and connect it piece-by-piece.
Thanks for your time!
It depends on your printer. I’d start with a gap of 0.2 mm.
You can also stick with the precise dimensions and use a drill to make the holes inner diameter exactly 10 mm.
That will depend a lot on your material, process and desired fit.
Back in the day when I did a lot of machining of composite modeling block plastic parts, I used drill holes the same size as metal pins - due to the elasticity of the plastic, they went in with a nice snug fit. 0.1mm larger and they would be too loose and fall out.
Metal to metal has a whole class of fits that are well defined and that include not only size, but also surface finish.
As I assume you’re talking about 3D printed parts, again that will depend on the precision of your printer, the material used and to some degree the orientation of the holes relative to the printer layers. As @martinsiegrist said, 0.2mm is a good starting point, even better may be to make them slightly smaller and drill them out to size. I think it’s always worth it to make a small test piece first to check fits.
On thingiverse there is a tolerance test model. With this print you are kind of able to find out how big are the tolerances of your printer, material and also slicing settings are.
If you are using Cura you can also play with the slicing tolerance settings (under experimental)