I'm sure this is a super dumb question, but I just don't know the right terminology to google my answer.
So I've made a case for a product with a battery cover that clicks in with some clips.
I want to 3D print both the case and the cover, but some random dude in a Youtube video mentioned that a classic rookie mistake is to make them the exact same dimension, which will produce a really tight fit, or no fit at all.
But I can't find out how to avoid this problem.
So far I've tried to manually make my cover 0.5mm smaller (no idea of this is a reasonable number), but that gets really nasty around all the clips to make their alignment and size correct, because now I have to "spread" this difference along the edges of the cover.
So I gave up on that, as I simply could not get it right, and things kept clipping or have too much space.
I found some videos on tolerances, which is more about variance than the tightness of the fit.
What I want is basically design my cover to the exact dimensions and then apply some "inset" to make it fit smoothly.
This is such a common thing that I'm sure there are smarter ways to do it than manually adjusting all your dimensions by small fractions of a millimeter.
Welcome to the forum. This isn't something I do very often, but one option might be to create a second configuration of your Part and use the "Move face" command to enlarge the Part on each side by the desired value (suppress this feature in the original configuration). Be sure to select each exterior face when using the feature.
Someone else will likely have a better idea, but if not this might be worth trying.