Hello, I have a fairly general question, but need some insights/experience:

How can I determine the optimal tolerances for 3D printed parts to ensure they fit perfectly in a three-piece case assembly? I’m considering using FDM or SLS technologies for the case and need to account for possible post-processing (e.g. painting) and material shrinkage. The case will be used for an electronic device, so precision and durability are crucial. This is a custom device that will not go into mass production, so injection molding is not efficient for a production of max. 50-70 pieces per year.

Specific guidelines or rules of thumb for these technologies would be very helpful, especially to achieve a tight fit and structural integrity.

Thanks!

Stefan