Two parts from my model, work in progress:
parts.3dm (2.0 MB)
The cover (orange) slides into the rails. I am designing for FDM 3D printing in ABS plastics with desktop devices such as a MakerBot or an Ultimaker. As the manufacturing process is not infinitely precise, I would like to add some clearance to the rails, a tiny gap of 0.1 mm. For one of the rails, I have started doing that manually, reconstructing the rail with an offset, then applying chamfer. It was a tedious process. If I later find out that 0.1 mm was not a good choice, then I have to reconstruct the rails again: Oh no! And it’s not just the rails: The entire model currently consists of eight parts that need to fit each other.
What is a good workflow for adding clearance to mechanical designs?
I am even considering sanding down manually after printing. It could be quicker than doing it beforehand in Rhino.