A 3D-printed enclosure for a circuit board, with a lid that locates

An enclosure is one of the most common things people design for a 3D printer, and one of the most fiddly to get right: the inside has to clear the board, and the lid has to fit without being loose. We asked:

A 3D-printed enclosure for a 60 × 40 × 25 mm circuit board: 2 mm walls, rounded corners, and a lid with a locating lip.

What came out

• The box: 65 × 45 × 27 mm outside, 2 mm walls and R5 corners. Inside it is 61 × 41 mm, so the 60 × 40 board has 0.5 mm of clearance on every side, and the 27 mm height is the 25 mm you gave plus a 2 mm floor.
• The lid: 65 × 45 × 2 mm with a 4 mm locating lip underneath, 1.2 mm wide, sitting 0.25 mm inside the wall: a snug slip fit for printing.
• Two separate parts, box and lid, each with its own features, ready to export as STL.
• An honest warning. Genie pointed out that the lip reaches 4 mm into the box, so a board that really is 25 mm tall would touch the lid. It also said it added no screw posts, standoffs or connector cut-outs.

Why it helps

• Clearances are designed in. The sizes you give are the board’s, and Genie works out the box around them.
• You learn what’s missing before you print. A warning on screen costs nothing; a failed print costs hours.
• Easy to finish. Ask for “four M3 standoffs for the board’s mounting holes” or “a USB-C cut-out on the short side” and Genie adds them to the same box.

Try it: describe the board (or anything that goes inside), the wall thickness, and how the lid should close. Export each part as STL when you’re happy.