Meridiana

Mark solar noon and the season with a sun spot

A cathedral meridian line in miniature for a sunny windowsill. Turn the tall wall due south: at solar noon its pinhole throws a spot of sunlight onto the floor rib, and where the spot lands on the engraved marks tells the season, from the high June sun near the wall to the low autumn sun at the back.

Customize this model

Size: 70 × 220 × 90 mm
Shape: Rectangular
Walls: 3.0 mm
Volume: 35.1 cm³
Est. weight (PLA): 43.5 g
Parts to print: 1
Category: Science & education
Made by: Krypto
Built in: 52 steps

What’s in it

Rectangular, 70 × 220 × 90 mm, with 3.0 mm walls
1 divider
1 hole in the walls
Engraved text: “JUN”, “MAR SEP”, “OCT FEB”, “SOUTH”

How to print it

Matt light filament shows the spot best. Marks set for about 51 degrees north.

Prints as shown on its floor, no supports.

Filament: at most about 43.5 g of PLA printed solid (roughly $0.87 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the meridiana model?

The meridiana model measures 70 × 220 × 90 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Matt light filament shows the spot best. Marks set for about 51 degrees north. Prints as shown on its floor, no supports.

How much filament does it use?

At most about 43.5 g of PLA (35.1 cm³ printed solid), roughly $0.87 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.