Rook (Castle) Chess Piece - Trying out Rotational Arrays
First run at Tinkercad, this made a fun and quick test piece to build basic Tinkercad experience, applied engineering analysis, and 3D visualization skills. Hope you enjoy. More to come.
Middle and High School Technology Instructor in the Great Pacific Northwest!
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/5CGO1msd8sp
I tried to select just the Mini 1, but the selection criteria for this interface forced a Mini 2 to be selected. I just have a Lulzbot Mini.
Overview and Background
If you've gone through the basic Tinkercad tutorial, and your students are ready to try something a little more advanced, make the Tinkercad project pawn chess piece to warm up. Then try this one. It brings in subtractive joining and rotational arrays.
Lesson Plan and Activity
3D Modeling - Rotational Copying / Arrays
Create a base.
Create an object to place on the base and copy it. This can be a column, triangular prism, or rectangular prism, to keep it simple. More complex shapes are even better, but mind your 3D printer's capabilities, please.
Grouped objects in Tinkercad do not need to be connected.
Aligning grouped objects causes alignment about the center of the entire group's bounds (not necessarily center of mass).
Duplicating the pair, and rotating the duplicate. You'll need to know the degrees and the number of objects you'll want to end up with to arrive at an even distribution. 60 degrees on a pair of oppositely located objects duplicated twice gives you an even hexagonal distribution.
Add a top as you like - another chance for placing fun components like small cones or pyramids, or more. Subtracting objects from a cylinder plate maintains your outer curve symmetry.
Add central supports based on the limits of how much your 3D printer can span without supports. You can choose a much smaller portion where the central support meets the bottom plate, but the top portion will most likely need fan out no shallower than 45 degrees and almost touch the outer columns in order to keep from spoiling your print.