Constant Acceleration "Spinner" Lab Materials

This is a 3D printed version of the "Spinner Lab" from the Modeling Physics Curriculum. This works great for collecting position vs. time data for an object that is accelerating constantly. In this case, the Spinner, accelerates down two metal poles (1/2 EMT conduit) that are propped up by a textbook on one end.

To make the Spinner, print one copy of the disk and two copies of the "T"s. The Tees are called that because the original version of this spinner was made by cutting a disc out of plywood and then glueing a golf tee to either side. The taper of the golf tees acts like a train wheel and corrects the motion of the disc so that it stays in the middle of the track.

I print these materials out of PLA at around 15-20% infill.
The Tees are designed to be a tight press fit into the disk. However, if you print them at 100% size, they likely won't fit into the holes. I print them at about 98% of their designed size (just re-size them to 98% when slicing). You should print