by emmett, published
Hopefully the video makes assembly pretty clear. I always recommend greasing the pins to keep it turning smoothly without squeaking. I use white lithium grease, but anything that doesn't melt plastic should work.
The heart plates are named by their gear ratio, so 1-2 is 1 : 2, etc. 1-2 has a period of one revolution, while 2-3 is two and 5-6 takes five revolutions, so don't give up. If you need the parts separately, many free mesh editors and slicers can separate plated parts. Or you can export them from the OpenSCAD script.
