Gravitrax Kurven
thingiverse
Update 16.04.2020: I found a track on Youtube that features the curves. I've tested the tracks from "Transmit1" after printing them. Then, some thoughts came to my mind about which curves with what radius and angle would be possible and useful, and whether I could increase the grade (angle of slope). After a while, I found a schematic showing which curves are possible, but not many of them are useful. Nonetheless, I designed a customized curve in my available CAD to switch between curve size, angle, and grade. The four curves I loaded up are the ones that work best for me. There's an image showing the possible curves you can choose from. The ends of the curves are designed slightly stiff so they fit firmly into the plates. This means Curve 1x120, 1x240, and 6x60 can be used without support. However, Curve 2x180 needs some support like shown in the image or it will tip over. All of these curves have an "angle of slope" of about 35 degrees so the marble can go through with some speed. (see Video) Check out my S-Curves on Thingiverse too. Update 04.05.2019: I added two more: 2x60 and 2x120. Update 18.08.2019: all the curves are now available with two "angle of Slopes," 0 and 35 degrees
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