This is a set of modular marble track pieces that work well with 3/8" bearings (or other similar, small marbles.) By default, the track "unit" is 20x20x20mm; the open pieces of track are half-height, and the drops are double height. Print it out and use it (like I have) to avoid whatever important work you're supposed to be doing.
I've included:
the OpenSCAD file (which is parametric, but definitely has some bugs),
two track set STL files (which are about 160x160, so should print on an i3)
individual STL files for each piece in the standard sets
an 8mm marble (which probably needs a raft/brim, and may not be heavy enough)
Printer:
CTC i3
Rafts:
No
Supports:
No
Resolution:
.3mm
Infill:
20%
Notes:
Prints well at 40mm/s and .3mm layer height on my cheap i3 clone. The pieces have (by default) .25mm of extra lateral room at the connectors; if your printer is nicer than mine, you might need to change this in the OpenSCAD file and re-generate the pieces / track sets.
