The Barrel and Ball Puzzle (Hoffmann)
by ThePuzzleGeek, published
Inspired by the "Barrel and Ball Puzzle" first described in
Professor Hoffmann's "Puzzles Old and New" published by F. Warne (1893).
Pop a marble in the barrel, close it up and pass to a victim to remove.
Print AllParts.stl and add a marble.
This thing uses Karl Maximilian's screw thread library (Thingiverse 31363) place the screwthread script in the same directory.
If the screw thread is too tight/loose adjust the tolerance in the OpenScad script and just generate/print the BarrelEnd part. The thread should be tight enough to prevent the base of the barrel being turned just using finger pressure.
The marble should have a diameter of 15 or 16mm.
The barrel does use quite a bit of material in the upper half to enable the top to be printed - any suggestions on how I could minimise this greatfuly received as I'm new to OpenScad/3D design!