Rolling Ball Clock

NOTE: All known bugs have been fixed in this release. If you downloaded a previous version, please download this new copy and refer to the updated assembly guide. SP17: Rolling Ball Clock is my largest and most exciting clock. It is powered entirely using 3/4" (19mm) steel balls. Runtime is 1.6 to 2.4 days with an accuracy of 1-2 minutes per week. A manual winding mechanism lifts the balls back to the top. The overall size is 9.15x10.75x33.5" (23x27x85cm). It prints in around 120 hours on a Sna…

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