District Coach on the Go
06 Aug 2015 Leave a comment
in 3D Printing, math Tags: gears
SO here is the information for making 3D gears that all fit together. I used Sketchup for the design. All the gear convexities and concavities are 3-inch half-circles.
6-Spoke Gear
12-sided circle
6-inch radius (12-inch diameter)
Rotated 7.5 degrees
12-Spoke Gear
24-sided circle
12-inch radius (24-inch diameter)
Rotated 15 degrees
24-Spoke Gear
48-sided circle
24-inch radius (48-inch diameter)
Rotated 3.75 degrees
Rectangular 14-Spoke Gear
12- by 24-inch rectangle
6-inch radius circles at ends
04 Aug 2015 Leave a comment
in 3D Printing, math Tags: gears, Sketchup, Spirograph
After having discussions with my math peeps, I decided to make gears. From scratch, in Sketchup. Many failures ensued. Thankfully, a Youtube video showed me the light (granted, I had to watch the video about 20 times).
Anyway, the gear ratio works (don’t ask me what that means), and different sizes of gears spin with each other. I even got fancy with irregular shapes (see the long gear) as well as gears with cut-outs (to save filament) and a gear with holes (to create abstract designs a la Spirograph).
Occasional Observations of Traveling Technology Coach 