Do you remember playing with the Spirograph as a kid? You know, the funny gear cogs you used with a pen to create endless drawings of mesmerizing quality?
Well this pretty little bot accomplishes virtually the same thing, and it's really not that hard to build. If you are a Lego fan of any variety, you will probably have all the pieces you need. The one exception may be the electric motor (Power Functions) and the "Turntable" which are slightly more rare parts.
> Entertainment (both building and watching!)
> Decoration (hand-made cards, wall decor, etc
Step 1: What You Will Need
Step 2: Base Structure
Step 3: Gear-Down Motor Module
Step 4: Primary Gear Box
Step 5: Artistic Arms
Step 6: Paper Platform
Step 7: Assemble Modules
Step 8: Spiro, Go! (And Other Ideas)
Remove the cap from your pen, place it on the page, and start your engines!
Watch it work, and soon you will have a beautiful art piece to use as you please.
> You can change what gears you use to change the speed of the arms and base, and thus you will alter the shape of your spirographic drawing. If the arms move faster, there will be more circles drawn closer together as the base spins the same.
> You can change the size of the circles drawn by the arms by moving the point of rotation further from the axis.
Step 9: Pantograph Modification
The Spirographer can be modified to create more interesting designs using a pantograph for arms.
Note, I also switched the technic gears inside the gear box so the 2 axis rotate opposite directions.
Video coming soon!