1 1/4" x 2" Clevis Pin
1 5/16" x 1/2" set screw
1 5/16" tap
1+ standard Sharpie markers
sharpie holder.stl (34.6 KB)
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If we offset the sharpie a little bit and then turn on the spindle - it would make it like a SpiroGraph - Don’t do this!!
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ooh, the images that just popped into my head!
@ 16k rpm woot woot! 
i like that idea SpiroGraph
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Get a spindle that will turn slowly enough and this would be a cool idea!
Replace spindle with stepper motor could allow for some creative paths to emerge. Run random Z-motion with a base X/Y shape of some kind…
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