Also known as Do-nothing machine, bull-shit grinder or ellipsograph. http://en.wikipedia.org/wiki/Trammel_of_Archimedes
This unit works pretty well but you may need to adjust the tightness of the screw to get the best motion...not too tight or loose...just right!
Assembled with five #4 3/4" pan head screws.
I think this is the last variant I will make...took me quite a while to get the design right and to get the motion to work correctly.
Time to move on to other things!
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