4 ms·
That's awesome! I've never built a physical one, I think it's beyond my skill. Sounds like a fun project though.
by ericyd 3y ago
That's awesome! I've never built a physical one, I think it's beyond my skill. Sounds like a fun project though.
- JKCalhoun 3y agoThe one I built was not unlike this one: https://chestofbooks.com/crafts/popular-mechanics/Things-To-Make/images/Simple-Rectilinear-Harmonograph.jpg https://chestofbooks.com/crafts/popular-mechanics/Things-To-... Not too difficult to build. Two holes in a horizontal board - drop dowels into each one to act as pendulums. The pivot mechanism for each pendulum was one of those trapezoidal box cutter blades. (In the above illustration I suspect they are nails protruding through a cross-piece.) Weights are anything you can find. As long as you can move them up and down the dowels to change the period of the pendulums. A clipboard screwed and glued to the end of one pendulum. The other pendulum has a hinge with the arm holding a pen.