Ellipsograph_ver2 (drawing)

thingiverse

Here's another iteration of an ellipsograph, boasting a broader range of major and minor axes ratios compared to its predecessor. Ranging from approximately 1.41 to 1.77, this revised design required the implementation of smaller screws (6-32 instead of 10-32) to facilitate these enlarged ratios. The reduction in screw size, however, rendered hand-tightening of the nuts unfeasible. To resolve this issue, I introduced a new component and adapted the arm to permit incremental adjustments of the ratio settings. Notably, distinct sides of the arm feature varied cutouts, enabling a wider utilization of the entire spectrum. The pen holder, in contrast, necessitates 10-32 screws and two nuts for its assembly. To construct this ellipsograph as envisioned, you'll require a few tools and materials. A 6-32 tap, a 10-32 tap, along with two 6-32 by 1" screws (about an inch in length), one 6-32 by 0.5" screw, two 10-32 nuts, and two 10-32 screws will be essential for its assembly. The installation of the washer (bushing) proves a bit tricky, as it's difficult to get it to snap over the saw-toothed region. Once secured, though, the movement becomes smoother.