Kinetic Cyclic Scissors | Hackaday

So Farrare

[Henry Segerman] and [Kyle VanDeventer] merge math and mechanics to generate a kinetic cyclic scissors sculpture out of 3D printed bars adjoined together with M3 bolts and nuts.

a kinetic bar framework with 3d printed bars of alternative black and grey color, each joined with m3 bolts and nuts being held by a person at two points with a quadrilateral tiling overlay

The kinetic sculpture can be believed of as a part of an infinite tiling of self related quadrilaterals in the plane. The tiling of the aircraft by these self identical quadrilaterals can be understood as a framework by joining the diagonal details of each individual quadrilateral with bars. The standard problem [Henry] and [Kyle] wanted to reply was underneath what conditions can the recognized bar framework of a subsection of the tiling be made to shift. Amazingly, when the quadrilateral is a parallelogram, like in a forklift, or “cyclic”, when the endpoints lie on a circle, the bar framework can move. Tweaking the ratios of the center lengths in a cyclic configuration qualified prospects to unique sorts of rotational symmetry that can be accomplished as the composition folds in on by itself.

[Henry] and [Kyle] go into more detail in their Bridges Meeting paper, with derivations and even more conversations about the symmetry induced by changing the constraints. The details are light-weight on the real kinetic sculpture highlighted in the online video but the bar framework was chosen to have a mirror form of symmetry with a motor hooked up to one of the central, reduce bars to travel the motion of the sculpture.

The bar framework is accessible for down load for any person seeking to 3D print or laser lower their individual. Bar frameworks are useful tips and we have noticed them utilized in artwork sculptures to strandbeests, so it’s terrific to see further explorations in this room.

Online video after the crack!

https://www.youtube.com/view?v=76XIrm91Ra0

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