Hoberman Scissor Kit

Reference: K’nex toy kit




Inspiration) Pentograph:

drawing m 1

Potential angles and curvatures:

week 11 codeing hoberman

Proposal Sketch:






Based on an octagon and  hex-decagon.


1) Derive the angle of the hoberman scissors based on the octagon, later on the hexdecagon.

Screen Shot 2015-05-12 at 10.45.32 AMScreen Shot 2015-05-13 at 11.07.57 AM

Script) fro octagon and hexdecagon

octagon hobermanhexdecagon script


2) bring in the 3d obj in to rhino, and fallow the following steps

Screen Shot 2015-05-12 at 5.39.51 PM


3) place the scissor in space and make a board large enough that can fit all three angles. You have to test it when it is  at a maximum open condition.

Screen Shot 2015-05-12 at 5.49.30 PM


4) when assembling all the parts you have to take in to account thicknesses and sectional levels in order for the geometry to be as frictionless as possible while keeping its movement on the same plane. In other words you want to keep objects in their original sectional plane. This will also allow for the pens to flow smoothly and have complete lines.

5) Components: 3 different arms.

1 based on an octagon (orange)

1 based on hexdecagon (pink)

1 half octagon half hexdecagon (orange and pink)

1 drawing board with 3 different configurations.


6) different configurations:

FullSizeRender_1 FullSizeRender_2  FullSizeRender_4 FullSizeRender_3

FullSizeRender FullSizeRender_1   FullSizeRender_4 FullSizeRender_3FullSizeRender_2


7)Final Drawings:

FullSizeRender_4 FullSizeRender_2



The final outcome are two very similar drawings at first, but if you are to analyze them more closely they have essential differences. The drawing that has three different colors (first Drawing) gives the impression of  different radius arcs. What is really happening is that these pen marks are not really making circle based arcs but rather the curvature is not completely true to a circle. The reason is because this drawing was made with the Hoberman arm that had a pair of octagonal scissors mixed with a pair of hex-decagonal scissors. Meaning that the arc is actually a small chunk of a spiral.

On the other hand the second drawing is based on a regular Hoberman scissor. Where all the arcs are circle based. The thinner larger arcs are the marks made by the change in angle (there are 3 different angles). The other marks are the marks made by the opening and closing of the arm. I wanted to have a different effect than the first drawing so I chose to accentuate the thinner marks and show all the different circles that are invisible yet embedded in the drawing machine.