Expanding Circle

Expanding Circle based on Hoberman sphere.
For those who are interested in the construction:
http://www.snels-design.com/en/main/gallery/expanding_circle

Category:

Science & Technology

Tags:

• hoberman
• expanding
• circle

[tom123bbq]

how do you make sure that is 1 degree of freedom

[dpaddie]

@tom123bbq Bij constructing the parts so that all three of the joints only can move in a line that goes through the center. See my comments in the description of this video

[farferkugelis]

how do you calculate the bend angle of the pieces?

[dpaddie]

@farferkugelis I consctructed the angle of the pieces by drawing the angle of one part in two lines and a centerline. Each part has three points (the joints) that always stay on the two lines and the centerline. That is how I constructed the angles...

[JKTCGMV13]

are all sticks same length?

[dpaddie]

@JKTCGMV13 yep they are all the same length and shape

[veinsandvines]

What did you use for the joints?

[FesterBable]

How is this a circle? Circles don't have straight edges as far as i know.

[JRENTROIA]

Como conseguir esse desenho?

[pmpmpm9]

what tipe of pin do you use to join this parts so they go their respective way?

[pmpmpm9]

can you help me to construct this? when i move one part doesnt move all parts.. what can i do? please

[katsumorymoto]

OMG NOOOO!!!! STOP ITS HYPNOTIZING ME!!!!

[BlueAquaMarina]

Pure magic!! Thank you my dear!!

[tom123bbq]

@dpaddie

thanks.

[tom123bbq]

if all joints are pin-connected they wont move in the same orientation right?

what is the trick to let them move in a similar motion?