Spinning Kinetic Sculpture RGB/en

Automatic Kinetic Sculpture which creates visual illusions: Moiré pattern.

It does run for more than 30 minutes on a single full winding, isn't it spectacular?

In addition: a fully RGB ambient lighting. The wheels run only with the force of a spring, no motors!

Difficulté

Medium Moyen

Durée

6 hour(s) heure(s)

Catégories

Art, Décoration, Électronique, Énergie, Mobilier, Maison

Coût

50 EUR (€)

kinetic, sculpture, laser, kinétique, illusion, optique, optic, moire, led, arduino, decoration, art, rgb Spinning_Kinetic_Sculpture_RGB_gifprez.gif en fr Creation 1

Introduction

Greeting to you Maker !

Are you curious? Do you like interior decorations that animate and create a beautiful visual show and yet you don't know how to make a Kinetic Sculpture? Then this tutorial is for you :)

If you want to watch what the final result looks like: I made a Youtube Playlist.'

This Spinning Kinetic Sculpture RGB is a sculpture you can fix on a wall or on a support. It is made of 2 main identical wheels that spin in opposite direction, which is creating constructive and destructive visual interferences, it is called the phenomenon of Moiré.

The concept is purely kinetic (spring), it allows the wheels to spin at different and irregular speeds but most importantly to run for a long time (+30minutes). After you rewind the mechanism the wheels start to spin in opposite direction. As soon as the gravity makes the front wheel reverse its spinning direction and pushes some pawls in the system, the 2 wheels are pushed and start to spin again. This is happening until the spring is fully unwinded. If properly optimised and by reducing the friction, it is possible to get a runtime of more than an hour!

I got my inspiration from pre-existing kinetic sculptures, but I decided to make my own design and my own version of the mechanism which is the crucial point of the sculpture.

Until the day, I tried, made, changed and improved my design and finally made a fresh new version by accumulating all my efforts and previous trials. The result is a fully working Kinetic Sculpture that costs almost nothing and more importantly: the size of the mechanism is twice smaller than other documented kinetic sculpture online!

You can also fix it to a support like a mounting base of a screen which will allow you to move it around but a wall will give you a far better looking result.

The center of gravity of the wheel is placed so it acts like a pendulum. The radius of the pendulum plays a major role in the total runtime of the sculpture.

It can look complex on the first sight but if you look more closely at each step you will see that it is fairly easy :). It is also very instructive because you start to understand that every piece plays a major role in the running of the sculpture. You end up with an almost magical piece of art that creates spectacular effects!

You can complete the sculpture with an RGB LED Ring connected to an Arduino, an ON/OFF switch and a battery so it looks even more amazing. Please note that only the LEDs need an electrical source of energy :)

You can choose to not use the LEDs, it's up to you. You're only limited by your own imagination.

Understanding the mechanism doesn't seem easy at first sight but that's exactly why I documented everything and wrote this tutorial with plenty of pictures and videos. What was a pain in the ass for me is going to be very easy for you. Isn't it why Internet exist? :)

CC BY-NC-SA 4.0

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Matériaux

Total cost estimated under 50$. You will need:

• 1x Constant Force Spring A 3X51-20005 or A 3X51-20006 - $18.32 15.50€ PDF & Catalogue

• 5x - 608 Bearings - 3€ Shop Français & Aliexpress

• 4x - 305x305mm Contreplaqué/Acrylic/Plywood 3mm - 7.5€ JR-Contreplaque

• 1x M8 Bolt 60mm with 1 or 2 nut M8

• 3x M5 Bolts 40mm

• 4 Bolts M5 or vis to fix to the wall/support

• 1xVisto fix the spring to the pulley 3mmDiam 10mmLong

• 2x Weights 30grammes

• Embout EarCleanner Spiral

• LED Ring RGB adressable approx 70mm diam - 5€

• Arduino ATTiny -Under 1$

• Battery(+Voltage Regulator) or Wall Adapter + Switch ON/OFF

Outils

Wood Glue, Black & White Spray Paint, Lubricating Oil for the bearing, SuperGlue, Screwdriver, Soldering Iron, Glue Gun, Dremel, Cutting tool, Laser Cutter

Piecesdecoupe.svg

DecoupePart1.svg

DecoupePart2.svg

ShemaKinetic.svg

Étape 1 - Cut the plywood with the laser cutter

Cut the first svg file on 2 sheets of 300cmx300xm

Do the same for the second file

The cutting file is about 300cm by 300cm so if you have a 600x300 you can cut them two by two by merging the files.

Bring together similar pieces so it's easier to work.

Étape 2 - Glue the different pieces

Glue according to the photos

The 2 wheels are the same, just don't forget to align the holes.

Offset Pulley : I/J/J/J

Centered Pulley : D/E/F/F/E/D with the D in the same directions.

Support for the main Bolt: A/A'

Étape 3 - Paint the wheels and the support

I used shiny paint fora better reflection of the light but it's up to you :)

Paint in black the 2 wheels and I' which will block the spring later.

Paint your support in white if you have one.

Étape 4 - Clean and Optimise your bearings

Open you bearing to check if there is any additional grease.

Use some dishwashing liquid and warm water to clean out the grease, we need to replace it with a better one.

Lubricate your bearing with a batter grease like Spray WD40.

You can also spin your bearing with a Dremel one by one, this will spread the oil and optimise the performances.

Si vous avez des roulements avec un joint noir en plastique il est possible de le replacer après nettoyage.

Étape 5 - Place the bearings.

Use a hammer if you can because the diameter of the holes is slightly smaller than those of the bearings.

1 Bearing on each side of the centered pulley

1 bearing in each wheel and 1 in B which is going to be the back support of the back wheel.

Attention la poulie centrale est construite de telle manière qu'on ne pourra pas retirer facilement les roulements.

Étape 6 - Build a support to fix the sculpture

Build a support with more plywood, screws, and a screen stand.

Or, simply drill your wall so you can fix the support A/A' to the wall.

Fix A/A' and don't forget the main M8 Bolt, fix firmly.

Étape 7 - Fix the pawls

The pawl of the back wheel is placed in front of the external pulley. You fix it using a nut but let it rotate freely. Don't forget to cut the bolt just after the final nut.

The other pawl is fixed using half a piece of wood glued to the bolt but not to the pawl(still needs to move freely). Cut the bolt just after the wood part, it needs to be as short as possible because this is mm sensitive.

The pawls need to rotate on their M5 bolt freely until we glue a small piece of wood to the wheel to stop its course. Check the pictures to see.

Étape 8 - Place the Spring and fix the external pulley

Before putting the spring in place it is important to mark the end of the spring with a piece of tape. This will allow us to check when the spring is almost fully winded and stop before it's too late. Check the pictures :)

La poulie excentrée se place sur la roue arrière : Tète de boulon/Roue1 Arrière/Ecrou/I/J/J/J/I'.

Seuls les J sont collés ensemble pour accueillir le ressort. I' est collé au bout du boulon pour empêcher le ressort de sortir de son axe.

Étape 9 - Réaliser le montage Arduino pour controller les LED

Réaliser un montage avec un Arduino ATTiny, une batterie, un switch ON/OFF, un régulateur de tension et un anneau de LED RGB adressable.

Étape 10 - Ajuster et fixer les poids sur les pales

Fixer environ 30 grammes de plomb ou tout autre petit objet métallique lourd sur chaque pale marquée d'un bout de scotch sur les photos.

Sur la roue nous faisant face on peut fixer un peu plus de poids car il n'y a pas le ressort qui pèse sur cette roue. On peut donc compenser en fixant un autre poids plus léger que les autres à l'opposé pour alourdir la roue.

Pour faire des tests je conseille de fixer des poids au bout des pales seulement avec du scotch afin d'ajuster les poids facilement avant d'atteindre le résultat recherché. Cf prochaine étape pour tester les poids

Étape 11 - Aligner les pièces dans l'ordre

Dans l’ordre : Support avec Boulon / Ecrou / Roue 1 / Piece CG / Poulie Centrale / P.CG / roue2 / Ecrou Final ou H

Voir étape suivante pour venir fixer le ressort avant de placer la dernière roue.

Étape 12 - Fixer le ressort à la poulie centrale

Fixer le bout du ressort à l'aide d'une vis de 3mm de diamètre et pas plus de 10mm de long dans l'embout troué du ressort à l'emplacement correspondant sur la poulie centrale.

Cf photo pour voir les pièces du mécanisme entre les roues.

Étape 13 - Observer et se laisser hypnotiser

Pour faire fonctionner : maintenir la roue arrière fermement et faire tourner la roue avant dans le sens des aiguilles d'une montre, quelques tours suffisent, mais faites attention de ne jamais faire plus de 20 tours. En effet, en faisant ça on déroule le ressort de la poulie excentrée sur la poulie centrale, s’il est complétement déroulé il faudra venir le remettre en place à la main en démontant une partie de la sculpture, c'est vraiment pénible donc faites attention.

Étape 14 - Enjoy les chutes de bois parfaites

Les chutes de bois principales ont été personnalisé pour avoir des côtés de même longueur et peuvent donc être fixé les unes aux autres pour créer des formes, les possibilités sont Infini.

Par exemple elles peuvent être arrangées pour former un anneau autour de la sculpture si elle est fixée à un mur.

Étape 15 - Maintenance

Pensez à vérifier régulièrement après plusieurs utilisations que la vis fixant le ressort à la poulie intérieure ne s'échappe pas, revisser si nécessaire.

Changer la pile du montage Arduino lorsque les LED ne s'allument presque plus.

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