Esferovite CNC! E aprendam Moldes, Facturar com 3D, uma Prusa SLA, e gravar a Laser com uma Prusa!

Isto é muito importante!

Já imaginaram, podem construír uma Impressora 3D, MAS, com uma armação em BARRAS MACIÇAS?

E tudo o resto que possam imaginar, porque é só verter Sucata de Alumínio derretida, para peças sacrificáveis em Esferovite/Isopor...

E já está!

A note: This, and Lost Mold Aluminum Casting, will make great solid Projects, as in, solid frame 3D Printers, for example...

4-Axis CNC Hot-wire Foam Cutter (Arduino+Ramps1.4)

rahulsrajan

A CNC Hot-wire cutter is an awesome tool to have when you are building aeroplanes out of foam. It allows the ability to cut out any aerofoil shape from a CAD design accurately. A properly configured machine can save you a lot of effort and produce a smooth finish.
The machine has a Nichrome wire stretched between two towers. The wire is heated by passing current through it and the towers move relative to each other to define the shape of the cut. The 2D CAD design to be cut out is turned into G-code and fed to the machine, which moves in four independent axes to create complex contours like tapered wings.
The motion of each axis can be achieved by any means such as linear bearings on smooth rods or by using drawer slides of various sizes. Each axis is driven by a stepper motor through a Leadscrew, a GT2 belt and pulley can also be used depending on the size of the machine. The cutting forces involved is minimal and the construction only needs to be rigid enough to withstand the tension of the wire stretched between the towers.

https://www.instructables.com/id/4-Axis-CNC-Hot-wire-Foam-Cutter-ArduinoRamps14/

Nem de propósito, aprendam aqui como fazer Moldes, nem que seja para técnicas menos radicais que a Fundição! LOL

MOLD MAKING & CASTING CLASS

Paige Russell

Welcome to the infinite world of Mold Making & Casting!
In this class, you'll learn how to make easy molds that will allow you to cast multiples of virtually any object – including 3D prints – in a variety of materials, like soap, plaster, chocolate, crayon, resin, metal, and more!
In this introductory class, you’ll gain a solid understanding of fundamental techniques that will empower you to tackle almost any mold making project.
You'll learn what undercuts are and how to recognize them on your models, determine what kind of mold and mold material to use, how to build and properly seal mold walls, and how to cast in numerous materials.
It may seem daunting, but I’m a product designer and ceramicist who has been making molds for over 15 years, and I'll be with you every step of the way. I look forward to teaching you how to cast your way to a customized world!

https://www.instructables.com/class/Mold-Making-Casting-Class/

...Uns bons duns conselhos que eu devia ter ouvido antes, é o que este Bacano, Angus, da Maker's Muse vos dá, e aprendam, que podem assim fazer uns cobres com a vossa Impressora 3D...

3D Print on Demand for Profit (Without 3DHubs!)

In this video I'll share my experiences in running a successful, profitable business around 3D Printing on demand, without using 3DHubs and similar style websites. NOTE! This video contains my opinion and experiences on this subject and is not legal or business advice. You are responsible for your own business decisions!

https://www.youtube.com/watch?v=PceI1AtgFvo

O grande Prusa, mais a sua Equipe, oferecem-nos esta pequena maravilha, agora, uma Impressora SLA Open Source, e com a Qualidade prusa!

É bom...

Introducing Original Prusa SL1 - Open-source SLA 3D printer by Josef Prusa
Prusa 3D by Josef Prusa

Introducing Original Prusa SL1 3D printer, which is based on the MSLA printing process. It uses a high-resolution LCD panel and a UV LED to cure thin layers of resin to achieve an unprecedented level of detail.

https://www.youtube.com/watch?v=rZXmtCFBtXg

Falando de Prusas, podem também GRAVAR, e quem sabe, cortar por Laser CNC, com umas adaptações...

O que vos aumenta as capacidades da vossa Oficina!

Laser Engraving on Your Prusa MK3

marzsolt 

Yes, your 3D printer is totally capable of making awesome laser engravings. Follow along to see how I did it. Hint: it's not complicated (well, probably just a manageable amount), and I created tools to make it easy for beginners and advanced skill levels to jump in and laser away.
There are many steps and I included a lot of details. I want to be sure you understand why and how things are happening.
Disclaimer: Lasers are very dangerous, so you need to use proper care and basic common sense to not get in trouble. I warned you, I will not be responsible if you shoot down a space pirate... or lose an eye. Arrr.

https://www.instructables.com/id/Laser-Engraving-on-Your-Prusa-MK3/

Uma Máquina duma peça só! E uma máquina de jogos de garra, um Catamaran de Espuma de Nylon, um Quadracóptero de PVC, e o Sketchup paramétrico.

Como já referi antes, sobre Fixtures, a Ponoko oferece-nos esta dica, da Revista dezeen, aqui, chamam-lhes Metamateriais, mas parece-me a mesma coisa.

De qqualquer maneira, cá vai esta notícia sobre máquinas de uma peça só:

Metamaterials make it possible to create mechanisms from a single piece of plastic 

A door latch and a pair of pliers are among the mechanisms created without screws, bolts or other fixings by researchers working with a new technology called metamaterials (+ movie).

The team at the Hasso Plattner Institute's Human Computer Interaction Lab design objects that move despite being 3D printed as one single part.

To do this they use metamaterials – a type of engineered material defined by its internal structure rather than what substance it is made of. Metamaterials have properties not found in nature, as with the real-life "invisibility cloak".

The objects created can have controlled directional movement, which means they can perform set mechanical functions, like gripping something or latching a door. 

http://www.dezeen.com/2016/09/27/metamaterials-mechanisms-design-3d-printed-plastic-door-handle-hasso-plattner-institute-technology/

Uma ideia para se fazer em casa, que chama mesmo as atenções, é esta Máquina de Jogos digna dalguma Feira, é algo divertidíssimo de construír, e com sucesso certo:

HOMEMADE CLAW MACHINE

-MMM- in technologyrobots 

This is the second and new Version of my Claw Machine (Old Version)

As I announced in my first Version, the "new" Machine will be painted and setted up with an Arduino. 

http://www.instructables.com/id/HOMEMADE-CLAW-MACHINE/

E para uns Fins-de-Semana inesquecíveis, gastando pouco, que tal um Catamaran, feito com Espuma de Poliestereno, sim, Esferovite, ou Isopor, conforme o País, ora aqui está algo de fenomenal, e acessível à brava!

DIY styrofoam catamaran by Joshbuilds

outsideboats 

This is a Styrofoam catamaran i built. I had been wanting to build this for a while, then in the last few days of summer i decided to build it. This only took 2 full days to build and one day to test. The catamaran costed me around 200 dollars (sail not included) and this is comparable to a store bought catamaran which would cost 2000 dollars

In this instructable i have included a few schematics (located on the last page), a materials list, and various pictures and descriptions for all steps. 

http://www.instructables.com/id/DIY-Styrofoam-Catamaran/

E falando de coisas bacanas e acessíveis, vai aqui mais um belo dum Instructable, este, sobre como fazerem um Quadracóptero, com PVC, barato, e resistente, para se aprender a voar um Quadra, sem medos... 

The Ultimate PVC Quadcopter by thomasjarrett16

technologygadgets 

Whether you're a beginner looking for a quadcopter to help you get your feet wet in scratch building, or you're a little more experienced and are just searching for a cheap and reliable frame, look no further than The Ultimate PVC Quadcopter! This is a 450mm frame that is extremely cheap, at around $12 for all the hardware, and is extremely durable as well, mine withstanding dozens of near full speed crashes with nothing more than a couple of broken propellers! The electronics are 100% protected, either inside the PVC arms or underneath the lexan canopy, meaning 1: you'll never have to replace any electronic components and 2: you'll have the flyest (no pun intended :) ) looking DIY quadcopter around! This instructable is going to show you the creation process of this quadcopter and how to make it yourself! 

http://www.instructables.com/id/The-Ultimate-PVC-Quadcopter/

Dica da Sketchucation, se têem o Sketchup, isto é algo a juntar-lhe, para não perderem a paciência, após terem perdido uma hora de trabalho, por não terem gravado tudo, de 5 em 5 minutos...

Porque a história toda do que fizerem, está guardada, e podem voltar atrás, quando cometerem um erro, à vontade...

E podem usar um Modelo, para muitos usos, ou derivações, apenas mudando uns parâmetros, num Slider!

VIZ – Parametric Modeling for SketchUp 

Viz adds parametric modeling to SketchUp. All your modeling history is retained, you won’t need to redo all the work anymore. Often updating your complex model will turn out to be a matter of tweaking a couple of sliders.

Parametric Modeling

Boolean Operations and Constructive Solid Geometry

SketchUp 2014/2015/2016 Windows and SketchUp 2015/2016 Mac 

http://www.fluidinteractive.com/products/sketchup-extensions/viz/

Maker's Marks! E Ímanes na Educação, um Planador espectacular, e o Crumblebot

Isto é mais um sonho tornado realidade...
Dica do nosso amigo Eddy Ridder: 

Moldem o que quizerem, ponham-lhe umas Etiquetas auto-colantes, ondue querem os componentes, e o scanner e o programa fazem o resto...

Um Objecto 3D, com a caixa já feita e a caixa já com tudo preparado para os Componentes!

Depois, é só imprimir em 3D, e montar!
Muito bom!

Makers' Marks: Physical Markup for Designing and Fabricating Functional Objects
Berkeley Institute of Design

To fabricate functional objects, designers create assemblies combining existing parts (e.g., mechanical hinges, electronic components) with custom-designed geometry (e.g., enclosures). Modeling complex assemblies is outside the reach of the growing number of novice “makers” with access to digital fabrication tools. We aim to allow makers to design and 3D print functional mechanical and electronic assemblies. Based on a formative exploration, we created Makers’ Marks, a system based on physically authoring assemblies with sculpting materials and annotation stickers. Makers physically sculpt the shape of an object and attach stickers to place existing parts or high-level features (such as parting lines). Our tool extracts the 3D pose of these annotations from a scan of the design, then synthesizes the geometry needed to support integrating desired parts using a library of clearance and mount- ing constraints. The resulting designs can then be easily 3D printed and assembled.

https://www.youtube.com/watch?v=EM7bgipWy6g

Aqui está uma boa maneira de usarem os ímanes de neodimio, em Aulas divertidas sobre o Tema do Magnetismo, para a criançada:

Magnets in Education

A few of us here at K&J Magnetics recently had the opportunity to present magnetic topics in the classroom.  One has a daughter in elementary school working on her first exposure to magnetism and electronic circuits in science class.  Another had an invitation from a friend who's a teacher.  It was a huge amount of fun playing show-and-tell with magnets to excited kids!

We've known that magnets are fun for years.  If there's one thing we learned in our recent school visits, it's that magnets in a classroom setting can be seriously engaging.  Adding interactive and hands-on stuff to science class really gets students involved and excited.

This article provides a brief description for the many magnetic demonstrations we presented.  Regular readers of the K&J blog might recognize a number of demos from earlier articles.  We thought listing them all together here might help answer some common questions we receive:

What kind of science experiments can I do with magnets?

My kid wants to use magnets in their science fair / project. What should they use?

What magnets are good for the classroom?

For some of these ideas, we use some fairly powerful magnets for good effect.  Please use magnets carefully and responsibly.  Some of these experiments are best conducted with adult supervision. 

http://www.kjmagnetics.com/blog.asp?p=educational&utm_source=K%26J+Magnetics+Newsletter&utm_campaign=c2b00c6bdd-2015_11_November_Newsletter

Para quem se queira deliciar com a Maravilha que é o Voo, só é de aplaudir este magnífico esforço de Alexander Shevchenko, ao combinar, de forma genial, a Economia do voo de Asa Delta, com a Rigidez de Planadores mais seguros, usando a bem económica Esferovite, ou Isopor, mas Laminada, de forma a garantir muito mais segurança a um preço que é mesmo para qualquer um.
E também se poupa na Manutenção! 
Parabéns! 

This Glider Design by Alexander Shevchenko Costs Less to RepairJen Chae Ukrainian designer Alexander Shevchenko’s Delta glider design keeps the frugal in mind. Mostly made of laminated foam, this sailplane costs significantly less to fix or replace compared to others in the market. The design is composed of thoroughly researched materials keeping the theme of efficiency in mind. The resulting effect delivers similar quality while promising less repair costs. 

http://www.trendhunter.com/trends/glider-design

A Mindsets oferece-nos este Kit Didáctico, facílimo de programar, montar e operar, Cheio de Sensores e botões, ainda por cima, é acessível a 24 Libras:

CrumbleBot Robot for Crumble Controller 

The CrumbleBot is an ideal way to introduce young (and old) children to robotics using the fantastic Crumble controller.
All programming with the Crumble is extremely easy: drag, drop and click is all that is required to accomplish hundreds of simple and more complex tasks With this robot kit you can do experiments for: Basic movements (forward, reverse, left spin, right spin)
More complex turns (by moving one motor slower than the other)
Line following using the built-in line sensors with indicators
Light seeking or light avoiding using the built-in light sensors
Using the built-in Sparkles to give indications of what is happening
Use the built-in push-button switch to start the program, change mode or anything else you want 

http://www.mindsetsonline.co.uk/Catalogue/ProductDetail/crumblebot-robot-for-crumble-controller?productID=a2106972-5e21-4901-821b-719848cd1bf8&catalogueLevelItemID=28235202-fe9d-481e-9fe8-e5fec53b7a8a

Plasma CNC! E um Avião Telecomandado fácil de fazer, e reciclar Plástico, várias Máquinas!

Isto fará de qualquer Engenhocas um Fabricante!

Podem juntar-se uns 3 ou 4 Engenhocas, e assim comprar um Kit de Mesa de Plasma destes, e montar, partilhando o tempo de uso, e com o dinheiro que fizerem, comprar depois cada um a sua máquina...

Foto acima, e explicações, de como fazer uma Mesa CNC Plasma por menos de 5000 Dólares DAQUI:

CNC Router Parts Unveils Their New Plasma Table

Matt Stultz 

When you think of a CNC (Computer Numerically Controlled) machine, you probably think of a machine with a router attached to it, capable of cutting its way through wood, metal, and a variety of other materials.

Really, a CNC machine is a generic term for a family of fabrication devices. If you change the tool head, you can change the function and often the name. Add an extrusion head, and you have a 3D printer; a swiveling razor blade and you have a vinyl, paper, or cloth cutter; or add a plasma torch and you have a CNC plasma table capable of cutting through sheets of metal.

While we have seen numerous CNC routers and 3D printers come to market, very few DIY or kit plasma tables have found their way into Makers’ hands.

http://makezine.com/2015/06/04/cnc-router-parts-unveils-new-plasma-table/ 

E para os Aficionados do Aeromodelismo, podem agora fazer os vosso Modelos, com um Fio de Corte de Esferovite, ou Isopor, e pouco mais...

É bom!

Build Classic R/C Airplanes With New Method 

whiteboardwarriors2 

This Instructable will show how to build light-weight, electric versions of a couple of classic R/C airplanes quickly and cheaply using some simple methods. Other than a very simple hot wire foam cutter, which I will show, there are no special tools required. Using these techniques and materials, it should be cheap and quick enough that you can easily experiment with your own versions of your favorites and test many different designs with varying configurations of airfoils, wing dihedral, length, etc.

The impetus for this project was Das Ugly Stik, designed and built by Phil Kraft in the 1960's as a quick to build, semi-aerobatic plane to test his radios in (Here). It turned out to be one of the best flying, most popular R/C planes ever. My goal was to be able to test various air plane designs quickly and cheaply. A good example is the photo above which shows two essentially identical airplanes except that one is shoulder-wing and one is low-wing which were built to settle the debate about which was better for dog-fighting - high wing or low wing. 

http://www.instructables.com/id/Build-Classic-RC-Airplanes-With-New-Methods/ 

   

É fácil "cozinhar" plástico em òleo ou àgua, a 200 e  tal Graus, e fazer Placa de Plástico...

Mas eis um Engenhocas que viu um problema, a falta de reciclagem dos Plásticos, pois ele pôs Mãos à Obra, e tratou de fazer uma linha de máquinas para reciclar plástico, e está-se a dar bem com a Iniciativa!

Um exemplo a seguir, e sobretudo, um Site a visitar, pois ele explica como vós mesmos podem fazer exemplares estas máquinas todas! 

PRECIOUS PLASTIC

Plastic can easily be recycled. It needs relative low temperatures and pressures. Look around and you’ll notice plastic waste is everywhere around us. We just need to sort it and have tools to turn it into new things.

PRECIOUS PLASTIC – THE MACHINES

This project is a set of plastic machines, developed to set up a small scale plastic workshop. The machinery is based on general industrial techniques, but designed to build yourself. The machine is easy to use and made to work with recycled plastic. Whilst this entire project is still in development, the machines are shared open source online and improved by the community. 

http://www.preciousplastic.com/

Tornear Esferovite por Fio! Mais uma bicicleta em madeira, e Lagoa

Eis uma Novidade, ao contrário dos fios de Crómio, que estão sempre a partir, e só cortam a direito, eis algo que vos permite cortar Perfis, e até tornear peças circulares.

Aposto como também servirá para dobrar chapa de Acrílico...

A new twist to the hot wire foam cutter  

dave spencer

I'm not going to go into too much detail on building a hot wire foam cutter here. There are tons of great instructables and videos already.  I am going to show you how my laziness and impatience in building one paid off with a new material to use that will allow you to bend the wire into shapes to cut with.

http://www.instructables.com/id/A-new-twist-to-the-hot-wire-foam-cutter/

Como há Lojas das Rodas em todo o lado, podem fazer esta Bicicleta sem pedais, que é muito melhor para habituar os Míudos a andarem de bicicleta, que as miseráveis Bicicletas com Rodinhas...

Draisienne en bois pour enfant

Zeloko

Voici une draisienne entièrement réalisée en frêne.
Le cadre et la tige de selle a été réalisés grâce à la méthode du lamellé collé. Alors que tout le guidon est en assemblage tenons / mortaises classique.
L'idée première était de tourner les roues de 12 pouces en bois. Mais n'ayant pas trouvé de solution satisfaisante pour le contact avec la route, je me suis rabattu vers vers des roues classique avec pneu et chambre à air. Faut pas toujours tout réinventer ;)

http://www.lairdubois.fr/creations/225-draisienne.html

E se tiverem uma Placa Gráfica decente, esperimentem este programa de rendering On-line, que vos fará maravilhas para apresentar os vosso Objectos como deve de ser:

Lagoa

Lagoa makes photoreal 3D content creation accessible right in your browser.

Lagoa utilizes the power of cloud processing for photorealistic 3D visualization and collaboration, allowing users to create high quality renderings right in their web browser. Fast and powerful, Lagoa enables 3D artists, designers, engineers, architects and advertisers to collaborate while rendering and finalizing spectacular 3D content.

Lagoa offers:

• Cloud-based rendering with lightning-fast render times
• Optically accurate advanced materials
• Collaborative co-editing
• Real-world camera settings
• Volumetric accuracy for complex objects
• And more

http://grabcad.com/toolbox/lagoa

Um Tuga faz maravilhas,e Esferovite portátil.

A ideia de fazer uma Máquina enorme, impecável, mas enorme, que há meses mal gravava uma letra do tamanho dum Boi, fazer ISTO, é do camandro!

Para verem a magia dum Português, e ainda mais, duma Equipa de Portugueses, (dificílimo), quando se metem a fazer impossíveis, vejam este Filme, dá para ver o tamanho da cabeça desta Fresa CNC, quase do tamanho duma Cama de Casal:

Eis a Equipe, malta nova, mas capaz:

O Capitão da equipa, sim, também é o Engenheiro que contactam quando vão à Fablab EDP, agora:

E lá no Fablab EDP, já há quem tenha aparecido para fazer uma caixa para o Raspberry Pi, reparem na genialidade do sistema de molas que mantêem a caixa montada:

Por isso, e também para verem ao vivo, e em tamanho real, as Cadeiras do Tiago Rourke...


Aproveitem a recém-inaugurada Estação do Metro, de Moscavide, e VÃO LÁ!

http://fablabedp.edp.pt/pt/node/44

Una nota de interesse, mais uma Iniciativa da Innocrowd, estão a lançar o desafio para os nossos Inventores,  e Empresas, uma máquina portátil que faça Blocos de Esferovite, quem apareçer com uma, foneçe as máquinas para esta empresa. 

Description

SPWS is using EPS for road construction that would allow SPWS to use its patented technique for road construction using a monolithic foundation system with homopolymer / resistant aggregate pavement with a semi-continuous configuration. They are looking for an EPS block moulding machine supplier that would allow for the EPS blocks to be moulded at the construction sites. The machines need to be transportable from site to site, and eventually within the site by truck.

O Link do Concurso, para submeterem propostas, têem de estar inscritos no LinkedIn:

https://inocrowd.com/IC_Presentation/ViewChallenge.aspx?ChallengeKey=b7512679-76c1-495c-a83d-a9fcf08c95e6


Talvez a Esferovite.com concorra...

Endurecer esferovite (isopor)

Ora aí está uma combinação que permite fazer de tudo um pouco: 

-Trabalham fácilmente, com ferramentas baratas, Lâminas de corte, Cola própria, e Lixa;

-E depois de acabarem, aplicam-lhe Verniz de Madeira, ou um Líquido próprio, e lavável, e zás! 

Têem um Material resistente, para as vossas Engenhocas!

Neste Site de Miniaturas, falam do simples Verniz de Poliuretano para Madeira, para endurecer a Esferovite, parece que penetra nos interstícios da Esferovite, e aumenta a rigidez das peças:

A while back someone posted a foam hardening method while discussing making terrain boards using the normal expanded styrofoam. They stated that after they shaped the foam, they painted a polyeurethane type wood varnish onto the foam which soaked into the spaces between the foam "balls" and hardened creating a honeycomb of varnish. The foam was as hard as a rock afterwards. You might be able to use the varnish, then apply any texture you need on top and shape as needed.

http://theminiaturespage.com/boards/msg.mv?id=164060

Mas também há esta intrigante gama de produtos específicos para endurecer:

#026 - Exterior Foam Coat (3 lbs)

Brand New! Rock hard finish for all of your outdoor (and indoor) foam projects. This stuff is super tough. It is not sandable. Has a rough stone feel when dry. It can be troweled smooth, or brushed to make a super rough finish.

-Adheres to polystyrene foams.
-Forms a weather resistant surface.
-Easy to mix. Just add water.
-Covers Up to 300 square feet.
-Use above or below grade
-Apply with paintbrush or trowel.
-Paintable
-Fireproof
-Many decorative surface textures can be created.
-Soap and water clean-up.
-Try adding Boost fortifier. (will not work with Bounce)

  
http://hotwirefoamfactory.com/-026-Exterior-Foam-Coat.html 

Vejam os dois Links acima com vagar, são uma fonte desta e de muitas mais dicas...

Aqui está um vídeo ilustrando a aplicação destes produtos na Esferovite:

...E como se tudo isto não fosse o suficiente para vos pôr a cabeça à roda com múltiplas ideias, aqui vai a ùltima dica, a Ponoko agora corta...
Styrene!
Por enquanto só em 0,5 mm de espessura, atenção, podem agora fazer milhares de coisas com a precisão do Laser!

Styrene – May Material of the Month

The white knight of model making

Styrene, or as sometimes it likes to be formally addressed – High Impact Polystyrene Sheet (HIPS) is one of the most ubiquitous plastics around, even though it’s too humble for most of us to pay any notice to.  Like PETG, it’s commonly used in food packaging, where it’s thermoformed for specific applications. When it comes to laser cutting, fabricating components for model making is where this material truly shines.  Prefab laser cut model kits are already available for the likes of railways, trucks, aeroplanes and buildings.  Styrene’s properties make it an excellent material choice for these applications.  While it doesn’t cut as precisely as acrylic, it is easily sanded or scored with a craft knife, which is perfect for leaving sprues (little “bridges” of material) to hold parts in place.  Partially laser cut parts can be easily snapped off the kit sheet and sanded back for a clean edge.

http://blog.ponoko.com/2012/05/01/styrene-%e2%80%93-may-material-of-the-month/

3D pró Povo!

Com esta minha nova Gigajoga, podem cortar Esferovite, Isopor, no Brasil, com o método do Fio quente, sim, um fio de Tungsténio, e um transformador de 12 Volts.

Faz-se um Objecto em 12 cortes que são feitos a partir de outras tantas Bitolas, que são feitas a partir de 12 Vistas Paralelas dum Objecto, 360º à volta.

Dentro em breve, haverão Instrucções, mas aposto que os mais Reguilas já podem montar a coisa, só com esta imagem...
E com o meu Post que já viram, daquele Instructable bacano!
Lembram-se?

http://www.instructables.com/id/Turn-almost-any-3d-shape-into-a-real-object/


Pois cá eu, inspirado nessa grande ideia, idealizei uma máquina de corte que vos faz o trabalho todo:
Vocês enfiam o bloco de Material a cortar numa  peça que suporta o bloco em 12 posições sucessivas, e cortam à volta das Bitolas que encaixam na base dessa peça.
Vista 1, cortam,
rodam 1/12 da volta completa,
mudam a Bitola,
vista 2, etc.
Depois, é só lixar.

À venda, os Planos na Ponoko:

http://www.ponoko.com/design-your-own/products/3d-styro-cutter-7420

Instructables

Para começar, este rebuçado, um autêntico Manual sobre Alta Voltagem, MUÁHÁHÁHÁHÁ!

http://www.instructables.com/id/High-Voltage-1/

...Algo de despretencioso, mas engraçado, uma íris de Máquina fotográfica, mas em papel...

http://www.instructables.com/id/Paper-Mechanical-Iris/



...E uma Máquina CNC feita de Cartão de Maquete!


Foamcore CNC from Ilan Moyer on Vimeo.

http://www.instructables.com/id/Build-a-Foamcore-CNC/

3D Interactiva!

Fazer 3D à unha?

 Sim, os dedos moldam, em 3D!

...E este cortador de Esferovite, por Computador:

Vem com um Vídeo:

Vejam isto, e mais coisas incríveis, aqui:

http://www.interactivefabrication.com/