Blog Posts

quarta-feira, 13 de maio de 2015

Um Braço robótico para Fabbers! E a Samsung com Arduino, Ímanes de desligar, Espessura em 3D, e um actuador simples

Makerarm é um Braço Robótico, para Makers, o que dizer nós, Engenhocas! 
Esta gibajoga promete, pois pode ser a base para Impressão 3D, Corte Laser, Fresa CNC, Plotting, Montagem, e mais...
Vocês mudeam a cabeça do Bicho, de Impressão 3D para Corte Laser, por exemplo, e já está!


Makerarm is a complete personal fabrication system packed into a single, beautifully designed robotic arm that mounts on your desktop. Makerarmfeatures interchangeable heads for countless applications such as 3D printing, plotting, milling, laser engraving, electronics assembly and more. That way you can make more, for less.

A Samsung, deu-lhe para se meter no mundo do Arduino, para colaborar com a Internet de coisas, essa história de ter os aparelhos lá de casa todos ligados à Net...

Samsung Announces Their Entry into the Arduino Family
Matt Stultz
When you think about Samsung, the first products that come to mind are probably phones or televisions, not Maker-focused electronics. Today, with their announcement at Internet of Things World, Samsung has entered the Maker world with their ARTIK platform, an Arduino compatible family of devices targeted towards Internet of Things applications.
Currently there are three ARTIK devices: The ARTIK 1, ARTIK 5, and ARTIK 10. All are multi-core ARM processors with built in Bluetooth Low Energy. The ARTIK 5 and 10 also include Wi-Fi, BT, Zigbee, and Thread wireless connections.


Se sempre quizeram saber como funcionam aqueles Braços de Laboratório e Oficina, com os Ímanes na base, de ligar e desligar, está tudo aqui:

Magnets with an OFF Switch

Can neodymium magnets be turned on and off?
Generally, no. The neodymium magnets we provide are also called, “permanent magnets.”  The word “permanent” means they stay magnetized for a long time.  They are always on.
This is the opposite of an electromagnet, where you have to run an electric current through a wire whenever you want it to act like a magnet.  No flow of electricity, no magnet.
It's also opposite of a "temporary" magnet, like when you stick a (permanent) magnet to a steel paperclip, and that steel acts like a magnet as long as the (permanent) magnet is stuck to it.  Remove the magnet, and the paperclip stops acting so magnet-like.
When people ask us for magnets that can be turned off, we say it’s not possible.  Neodymium magnets, large and small, tend to stay ON.  That's part of what makes them so useful.


Eis como fazerem bem as paredes duma caixa ou outro Objecto ou Peça que queiram imprimir, explicado por quem sabe, dica da Imaterialize:

How to Choose the Perfect Wall Thickness When Turning Your 3D Model into a 3D Print

Since each printing material and 3D model is different, choosing the right wall thickness can be confusing. Yet, keeping these simple tips in mind will ensure that you won’t receive an unpleasant surprise and the walls of your object will have just the thickness they need.
First things first: it’s very important that every surface in your 3D model has been assigned a wall thickness. When using your 3D modeling software it is possible to design a surface without a wall thickness. However, our printers need the information about how thick you intend the wall of your object to be. Thus, when turning a 3D model into a real 3D print, wall thickness is needed.

Eis como fazerem um Braço actuador linear com muito pouco...
Usando Sucata, uma Seringa de cola e uns poucos outros componentes:

Build This Inexpensive Linear Actuator from a Glue Stick
Andrew Terranova

A linear actuator is a mechanism that pulls or pushes a load along a straight line. Pneumatic and hydraulic pistons are examples. So are the threaded rods on 3D printers.
Commercially available linear actuators can be quite expensive, but now you can build your own with just a few dollars worth of parts. Gareth from Let’s Make Robots explains the idea in this post.
The main mechanism is salvaged from a used glue stick. By using a modified hobby servo to drive it, this actuator even comes with positional feedback. It is both surprisingly accurate and surprisingly strong. Check the video to see the finished actuator lifting a 6 lb weight!

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