Blog Posts

quinta-feira, 28 de março de 2019

Moldes! E a Shapeoko, uma CNC Modular, uma Escritora de Pavimento, e uma 3ª Mão!

A Impressão 3D demora muito tempo!
Mas os Moldes para Injecção de Plástico, permitem-vos produzir não uma ou duas, mas centenas de peças.
O que vos resolve uma data de chatiçes...
E vos dá muito mais DINHEIRO!
 



10 CAD Tricks for Mold Design
Michael LaFleche

Mold design is one of the most complex aspects of product design. Not only are the part geometries challenging, but the timeline to get jobs quoted and manufactured are tight. OEM design companies sending designs to contract mold designers is typically the last stage of the design cycle, and “tooling up” can be some of the most expensive parts of the project.
Luckily, there are some mistakes that part designers and mold makers can avoid to reduce time and cost.














Eis a ùltima Fresa CNC Shapeoko, e vem carregada de novidades, para uma máquina que já era uma maravilha, como estava:






2019 Shapeoko 3 (XXL) CNC Kit Review – Editor’s Choice
Tyler Koslow

Arguably the most popular “desktop-sized” CNC router of the day, the Shapeoko 3 from Carbide 3D has origins waaay back in 2011, when its creator Edward Ford launched Project ShapeOko on Kickstarter.
A sub-$300 open-source CNC machine kit, Project ShapeOko was an affordable entry point into the world of CNC carving, achieving the fantastic feat of simplifying the procurement of parts for an open source project.
With a build comprised of electronics, plus other sundry items such as laser cut plywood sourceable from Shapeways and Ponoko (hence, ShapeOko) and one other provider, Ford’s original machine was a trailblazer.
Fast forward seven years, and much has changed. In 2014 Ford joined forces with CNC machine and CAD/CAM software company Carbide 3D, becoming a partner and VP.


https://all3dp.com/1/shapeoko-3-xxl-review-specs-carbide-3d/
















...Mas esta máquina é impressionante, Impressora, Fresa, e Laser CNC, basta mudar as cabeças.
E fazem-na em casa!




Modular DIY CNC V2
jtaggard

I build my first CNC about a year ago and learned a lot from the process. As an engineer I'm always looking at ways to improve things, and my first machine was no exception. The process began with some small changes which quickly turned into the opportunity to overhaul the design even more to better suit my needs (an overview of these changes is detailed in the next step).
















Uma Impressora, mas para escrever no chão, algo que suspeito, vai ser muito usado em MakerFaires...




StreetWriter
charlesglorioso

I started this project because I wanted to make my mark on the world but didn’t want to leave any aftereffects.
I also wanted a challenging project for my new 3D printer that involved some Arduino Programming.
Finally, I like to build things using as much “found” stuff as possible.
As the videos show, StreetWriter does all of that. It writes 8 inch high messages in water on the pavement as it moves, and leaves no trace once the water evaporates.
I have built two StreetWriters, with minor design differences between them, This Instructable, is based on the second build which is somewhat improved.
In StreetWriter, water is pressurized and fed to a manifold which carries 8 automotive fuel injectors. As StreetWriter moves forward, the Arduino controls the fuel injectors, squirting water onto the pavement. The message to be written is one of 8 that have been written onto an SD Card plugged into the Arduino. The operator can easily select among the messages and can create new messages on the SD card at a computer. There is no length limit on any one message other than the amount of water in the pressure tank. The longest message I have written so far is PI to 300 places.
















...E acaba-se, por hoje, com esta 3ª Mão, para não terem uma crise de nervos, nem quemarem os dedos, quando estão sós, na oficina!





Magnetic 3rd Hand
lonesoulsurfer

Anyone who plays arounsd with elecronics knows how important a 3rd hand is. It gives you the ability to hold solder in one hand and the soldering iron in the other and easily add solder to a component.
I've been using some homemade 3rd hands for some time and can't imagine building a circuit without one. Recently I was using a couple of magnets for a project and a resister got stuck to it. I had a bit of an epiphany and realised that adding a magnet to a 3rd hand would be a quick and easy way to hold a part whist I add solder to it.
The project is an easy one and will definitely become a welcome addition to your solder station.

https://www.instructables.com/id/Magnetic-3rd-Hand/







quinta-feira, 21 de março de 2019

Impressora 3D Portuguesa! E uma fresa CNC económica, a Lista de Geller, solas à medida, e packs de baterias de Lítio!

A BeeVeryCreative, 100% Portuguesa, está de parabéns, com este magnífico Kit, uma sólida e inovadora Impressora 3D, que o nosso Amigo, Angus, revê, sem favores, mas com justiça, e muito positivamente:




This is an i3 KIT you'll want to check out - B2X300 Review
Maker0s Muse

The B2X300 is a Huge, Open Source 3D Printer Kit with 2019 smarts and a killer design - but is it right for you? Watch to find out!













Para poderem ter uma Fresa CNC em casa, por 500€:



LOW COST DIY 500€ CNC MILL
Vulcaman

Hi,
in this Instructable I want to show you, how you can build your own CNC-Mill for less then 500€. I designed this machine for CNC-beginners, who don't want to spend a lot of money for their first experiences with CNC machines but also expecting a rigid and professional looking CNC.
This machine is perfect for maker, tinkerer and everyone who wants to start CNC-Machining.
In the pricerange of sub 500€ you will not find any other CNC with these features:

  •  710 Watt spindle motor
  •  MGN linear-rails on all axis
  •  1204 ballscrews on all axis
  •  effective workarea of 250x220mm
  •  max. travelspeed of 3000mm/min (at 12V)
  •  high accuracy of 0.1mm in all axis
  •  super rigidportal frame (out of one piece of wood and aluminium extrusions)


https://www.instructables.com/id/LOW-COST-DIY-500-CNC-MILL/











Algo de muito útil, a lista dos tópicos dos fantásticos Vídeos de Dan Gelbart, um Génio da construcção de Protótipos, e penso TODOS os Engenhocas deviam ver os seus vídeos, para evitarem muita dor-de-cabeça, e fazerem muitas mais coisas do que pensam possíveis, com os meios de que dispôem:



Dan Gelbart : How to Build Stuff
Al-Hala

Dan Gelbart has an excellent and well-presented series on YouTube on machines and prototyping. It`s a short course on how to build stuff aimed at students, researchers and others who are not machinists by trade. It`s applicable to prototyping and limited production with enabling technology in 18 parts, which I’ve listed links to below. Note: the chapters were obviously shot out of sequence, as there is referral to `as we`ve seen before` when we have not. It`s not that bothersome.











Para o bem dos vossos pés, têem agora este Site onde podem desenhar solas para os vossoa sapatos, para imprimirem em Filamento flexível, e até, solas correctoras de defeitos!








What is Gensole?

Gensole is a browser based tool which allows you to design insoles, optimised for 3D printing using the FDM process and Filaflex (TPE/TPU) type materials. It will ultimately export .AMF files for importing into Slic3r for 3D printer toolpath creation.
It is free for makers, and researchers for non-commercial use :

http://gensole.com/












...E acabamos, por hoje, com este Instructable para os que precisam de uma série de Baterias de Lítio para toda a espécie de Enhenhocas!




How to Make a 18650 Li-ion Battery Pack!
Nematic!

18650 Li-ion cells are a great way to power Projects. Which provides a nominal voltage of 3.7V which is not sufficient for most of the application for let's say you want to power a BLDC motor with an ESC which requires 9V to start. So we need more voltage which can be achieved by connecting them in series. So in this tutorial, I will show you how you can make a 18650 Li-ion Battery Pack with a BMS circuit and all the things you need to know before you built one!













quinta-feira, 7 de março de 2019

Um Clone de Prusa! E um Escafandro feito em espuma(!), dobrar cartão, uma Empilhadora R/C, e um Gerador de Sinais de RF

Um Clone da Impressora Prusa, e ainda por cima, o mais Económico possível?
É BOM!
Vejam aqui como se faz, e assim, mais gente poderá ter uma Impressora 3D...
Ou, os que já as tèem, podem ter ainda mais! 
LOL




Building the cheapest possible Prusa i3 MK2
Tom

What is the cheapest possible, real 3D printer you can buy without making one compromise after the other? That’s the question we’re asking by building a Prusa i3 MK2-style 3D printer that comes with most of the important features of the original one from Josef Prusa and requires a bit more work for sourcing and building the machine, but most importantly, we’re going to build it only with the most affordable set of parts.
This page will serve as a hub for part lists and build guides as the project moves along! All build videos and the accompanying project videos have been organized into a neat playlist!

https://toms3d.org/2017/02/23/building-cheapest-possible-prusa-i3-mk2/









Por incrível que pareça, podem fazer ISTO, com Placa de Espuma de Plástico, e por isso, é de aproveitar, malta!
Recriação Histórica, Carnavais e Espectáculos, Montras de Lojas, um sem-fim de usos...







Recreating an Antique Divers Helmet From Foam
LostWax

I love the ocean. I can sit on the beach all day just watching the waves do their wavey thing. Sadly, I happen to live in the middle of the Canadian prairies. No ocean to watch here. But there's always the world of make-believe, and what better way to get in the ocean vibe than with an amazing deep sea diver costume. I created this costume pattern to try and recreate the feel of the classic "Mark V" dive helmet which has become an iconic image of divers and the sea. It was used by the U.S. Navy from 1916 until 1984! Let's make one of our own.

https://www.instructables.com/id/Recreating-an-Antique-Divers-Helmet-From-Foam/











Eis mais algo de simplesmente espectacular, na sua simplicidade, uma Ferramenta para dobrar aquele Cartão que podem ter por aí, para uma série de novos usos:







Cardboard Bender
nml235l

A tool is something that makes life easier and more convenient. I have got a rather huge mass of cardboard (a cause of a new furnishings :-)) and appropriate number of ideas to make something with it (Bag for Containers). One problem is bend operations. Cardboard plates have a multiply layer (as usual) so I get clumsy splits during bending. To prevent such behavior I decided to flatten cardboard according the bend line. At this moment we get situation for a ... NEW TOOL. How to make flattening along the path? Certainly, using a one of the ancient inventions – the Wheel. We need only move the wheel (roller) along the path on cardboard surface with giving insignificant pressure. This principle we use in home preservation to connect bank and cover (or let's remember about the roller-machine for road construction). Concept of a tool is very simple: roller (wheel) and handle – nothing more.

https://www.instructables.com/id/Cardboard-Bender/









Este é um projecto que vai ser a alegria de muita gente, ainda mais porque é Open Source, todas as peças e planos à mão, para todos tentarem...
Uma Empilhadora em miniatura, tele-controlada, até a partir dos vossos Smartphones!
Dá para a mandar ir buscar os chinelos, do sofá...








Arduino Forklift
Leon van den Beukel

This is a video about making a remote controlled forklift car. I've used Fusion 360 to design and create the 3D printed parts and CNC machining templates. If you don't have a CNC machine you can also use a jigsaw to cut out the wooden parts. I've provided the cutting templates, sources and 3D printing STL files on my GitHub page:















Este Gerador de Sinais para Rádio-Frequência, vai fazer a alegria dos Macanudos, aquela malta dos Rádio-Amadores, um equipamento que serve para afinar os vossos emissores:






RF Signal Generator
Milen

The RF signal generator is a must to have tool when playing with radio receivers. It is used to tune a resonant circuits and adjust the gain of different RF stages. Very useful feature of the RF Signal generator is its modulation capability. If it can modulate the frequency amplitude or frequency makes it non replaceable tool for RF design works.
Some time ago I have designed an AM modulator, which could be used for such purposes. It works fine in some cases, but it has the disadvantage to be not able to work as standalone device. It requires additionally power supply module and two signal generators - for the RF carrier frequency and for the modulating signal. This makes it inconvenient to work with it outside the house. I decided to create an RF signal generator working as fully functional stand alone device. Instead to base the architecture on the modern DDS chip, I decided to use the analog approach. As a basis I have chose an existing RF signal generator published here. Similar design is described also here. The credits for this design go to their authors. I repeated mainly the first design adding additional digital frequency counter instead the not very precisely radial scale analog calibration.

https://www.instructables.com/id/RF-Signal-Generator/







 

sexta-feira, 1 de março de 2019

Fundição PLA! E um Cadinho eléctrico, um Stepper DIY, Acústica caseira, e segurem o Filamento,

Estou farto de dizer isto, a Impressão 3D pode ser grandemente amplificada, usando-a como Moldes, para  a Fundição de Metais!
E usando uma Àrvore de fundição, para produzir N peças de uma só vez!







Lost PLA Casting - making & using a Casting Tree #pla4
VegOilGuy

Casting Trees are a great way to produce a large number of castings in one pour. But can this technique be used with a 3D Printer in Lost PLA? Yes! Jewellers and Ornamental Casters have been using this approach for years and I wanted to try it. In my last video I tried to make 5 pendants in one casting, but only 1 turned out okay. This time I try for twelve and almost nail it. With just a 3D printer and a little imagination, it's possible to make some incredibly detailed castings using the Lost PLA method.











E se querem meter-se nisso, sem usar Gás ou Carvão, podem usar este Método, que se pode usar em qualquer parte, sem causar alarme!


 


Zero Cost Aluminum Furnace (No Propane, No Glue / Epoxy, No Welding, Individually Replaceable Parts)
quickshadow_2

NOTE: THIS ITEM CAN BE USED TO MAKE CASTINGS AS GIFTS FOR ANY HOLIDAY OR OCCASION!
As seen from the picture and title this instructable is about how to make a zero cost aluminum furnace from salvaged items from your local scrapyard or around the house.
Please be advised that though this aluminum furnace can truly be made at zero cost, for some steps you may want to substitute a tiny bit of money for less hassle and trouble, throughout this instructable i shall be pointing out these steps and how you could do so.
BTW this aluminum furnace build can seriously smelt down a lot of aluminum, but takes a while to heat up, so ensure that you have a large store of scrap aluminum before using, for maximum efficiency.

https://www.instructables.com/id/Zero-Cost-Aluminum-Furnace-No-Propane-No-Glue-/










Um Stepper não serve de nada, sem um Controlador, e cá está como o fazerem vocês mesmos, com este Projecto:




DIY Stepper Motor Controller
DIY KING 00

Remember those DC motors, all you need too do is to hook up the positive and negative leads to a battery and holla it starts running. But as we started doing more complex projects those DC motors doesn't seems to deliver what you need.... yes I mean efficiency, precision and above all torque without any gear reduction.
Well the story started as I planned to built a semi automatic drill press which can help you drill through objects like a usual drill press but with the help of a foot pedal so that you can hold the object with both your hands without the need of a helping hand. Long story short I need a motor that can move the drilling head up and down precisely and also offers a good amount of torque.
Failing to get all those from a simple DC motor I decided to use a stepper motor. Yes the one that has four wires and thats all I knew about them.So I in this instructables we are going to make a controller for these four wire stepper motors that enables us to control the speed and direction of the motor without using a micro controller.

https://www.instructables.com/id/DIY-Stepper-Motor-Controller/









Um Estúdio de Som no vosso Quarto?
Podem fazê-lo, assim, com estes Painéis Acústicos que aprendem a fazer, neste Instructable:





Scratch Built Acoustic Absorbers for Bedroom Studio
epicchum

Hey everyone! I'm in the process of converting my bedroom into a bedroom studio for music recording and production, so I thought I would teach Y'all how I made my acoustic absorbers!

https://www.instructables.com/id/Scratch-Built-Acoustic-Absorbers-for-Bedroom-Studi/
















É bastante irritante, quando a Impressora está alegremente a imprimir coisa nenhuma, porque o Carreto de Filamento conseguiu encravar o fio!
Esta é uma solução impecável, para poderem mandar imprimir a Máquina, e irem às vossas vidas, com confiança! 
É bom!






CreativeTools Creates Most Unique, Innovative 3D Printable Universal Filament Holder Yet
Whitney Hipolite

...
The other day, I was printing out some toys for my son. I had to leave the house for two hours, and fully expected that when I returned I would have 3 little toys laying finished on my print bed. Unfortunately, when I returned to check on my prints, the printer had completely stopped printing halfway through. I couldn’t figure out what went wrong… until I looked at the filament and found that it had become tangle up upon itself, preventing its own flow to the extruder. The 3D printer had no other option but to shut down. This was completely my fault, as I had been provided with a sample of filament to try out, and because I was in a rush, I had just put the filament to the side, rather than on a spool. This allowed it to easily knot itself up and ultimately terminate my print job.

If you were to browse websites like Thingiverse, you would discover hundreds of filament spool holders, all of which are unique in their own right. However, none are as innovative, as comprehensive, and frankly quite as amazing as one which was just created by a company called CreativeTools, and its CEO Paulo Kiefe. Called the ‘Universal Stand-Alone Filament Spool Holder’, it is entirely 3D printable and its name simply does not do it justice.

https://3dprint.com/20280/3d-printer-spool-holder/