First ever affordable 5axis multi-fabricator that brings most advanced fabrication right to your desk:
We’ve designed machine that combines multi- fabrication methods: 5axis milling being one of them. 5AXISMAKER is a machine versatile enough to fabricate most advanced design prototypes in readily available material while on your desktop right next to you.
Being an alumni of Architectural Association we’ve had an access to most advanced fabrication tools in the world. Yet there is no desktop prototyping machine that has versatility to replicate this technology.
Our company has been initially found as design and fabrication practise, and after years of working with wide range of designers from different fields it has become clear that one should have an instant access to a pallet of prototyping tools. We wanted same machine to include a set of tools like CNC mill, touch-probe, 3d printer, wire-cutter and have a potential for further add-ons.
5AXISMAKER: First ever affordable 5axis multi-fabricator - [Link]
by JColvin91 @ instructables.com:
Whether we care to admit it or not, motors can be found all over in our everyday lives; they just tend to be hidden. Motors are present in cars, printers, computers, washing machines, electric razors, and much more.
However, there are a number of people (which until recently included myself) that would be uncertain of how to make a motor run if they were handed one. So, let’s learn something today. Let’s learn how to use a stepper motor!
How to use a Stepper Motor - [Link]
An instructables on motor controllers for cheap robots by JayWeeks
Almost every robot needs to power a motor of some sort or another. Problem is that motors take quite a lot of power, compared to what most microcontrollers operate with. To solve this problem, robots use what is called a motor controller, which usually amounts to some form of electronic switch that can turn on a very high voltage, using a very low one. That’s what we’ll be making today!
Motor controllers for cheap robots - [Link]
A magnetic stirrer uses a rotating magnetic field to mix fluid samples, such as buffers and media for growing bacteria. Since only a small magnet bar has to be put inside the sample/fluid, the risk of contamination is minimized. For protein purification, overnight sample dialysis steps often utilize magnetic stirrers.
Below are beta release DIY instructions for a magnetic stirrer this summer, courtesy of Malcolm Watts and Massey University in New Zealand. The stirrer runs of off a battery and has multiple speed settings.
You can also download the pdf: magnetic_stirrer_betarelease_V01
Magnetic Stirrer - [Link]
Trandi blogged about his RC servo and stepper motor project. He writes:
For those interested in reproducing this example:
The board is called “EP2C5 Mini Board” and has a EP2C5T144C8 Cyclone II FPGA on it
I used a standard, 9grams micro RC Servo
I used a 28BYJ-48 stepper motor and it’s driver (you can purchase these as a bundle for very cheap on dealextreme or banggood)
I used the free edition of Quartus II from Altera, version 13.0 SP 1 (be careful, later versions do not support Cyclone II FPGAs anymore)
I created a simple project, pasted all this code as a single module (it would of course be cleaner to separate the RC Servo and stepper control code into independent modules)
made the “Top level entity” in the General configuration page equal to “counter” (the name of my module)
used the Pin Planner to assign the inputs/outputs as follows:
FPGA : RC Servo and Stepper motor control in Verilog - [Link]
Conventional electric motors rely on the forces of electro magnetism to provide motion. An item in the UW-Madison news letter announced that a motor is under development at the headquarters of C-Motive Technologies which uses the force of electric fields.
According to Dan Ludois, an assistant professor of electrical and computer engineering at the UW and co-founder of C-Motive Technologies “We have proven the concept of a new motor that uses electric fields rather than magnetic fields to transform electricity into a rotary force, the distinction may sound minor, but it could solve a number of practical problems while saving money”
An Electrostatic Motor - [Link]
Ondřej Karas of DoItWireless writes:
We described simple method, how to drive modellers servo. Today, we are going to try to drive this servo from potentiometer connected to TR module ADC. It is reaction to forum thread where is discussion about airplane model control possibility.
Wireless servo controller II - [Link]
If you’re into electronics, engineering and making things move, you’ll need a good handle on electric actuators. Use this beginner’s guide to electric actuators before you set out to purchase your first actuator.
What is An Actuator?
Before linear electric actuators were around, the only way to make a robot move forward was to use rotary actuators. Linear actuators changed all that. When it comes to electric actuators, you’ve got two main choices: lead screw and ball screw. You’ve really got a ton of choices, like peizo-electric, and there are a ton of innovations happening right now, but for this article, we’ll stick to the basics.
Lead Screw Actuators
Lead screw actuators use a threaded lead screw and a nut to create motion. The gear system runs, turning the screw moving it along the nut.
Here’s a quick diagram to illustrate the idea.
by Arc Robotics:
There have been a lot of amazing projects come out of the Maker revolution, however, many are limited by the capability of their motor controller. We want to change that. The Arc-Controller is a bridge to bring high Amp motor control to your projects, up to 43 amps with a heat sink. It is capable of variable speed and direction control over a single Stepper Motor or two DC motors, because when do you only need one motor.
The Arc-Controller is compatible with about any Arduino, or other micro controller such as Raspberry Pi. It runs an ATMega328, and is user programmable via the Arduino IDE. Thanks to the ATMega the Arc Controller can run as a standalone micro controller or be slaved by any other device. Giving Makers the ability to push the limits of what has been done and change the power to change the world.
43 Amp Arduino Motor shield, the Arc-Controller - [Link]
Everytime we need to test a stepper motor controller we have to connect it to the parallel port of the computer or to a function generator to obtain the necessary pulses the realize the movements of the stepper.
This is a quicker method to check a controller integrity. Simply to make the life easier here is a square wave signals generator. A potentiometer or a trimmer regulates the pulse generation of the 12F675 microchip (a square wave, between 20 hz and 3khz). Ok, there are thousands of different ways to create a pulse generator, but we had a lot of microcontrollers.
12F675 pulse generator - [Link]