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Mini Metal Maker is small DIY 3d printer that prints objects suitable for jewelry production, watchmaking and small gears modeling,  small pistons and generally small metal parts. It uses precious metal clay that needs to be put in a high temperature kiln in order to get into metallic form. it will not make "regular" sized hard metal parts. It is more oriented towards craftsman and artisans.

From the Mini Metal Maker page:

The impact



The Mini Metal Maker is a game-changer in the world of do-it-yourself 3-D printing. It gives engineers and designers a new tool for fabricating precision parts without expensive machinery or difficult manual processes. It puts a powerful new tool in the hands of artists and craftsmen for creating customized repeatable items in metal. It is also a valuable and accessible educational tool because it is low cost and small enough to be portable.

I've always dreamed of being able to print miniature parts and detailed sculptures directly in metal. To me, the Mini Metal Maker moves 3D printing from the land of plastic toys into the real world of arts, science, and engineering. I have had so much fun creating and using the Mini Metal Maker, and believe that you will too. 

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FAQ
What is the Mini Metal Maker for?
The Mini Metal Maker is for printing custom jewelry such as rings and gem settings, sculptures, specialized machine parts, ornamental hardware, metal chains, or even special hardware such as miniature turbines or pistons.

Who will use the Mini Metal Maker?
The Mini Metal Maker is for anyone interested in creating small detailed metal objects. This includes the 3D Maker community and as jewelry artisans. The Mini Metal Maker is also a valuable tool for design engineers and machinists, who require small runs of specialized hardware for creating prototypes. The Mini Metal Maker adds new capability for the DIY inventor or artist by making fabrication in metal easy and direct.

What's the print bed size?
The print bed currently allows for prints up to 2.3 inches x 2.3 inches x 2.3 inches (6 cm x 6 cm x 6 cm) in size. The movement resolution is up to 1600 steps/mm.

How does the clay become metal?
The device prints with a commercially available jewelry product known as "metal clay." This material is a pre-mixed emulsion of metal particles in a water soluble organic binder. When heated in a kiln (600˚C-900˚C) the binder burns away as the metal particles fuse together.

Where can I buy materials for the printer?

I have been purchasing various metal clay materials online from Amazon and also through e-bay. The Mini Metal Maker requires the clay to be precisely mixed to a special consistency. I will provide pre-mixed syringes of clay along with the parts and software for the MiniMetalMaker.

Can I use it with other clays, or just metal clay?
The mini metal maker will work for most water soluble clay or ceramic type materials if the consistency of the material is properly mixed. Refining this mixing process for each of the available types of clay is an important part of the research and development we are currently completing. Since the device extrudes from commercially available syringes, it is entirely possible for users to develop their own clay blends. We will make pre-mixed clays of different varieties available for sale along with the Mini Metal Maker.

How big is the printer?

Our current printer measures 16 inches (41 cm) tall, 7 inches (18 cm) wide, and 12 inches (30 cm) deep. The new prototype will be slightly deeper in order to accommodate bed motion for two heads in place of just one.

Will it work with Windows 8? How about Macintosh?
Yes, and Yes. The core computer for the Mini Metal Maker is an Arduino Duo running modified Sprinter-based open source firmware. We are developing a cross-platform work environment for loading your objects into the printer.

Do you always need a computer to print?
No. It will be able to print directly from SD cards. Our current prototype requires a connection to a computer, but we are designing the production model to print directly from a compact flash chip that is inserted into the machine.

Does it work with a USB port?

Yes it does. It just has a standard printer-type USB cord that you could pull out of the back of your normal printer and connect to this printer.

Does it cause indoor air pollution or health problems for users?
No. The Mini Metal Maker does not cause any fumes or air pollution. The clay is water based and non-toxic, as its original purpose was for sculpting by hand. Also, the entire machine operates at room temperature because it does not have to melt plastic. You will need to purchase a small *kiln, however, in order to fire the objects.

*Kilns of any sort should be located in a well ventilated area away, often in a garage or a covered outdoor work area.

Mini Metal Maker homepage, detailed build files should be available there in the future:

http://www.minimetalmaker.com/

They had very successful Indiegogo campaign, hopefully they will release the plans as planed:

http://www.indiegogo.com/projects/minimetalmaker-a-small-3d-printer-that-fabricates-with-metal-clay



























Take a look at Newton 3d, printer based on same technology:

http://diy3dprinting.blogspot.com/2014/02/newton-3d-diy-metal-clay-3d-printer.html

Limited information is available on this printer, except few video showing only printing and limited photos of print results. It uses metal clay as printing material and that type of material requires high temperature kiln for finishing.
It also aims specialist makers such as jewellers, product, homeware and fashion designers.

Newton 3d homepage:

http://newton3d.com/

They have a subcategory on My Mini Factory site with some objects you could make on Newton:

http://www.myminifactory.com/search/category/96/Newton-3D-Metal-Printing































Here is a metal clay printer with similar features, the Mini Metal Maker:

http://diy3dprinting.blogspot.com/2014/02/mini-metal-maker-diy-metal-clay-3d.html

If you are into wearable electronics and 3d printing you can combine them with this type of project. One of my friends made cycling jacket with hand gesture activated direction blinkers. With 3d printer, GEMMA controller and NeoPixel LEDs from Adafruit you can make this cool coat buttons.


Detailed build manual on Adafruit learning system:

http://learn.adafruit.com/neopixel-coat-buttons/

http://www.thingiverse.com/thing:226407

Lux is a new open camera project. It has 3d printed housing which can be printed on i.materialise or Shapeways, using the "Polished White Polyamide" or "Polished White Strong & Flexible" materials. It is powered by Trinket micro arduino controller.

Specifications:

• Type: 6x6 Box Camera
• Media: 120 Roll Film
• Objective: 65mm f/5.6 Single Element, Coated
• Viewfinder: Waist-level Brilliant finder
• Shutter: Electromechanical single-leaf, 1/125-1s + B&T
• Aperture: Rotating diaphragm, f/5.6-32
• Dimensions: 7.9 x 9.4 x 11.7 cm
• Construction: SLS Polyamide (body), Stainless Steel (shutter, aperture)

Lux camera homepage:

http://kekado.zapto.org/kevin/open.html

Flickr stream with some videos of Lux in action: http://www.flickr.com/photos/frostedbutts/with/11893611496/

Photo taken with Lux open camera

Here is much simpler 3d printable camera, the Pinhole, but it can be fully 3d printed on your home desktop printer:

http://diy3dprinting.blogspot.com/2013/10/pinhole-diy-3d-printable-camera.html

Nice DIY project by Adafruit Industries with their parts. It uses NeoPixel LED ring and Trinket micro arduino controller.

http://learn.adafruit.com/3d-printed-camera-led-ring

http://www.thingiverse.com/thing:235242

Just a nice video overview of CES2014 3d printing by some geeks.

Source:

https://www.youtube.com/user/pox98?feature=watch


... and a bonus video, 3d printed pizza!!!

Instructables user rmd6502 made a detailed tutorial how to design a 3d printed soldering mask for your electronics projects. he goes from Eagle EPS to PDF format, then PDF to DXF and then uses OpenSCAD to get the final STL.

He writes:

This is a neat way to save a bit of money when you order boards. Normally you pay an extra $25-50 for a solder stencil, either a silkscreen or a sheet of metal with holes where the solder paste needs to go

Detailed guide can be found at:

http://www.instructables.com/id/How-to-3D-print-a-solder-mask/?ALLSTEPS