Mar 30, 2015

Retro designed 3d printer in post-WW2 table saw frame

I LOVE the design of this 3d printer made by Chad Bridgewater! It is a true piece of art! This custom combines modern technology and vintage design as he developed his 3d printer based on a frame of old post-WWII Craftsman table saw.  He re-purposed this two machines for his MFA thesis and he will aslo present old press drill turned int CNC mill.

Here is his NOS 3d printer in old table saw:

Kudos Chad! You Sir are a master craftsman!

You can see more details and much more pictures at his blog here:

He also made a laser engraver in post-WW2 table saw:

Thanks for the tip Franklin Flood!

Here you can see hiss drill press upgraded into CNC router:

... and some photos from his MFA exhibition:

Cool toolboxes!


Chad has a new project:

Mar 29, 2015

Aakar Brainboard v2 Indian open source control electronics

Aakar Brainboard v2 is a new modular open source electronic controller board from India .

Here is the summary from the Indiegogo campaign page:
Aakar means Shape in Hindi. Aakar Brainboard v2 is a modular CNC controller board based on LPC1768/69 Cortex-M3 chip. Due to its modular design it allows easier upgrades as per requirements and easy replacement if there is any broken part. It runs on open source Smoothie modular firmware and is targeted at 3D Printers, Laser cutters, CNC Mills, Pick and Place and other small or Mid-size CNC machines. Upgrade your machines for higher performance and features.

Here is more detailed presentation:

Aakar Brainboard v2 tech specs:

  • NXP LPC 1768 32-bits Cortex-M3 MCU, running at 100Mhz. 512kB Flash, 64kB RAM.
  • Drag and drop flashing : simply drop a new firmware file to the Aakar drive to update.
  • USB2 Composite device : shows to the computer as both a Serial device, and a Mass Storage device ( exposing the SD-card).
  • Ethernet.
Power outputs
  • Up to 3 through hole 10A, Mosfets sharing a power circuit.
  • Up to 2 Mosfets with options of regulated 12V output for Fans.
  • One Mosfet with separate power supply 20A, up to 36V.
  • One optically isolated DPDT relay ~240V,5A for driving AC loads like milling tools or vacuum pumps.
  • Regulated 5V and 12V headers.
  • Two standard servo connector powered from onboard 5V regulator.
  • 4 Thermistor (12-bit ADC ) inputs.
  • 6 Endstop inputs.
  • Play/Pause LED and Button
  • Connector for Serial Graphic LCD Panel with encoder and buzzer.
  • SD bootloader customized for Aakar Brainboard allows drag and drop firmware upgrades.
  • Runs the highly-modular Smoothieware firmware.
Stepper drivers
  • 3 to 5 Allegro A4983 or DRV8825 stepper driver modules.
  • Each capable of driving bipolar steppers up to 35V and 2A(DRV8825).
  • Microstepping control of individual stepper to give greater flexibility.
Power inputs
  • True single input power operation by configuring jumpers(by default jupers are configured in this state).
  • Main 12-24V (Stepper drivers ) power can be connected using a 5mm screw terminal or standard 2x2 ATX CPU power connector.
  • 5V input can be taken directly from the USB cable or supplied by a 5V switching regulator installed on the board.
  • Series fused input for heated bed MOSFET with seperate power input.
  • Regulated 12V and regulated 5V headers.
  • 1 SPI connector with selectable 3.3V or 5V vcc.
  • 1 SPI/UART connector with selectable 3.3V or 5V vcc
  • 1 I2C connector with selectable 3.3V or 5V pull-ups and vcc.
  • 1 I2C/UART connector with selectable 3.3V or 5V vcc.
  • 1 UART connector FTDI cable compatible pinout.
  • All GPIO pins broken out on headers.
  • 4 LEDs.
  • Stepper signal pins are broken out for connection external stepper drivcers.
  • Serial graphic LCD panel with rotary encoder or push button control panel, many connectivity options.
  • Dimensions are 110x150mm.
Aakar website:

3D printed robotic arm controlled by FRDM-KL25Z MCU

3D printed robotic arms seem to be very popular projects to develop. Here is a new one controlled by FRDM-KL25Z MCU and powered by stepper motors.

It was dsigned and made by user "madivak" for his undergraduate level course. Hopefully he releases the files to the public.

Video of the arm moving:

Project homepage:

Here is another video with author and robot in action:

Presentation day, robotics unleashed.
Alexx Makau mazoeano uwache... u should quit photography u r very BAD at it, focus on what u r good at.. we all know what that is..hehheh AFRICA with robotics. Full details at DIY 3D Printing Freescale Semiconductor Robotic Arm
Posted by Madiva Graf on Tuesday, April 28, 2015

To see more powerful 3d printed robotic arm look at:

Alligator is new powerful open source control unit for your 3d printer or CNC

Alligator board is a new powerful electronic control unit for your 3d printer or similar CNC device. You can get it for 120 euro on their Indiegogo fundraiser.

Learn more about Alligator board or get your own unit at:

Best of all: Alligator is open source hardware!

Alligator Board Repetier Firmware on Github

Overview of Alligator versus other boards:

Autodesk Ember SLA 3d printer review and maintenance by Adafuit

Ruiz brothers from Adafruit did a very useful review and operations manual for Autodesk Ember SLA 3d printer. They go trough many aspect of it including basic maintenance and Hall sensor troubleshooting.

Basic review of Ember:

More detailed guide, operations manual and usage tips:

Here is a very detailed guide on how to use Ember, basic maintenance and even how to repair the Hall sensor so you can align the printer:

Here are some guides on how to hack Autodesk Ember.

Always wear gloves when working with resin

How to use inductive distance sensor and Mk3 aluminum hotbed for automatic bed leveling

3D Proto, creator of dual parking extruder, made an excellent video about how to install and use inductive distance sensor with Mk3 aluminum hot bed. This combination enables you to reach much better quality of ABS prints. With inductive distance sensor bed leveling you can:
  • Save lot of time by not having to have to mess with springs and screws on your print bed. Run the auto leveling routine before every print or just one time for each start-up of the printer.
  • Less issues related to non level print beds like parts coming up on one corner and nozzles jamming because the print started too close.
Inductive distance sensors are very cheap so it makes me wonder why are they not used by more 3d printers for automatic bed leveling?
If you wont to see full guide on how to install and use it with Marlin go to:

Inductive distance sensor on the extruder paired to Marlin firmware constantly corrects the distance to print surface

Diagram showing how to connect inductive distance sensor to control unit ie. Ramps

Combined with Mk3 Alu heated bed gives much better ABS prints like in this example where you can see very strait walls

Here is the video guide:


Here is a detailed guide by Tech2C YT channel on inductive sensor probes and various settings with measurements with multi-meter:

Mar 25, 2015

How to copyright your 3d printed work

Copyright is one of the most important issues of our age. Do you know how to use it to protect your 3d printing work? What can be copyrighted? What can you licence on a 3d object?

Here is an excellent White Paper guide written by Michael Weinberg on how to licence elements of your 3d printed / 3d printable object. It is a must read for anyone dealing with 3d printing and design!

Here is an short overview from the document:
A Three-Step Process In order to understand what it is you are licensing, this paper proposes a three-step process:
Figure out which elements of your object or object file are eligible for copyright protection
This can be much harder in the world of physical objects than it is with exclusively digital works. Unlike with code or photographs, with physical objects you may actually have to search out what parts are and are not protected by copyright. You may also need to make a distinction between the object and the file that represents the object—something that rarely occurs in the more traditional copyright world. While this can be complicated, this paper will try to make it as intuitive and straightforward as possible.

Understand what copyright does—and does not—allow you to control

Although it sometimes can feel otherwise, a copyright that protects a work does not control every use of that work.1 Understanding what your copyright allows you to control— and what remains out of your control—is critical to thinking about how to license things. For example, you may have a copyright on a file that represents an object, but not on the object itself. In that case, you should be clear-eyed about the fact that even the most restrictive license on the file will not stop people from reproducing the object without your permission.

Choose your license

After you understand what parts of your work are protected by copyright, and what that copyright protections actually mean, it is time to think about licensing. Once you understand what you have the legal right to control, you can start deciding how you want to exercise that control. This Paper is Only About Copyright Your 3D object might be protected by more than copyright. It could be protected by patent, or by trademark.

So why is this paper only about copyright?

Mostly because copyright protection is free. If you create something that is eligible for copyright protection, it automatically gets copyright protection free of charge. There are good reasons to register your copyright, but registration is not required for protection. This means that you get a copyright without ever filling out paperwork, consulting a lawyer, or even wanting it in the first place

Here you can download the entire guide in PDF format:

This White Paper was published by Public Knowledge on March 06, 2015: Public Knowledge is a non-profit Washington, D.C.-based public interest group that is involved in intellectual property law, competition, and choice in the digital marketplace, and an open standards/end-to-end internet.

Only issue that needs further clarification is how 3d printing copyright works in international environment. You create a 3d object in one country, publish it on a repository in second county, someone in third country downloads it and does something against your licence...

Here are some guidelines for patent research:

Mar 22, 2015

Photo log of 3d printing fully functional mechanical keyboard

Redditor wildpanic posted his build log on /r/3dprinting about his making of fully functional 3d printed mechanical keyboard.
It is printed from two parts due to print surface limitations but the end result looks great!

Here is the full photo build log:

Full Reddit thread about this keyboard is here:

If you are more interested in chorded keyboard that is more compact and will earn you some serious geek points take a look at:

How to upgrade early Printrbot Simple from fishing line to belt drive

If you own an early version of wooden Printrbot Simple from 2013 / 2014 that is powered by Kevlar fishing line you may want to upgrade it to belt drive.
Jason Bowling made a very detailed guide on the entire process that will upgrade you small Printrbot. Kudos Jason!

Detailed guide with pictures:

How to fit nuts and bolts into 3d printed parts with heat

Here is a short video showing the process of fitting a nut and threaded rod into a 3d printed part that doesn't fit. Basically the nut is heated and melted into the part.
The is no problem that can not be solved by applying some force to it :-)

Thnx Kris S for sharing it!

3d printed RC boats are lot of fun!

This looks like sooooo much fun! Am I right or am I right?

LitePlacer DIY pick and place machine with camera guidance

Juha Kuusama developed a DIY pick-and-place machine inspired by Shapeoko CNC router. It is fully functional with computer vision / camera effector guidance, BOM import and precise enough to place 0402 parts with the vacuum head.

It is still not rough enough to take full production quantities but is more suited for small series of PCBs at 200-400 components per hour. The accuracy is limited and it can not yet do 0201s.

Very impressive video introduction and demonstration:

Here is the project homepage where you can get all the plans and custom software or buy a kit for 1199 euro:

if you want to build it yourself, guide is at:

LitePlacer hardware is licensed under Attribution-NonCommercial 4.0 International License.

If you are interested in PCB manufacturing also check: FirePick 300USD DIY Delta pick-and-place or how to hack your 3d printer into solder paste dispenser.

Mar 20, 2015

TwinTeeth home manufacturing PCB factory mulitool with 3d printer

There are more and more home manufacturing tools and TwinTeeth is one of the more developed I saw.
It is a multitool reversed Delta machine mainly orientated towards PCB manufacturing but it can serve as 3d printer also. It is fully open sourced with plans so you can easily build it yourself or customize it to your needs. True ability for distributed manufacturing.

It has following functions and exchangeable tool options:
  • UV Laser photoengraving on sensitive film or pre-sensitized boards using an ultraviolet laser.
  • Drilling vias and holes using any mini-rotary tool like Dremel® or Proxxon®.
  • Dispensing solder paste with precision on SMD PCB pads.
  • Plotting circuits with a permanent pen-maker
  • 3D printing knobs, casings, front-panels, even print circuits with conductive filament, or make circuits supports.
  • Milling/Carving soft materials or etching PCB copper with a v-bit (if you prefer this etching method).
TwinTeet core inverse Delta and replaceable toolheads in front of it

Here is a video of it in action:

TwinTeeth technical specifications from the project page:
  • Working area (X,Y,Z): 70x80x60mm reduced considerably to an “Arduino™ shield-size” because it's preferred to do something small but precise. Users rarely create big circuit boards and reducing the working area has some benefits: the robot is cheaper, more precise, more robust, smaller and more manageable. However, it’s scalable, so you can make it bigger if you want.
  • Motion: TwinTeeth is powered by three Nema 17 motors, lead-screws and anti-backlash nuts.
  • Speed: it can go as fast as 1200-1500mm/min.
  • Code: it supports G-Code, postscript and BMP files. Eagle CadSoft can export to postscript format very easily. Support BMP files means than in addition to PCBs it can also print and etch photos on copper, alu or bronze.
  • Laser: using the same PHR-803T optical pickup than DiyouPCB with a wavelength of 405nm.
  • Rastering: the robot draws the PCB circuits in rastering mode in a similar way any paper printer does: moving the laser (or the bed in our case) from one side of the printer to the other.
  • Resolution: In rastering mode it's printing at 600DPI resolution. The laser beam spot is approx. 0.04 wide when is focused. Incredibly thin! Theorically mechanical precision is 0.94um.
  • Auto bed-levelling – it keeps the bed flat with a tolerance of less than 0.01mm while the robot is moving. It’s very important to improve printing quality and provide precision.
  • Auto-Focus: - small focus differences on the PCB surface affect printing quality so implemented a robust focusing system which takes some points on the PCB and extrapolates the results with a bilinear equation. With that info the robot adjusts the focus automatically while printing.
  • Infrared focusing: the auto-focus system uses an infrared laser to avoid film blurring. Films or presensitized boards are only sensible to ultraviolet light.
  • Electronics – using the well known combination of Arduino™ Mega + RAMPS 1.4 + A4988 Motor Drivers. Improved the Pickup Driver Circuit developed for DiyouPCB and now it includes new features.
  • Precision fixture bed – it is very important to keep the PCB fixed to the bed while the robot is moving. Also, when printing two-sided PCBs you have to be sure that both sides are correctly aligned. TwinTeeth includes a precision aluminium fixture bed and dowel pins which allow correct fixing and positioning of the PCBs. A stencil is also included which helps to drill the PCB’s 4-positions holes.
  • Camera – included a small USB camera because it is difficult to see tiny details on high-density PCBs. The camera is also useful to set the home position which is very important to obtain accuracy.
  • 3D Printing:  FFF (Fused Filament Fabrication) with 1.75mm PLA/ABS and a 0.35mm extrusion nozzle. Printing quality is similar to any 3D printer you can find in the market.
TwinTeeth software:
  • TwinTeeth Firmware: deeply modified Marlin firmware to support multiple tools, manage and control the laser, implement the auto-focus system, print in rastering mode, improve the buffering, and much more.
  • TwinTeeth Management Console – TwinTeeth comes with a new easy-to-use management console which includes functionality specially designed for the multi-tool environment. Included functions to calibrate the printer, move the axis (jogging), and adjust the parameters of each tool. This software communicates with the robot through an USB 2.0 port.
  • TwinTeeth Eagle ULPs – developed some ULPs (Eagles’s user language programs) to generate the drilling and paste dispensing g-code files. You can also use the files generated by other ULPs like PCBCode.
  • Eagle Cadsoft – It is a popular electronic CAD software company. They provide a freeware version for non-commercial use. It easily generates the postscript, drilling and solder paste dispensing files which TwinTeeth uses to make the circuits.
  • 3D Slicing software– for 3D printing you can use any slicer software like Slic3R or Cura.

TwinTeeth homepage:

Since it is an open source project you can get all the files to make it here and start your own home PCB factory:

How to build the cheapest DLP SLA 3d printer for under 500$ including projector

This is probably the cheapest DLP SLA 3D printer that you can build yourself for some 500 USD including the projector!

"Little Dipper" has a simple design that anyone can replicate with some basic DIY skills and it makes prints with reasonable quality.
The most expenisve par is the projector which you can get dfor some 350 USd new, but you could probably get it used somewhere. Other parts include simple z axis movement (screw or belt driven) on wood frame and Ramps 1.4 or Arduino controlled electronics.

Simple plastic vat and z axis screw drive

Objects 3d printed on Little Dipper

Objects 3d printed on Little Dipper. You can see the layers, but the quality is still great for the price.

Objects 3d printed on Little Dipper

Little Dipper DIY DLP Sla 3d printer. You can see all the elements with DLP projector on top.

Here is the project description from the makers:

How it works?
A DLP projector is used to cure UV setting resin one layer at a time while a moving axis drops incrementally into the vat of resin. A projected slice cures each layer and builds the part. This style of resin printer is different from a FormLabs 3D printer and some others in two ways.
  1. It uses a DLP projector rather than a laser to cure each layer.
  2. It shines the light source from the top rather than up from the bottom.
Advantages over laser based bottom up and DLP bottom up designs:
  • Simplicity
  • Lower start-up cost
  • Modifiable to bottom up
  • Fast build (~1 evening)
Major Components and Materials:

DLP projector

There are 2 known choices, although others may work.
  1. Acer P1283 DLP Projector
  2. Acer H6510BD DLP HD projector
Linear Slide/Axis

Almost any linear axis that is belt driven or screw driven will work. Project uses a minimal version of this:
A more budget minded and adventurous person could even choose a drawer slide, but you may find that rigidity and smooth sliding in the z-axis will be a useful feature.

4x4 sheet of 1/2in MDF or equivalent material and hardware

The version shown here is as simple as it gets. 2 pices of MDF cut to provide a mount for the axis, projector and stable footing for the machine. Pretty much any kind of enclosure can be designed for this 3D printer. Your main objective is frame rigidity and ambient light blocking.

Ramps 1.4 or Arduino based electronics capable of running at least (1) nema 17 stepper motor
This build features a RAMPS 1.4 board, stepper drivers and an Arduino Mega 2650 with standard Sprinter firmware. There are some basic modifications needed depending on the hardware you choose. None of these modifications constitute needing to know anything in-depth about programming. The firmware used is modified for 5/16 standard threaded rod and has end-stops disabled. You can modify this firmware using the Arduino environment to further suit your needs.

UV Resin, are the two most seemingly popular and affordable options for UV resin suitable for DIY resin printers such as the one featured in this build. This build has been tested with G+ from Makerjuice. Funtodoo, Form1+ and Spark/Ember resin formulations are likely suitable.

Build Platform and Plastic Tupperware vat

This build includes plans for a build platform that fits a specific set of Tupperware available at "wallyworld". The benefit to the type chosen in this build is that you get a variety of sizes that scale easily, so that extensive design modifications are not needed. You will also need additional containers for post-cure/clean up of your resin parts.

Control Software and Slicer

Creation workshop is used to control and slice 3D models. Download Creation Workshop here.

Here is Instructables page of a project with detailed build guide, software and everything nneded to build it:

This project was developed by Instructables user "marshallpeck". Kudos to you sir! You can also see more at: or .

All the recent developments in SLA 3d printing make me think that it is the future for home and hobby 3d printing. We need more affordable resin materials and more low cost parts.


Thanks to Reddit commentator "Panaetius" here is a link where you can start to research on how to hack or prepare a DLP projector for using it for SLA 3d printing. It describes basic concepts and example of modifications to color wheel focus / lens mechanism and UV filters.


Chimera is even cheaper SLA DLP machine made from second-hand and scrpa parts for under 60USD:

Mar 17, 2015

Making a DIY induction heated extruder for your 3D printer

Standard extruders are heated by simple resistive heaters and you basically need to push enough 12 or 24 V DC electric current through a resistor and simple MOSFET.

Induction heated extruders would have many advantages over them: faster heating up, no high temperature insulation is needed and less thermal mass. All of this could make induction heaters light and fast.
The main disadvantage is the more complex electric circuits needed to power it and more complex control unit since it is using much higher voltage and hundreds of kHz AC.

Based on a paper on induction nozzles for 3d printing standard FDM nozzles have several problems:

  • Slow convergence to desired steady state temperature at extruder tip, (many seconds, up to several minutes) and 
  • slow feedback loop for temperature control, (from 100's of ms to s) 
  • Lack of fine-grain temperature control at extruder tip, in steady state, the entire metal nozzle is essentially soaked too, or near, the melting temperature. 
  • Inconsistent feeder response due to varying liquid plastic volume near tip and 
  • limits on filament and extruded plastic drop size 

The extruder tip with inductive heating coil would be physically similar in appearance, but would have several distinct differences:

  • Rather than a metal nozzle, it would be made of a thermally insulating, nonconductive material such as glass or boron nitride. 
  • The actual heated element would be buried inside the tip to make direct contact with the plastic 
  • The power for heating is transferred through electromagnetic coupling of a driving coil to the heated element. The heated element, (and the molten plastic around it), are thermally isolated from the rest of the extruder. 
  • By using inductive heating and passive, digital temperature sensing of the heating target at the nozzle tip, significant improvements can be made to the issues above, resulting in a faster production of more isotropic/mechanically stronger plastic prototypes. Also, the above problems typically put a limit on usable filament size, something this system should be able to surpass. 

Here is the comparison of resistive heated extruder vs. induction heated extruder:

Resistive compared to inductive heated extruder head, schematics made by aka47

RepRap builder SB made a post about his induction heated extruder, here is his work and schematics:

Induction heated extruder, you can clearly see the induction coils

The induction coil heats the sleeve made from mild steel (ferromagnetic) while the stainless steel is not heated directly because it is not ferromagnetic.

The electronics schematics are not yet available.

You can get more details here:

To get more information on induction heating you can also check related project of induction heated solder iron:

First post about induction heated extruder on RepRap forum:,481721

more detailed forum thread:,55188,55262

GitHub repository with preliminary design, many useful materials and thesis work on induction heated extruders:

There are other people actively experimenting with this concept like Bulent, who made the extruder and posted a YT video of it working (his videos are not in English, but you will get some insight):

Here is a video showing more details, but again language is not English:

Here is a Reddit thread on an attempt to make one:

Here is a working DIY induction extruder from Japan made by "Y Ogawa". He used a modified 3020 CNC machine to move the print head.

Here is the project homepage in Japanese:

As someone noticed in the comments, it would be interesting to see the induction extuder based on filament with metal particles where induction heats the filament itself. Then you could reduce the mass even further.

Another thing to mention is a possibility that the induction coil will interfere with nearby electronics and maybe emit noisy radio waves. It could also interact with build platform or other parts causing heating or melting damage.

If you want to build a serious desktop induction heater for the metal melting of larger pieces here is a link:

Inductive heated extruders are also being adopted on large scale for plastics industry with many benefits inefficiency and power saving:

Mar 16, 2015

Amazon wants to patent 3d printing delivery van

Amazon wants to patent 3d printing in the delivery vans. You order something and they print it in the delivery van driving towards you. It's probably a move in some grand corporate strategy of taking over the world, defensive patenting or preventative patenting. I will not even try to forecast implications of this ...

You can see their full patent application HERE.

I always claimed that intellectual property / patent system is broken beyond repair and needs major reform.

All of this has been done in some form in the past:

Here are some pictures form the patent application:

3D Hubs accepts Bitcoin!

3D Hubs, a local 3D printing service now accepts payments in bitcoin! This is a major step forward to truly decentralized manufacturing economy!

From their press release:

Amsterdam, March 9, 2015
Bitcoin gets physical with 3D Hubs  

Bitcoin payment service provider BitPay, and 3D Hubs, the world’s largest network of 3D printers, have just announced a collaboration that will integrate bitcoin payments through Adyen into 3D Hubs’ network of over 13,000 privately owned 3D printers globally.

The partnership follows the recent news of Adyen’s integration of bitcoin. 3D Hubs, ​the Airbnb for 3D Printers, ​ is on a mission to make 3D printing accessible to everyone by connecting all the world’s 3D printers. The 3D Hubs model decentralizes production and promotes sustainability by eliminating the need for long­distance shipping. ​Today, the 3D Hubs network is providing over one billion people with access to a 3D printer within 10 miles of their home. 3D printing began in the early 80s as a form of rapid prototyping. 

The original 3D printer, invented by Chuck Hull, involved using UV beams to solidify layers of liquid photopolymer in a vat. Since then, 3D printing has rapidly evolved, and 3D printers can now create products in a whole range of materials including plastics, resins, metals, ceramics, and even food. In fact, you can now create just about anything you can dream of. 

This partnership connects bitcoin ­ a decentralized currency ­ to 3D Hubs’ decentralized manufacturing network, further strengthening the global movement towards decentralized industry.

Mar 13, 2015

Machinable wax 3d printing filament for lost wax metal casting

YT user aonemarine made this video review of Machinable wax 3d printing filament made specially for lost wax casting. You print the object you want in wax, make a mold and melt the wax away to poor molten metal in it.
The lost PLA casting method is well known but it needs much higher temperatures to melt the PLA away. Wax is much easier to work with.
There have been some wax-like filaments and resins but there is still no wax filament solution that is well established. Maybe this will be the one.

Here is the video describing the wax:

Here is the video tutorial on how to cast metal with it (wax investment casting):

He uses the wax filament made by

Mar 11, 2015

WASP rotating mixing clay and straw extruder for 3d printing houses

Italian 3d printer company WASP presented a novel extruder for big machines that will 3d print houses in the future. Their clay extruder has a sieve and mixing auger and rotates as it deposits building material that can be sourced locally in poor countries.

Here is the project description:
Massimo Moretti and his collaborators don’t forget their main focus: to build 3D printed houses with a very low cost, expecially in developing counties. Now here we are to the turning point: WASP exhibit for the first time at 3D Print Hub in Milan the new extruder, completely redesigned, a rotating extruder.
It is a small revolution. Advantages are several. This kind of system require little energy, it cleans by itself, it can be assembled and disassembled in a very few time, it has a costant speed control. These technical solutions can be transposed in a bigger scale. This is the reason because WASP team consider this transition as crucial in 12 meters tall 3D print building, which is in progress. WASP will give very soon more details about this new fronteer, which has been reached thanks to the constant research.

Here are the videos of extruder and Wasp large clay delta making house parts:

Here is a video of the extruder printing with long straw fibers to give more strength:

Source in Italian:

How to install simple and effective automatic bed leveling

GuruBrew has published this excellent video tutorial on how to make your own automatic print bed leveling.
It looks easy and it will help you with your calibration and improve print quality. It takes a normally closed micro switch and a small RC servo, customized Marlin firmware and 3d printed probe mechanism.

Here is the video guide:

Thank you for sharing Guru!

Youmagine releases 3DPL Open Source License for 3D Printed things

YouMagine is a huge 3d model repository and 3d printing community and  they have take a huge step by releasing their open source license: the 3DLP.
They have community to participate with their ideas and suggestion in finalizing the license, so go and do your duty netizen!

You can read the 3DLP license here:

What are some interesting things about the 3DPL?
  • The design must always be attributed.
  • All subsequent derivatives of a shared file must be available for remix and sharing.
  • If the creator requires that you include reference to be printed on or in the physical printed object, such as a logo or name, you have to respect that and are not allowed to remove that reference without the creator’s approval.
  • If one doesn’t abide by the terms of the license the rights granted under the 3DPL will be terminated immediately.
  • If you fail to comply with the license such as selling a work that was meant to be non-commercial then you must pay the creator 3 times the gross revenue you made on the sale.
  • Arbitration for conflicts between parties is arranged for in accordance with the WIPO Expert Determination Rules.
Youmagine has 3 license types:
  • REMIX: With a REMIX license your derivative work must be available to remix and share by others.
  • REMIX — NON COM A REMIX — NON COM license restricts the use of the Design File, the modified Design File and any Designed Product to non-commercial use only. The Design File, the Modified Design File or any Designed Product may not be used with the intent of making money directly or indirectly from it.
  • REMIX — RIGHTS MELT REMIX — NON COM for 12 months melting down to REMIX after 12 months. With a REMIX — RIGHTS MELT license your design file is available as a non-commercial share-alike file for 12 months. After this period the license will automatically become REMIX.
Learn more on Youmagine blog where you can also get involved in community development process:

This makes me even bigger fan of YouMagine and hopeful for the future of intellectual property rights issues in 3d printing arena.

Autodesk makes their Ember PR48 resin open source

In an unusual move for such big corporation Autodesk has made their PR48 resin recipe open source.
Kudos Autodesk! They even announced that they will make their Ember DLP 3d printer open source also.
It is licensed under

Here are the reasons for open sourcing it from the source webpage:
  • We have an open approach, and encourage the use of 3rd-party materials in our printer. We include 3rd-party materials in the defaults for Ember's online model preparation and slicer, and are adding more as we optimize their settings for Ember: you can check them out at (You don't actually need an Ember to use the site.) This Instructable describes how to test new resins:
  • Autodesk is thinking differently about 3D printing, and sharing under an license reflects our commitment.
  • Open sourcing our resin formulation is only the first step in the journey of opening our 3D printer and our Spark 3D printing platform.
Here are the ingredients:
  • Photoinitiator: 2,4,6-Trimethylbenzoyl-diphenyl-phosphineoxide (TPO) 0.40%
  • UV blocker: 2,2’-(2,5-thiophenediyl)bis(5-tert-butylbenzoxazole) (OB+) 0.16 %
  • Reactive diluent: Genomer 1122 19.89%
  • Oligomer: Ebecryl 8210 39.78%, Sartomer SR 494 39.77%
Are those ingredients even available for open sale?

You can learn more on Spark blog:

Huge moves in the industry ... will this Spark the  DLP 3d printers revolution?

Mar 8, 2015

Sardauscan is the cheapest DIY 3d scanner in the world

Sardauscan is probably the cheapest 3d scanner in the world and there is very little space to reduce the price.
You can build this 3d scanner for under 30 USD. It is controlled by cheap Chinese copy of Arduino Nano and you only need two USB ports on your computer to power it. The most expensive part is a Hercules HD Twist webcam.
The Sardauscan is developed by Fabio Ferretti from Belgium and it is open sourced! Great work Fabio!

All the files needed to build it yourself with some instructionscan be found at:

Software to run it (still under development) can be found at:

Detailed building guide on Instructables:

Here is the summary Bill Of Materials with estimated prices:
  • Bunch of M3 (16 and 20 mm)
  • Bunch of M4 (12 ans 20 mm)
  • 1x Chinese Arduino Nano (Chinese copy, 4$)
  • 1x Chinese Stepper Motor and controller (5$) 
  • 1-4x Line laser (2.5$ piece) 
  • 1x Hercules HD twist webcam (15$) 
  • 20x20 profile which can be printed: for example
  • Optional 3x 4mm roller (0.3$ piece)
  • Total estimated price: 26.5$ (1 laser) to 35$ (4 lasers)
Here is the software showing the scan results:

Mar 4, 2015

OpenHand 3d printable open source robotic hand is a strong and flexible gripper for you robot

3d printed robots are not toys anymore and very serious open source projects are emerging like strong DIY 3d printable robotic arm or small DIY robotic production cell.

We could see very soon home based robotic mini factories where robots, cnc machines, pick-and-place machines and 3d printers make anything you can imagine.

If you want to develop your own project you can use this robotic hand developed at Yale.

It comes in several configurations with different number of fingers. Finger grippers are made from different combinations of flexible and hard materials moved by fiber tendons. The resulting movements show that it can manipulate many different types of objects.
OpenHand is an open source projects so all the files are available publicly even including a code to modify the design.

OpenHand in three finger configuration

Here are some videos of different OpenHand versions manipulating objects:

In this video they show Hybrid Deposition Manufacturing (HDM) production process of OpenHand components where different materials are used to create object with functional properties. The process is easily replicated at home workshop:

Here is a OpenHand page:

OpenHand GitHub repository:

More extensive PDF document with many technical details on OpenHand:

PDF paper on Hybrid Deposition Manufacturing, a must-read if you want to recreate similar robotic hands:

Mini Metal Maker is ready to go to production

Mini Metal Maker is a small metal clay 3d printer developed by David and Lindsay Hartkop. It extrudes special metal clay which is then air dried and fired in a kiln to get metal objects. Ideal for jewelry makers and other small fine metal specialists.
The first version of Mini Metal Maker had a very successful Indiegogo campaign in 2013. Now the new version if fully matured and is on Indiegogo again to move the production of the machines from their home to real factory..
They have developed it from a wooden proof-of-concept to a sturdy production-ready machine ready for this specific metal clay 3d printing market.

Technical specifications:
  • the print bed currently allows for prints up to a 3.15 in cube (8 x 8 x 8 cm)
  • XY resolution: 10 microns
  • Z resolution: 2 microns
  • Extrusion resolution: 250 micron traces with 22 ga. nozzle
  • 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 to 1550˚F(600˚C-900˚C) in a kiln, the binder burns away as the metal particles fuse together.
  • The Mini Metal Maker measures 9 in wide, 12 in deep, and 18 in tall (23 cm x 30 cm x 46 cm) 
  • Electronics / software: Arduino Duo with modified open source Sprinter firmware
  • USB port
  • Price: starting from 2100 USD on Indiegogo

Bronze metal parts for ReRap Wades extruder

Here is a well produced presentation video:

Go and check their Indigogo campaign:

Mar 3, 2015

ExtrusionBot EB2 modular and fast filament extruder with cruncher and spooling modules

ExtrusionBot has new flagship filament extruder model: the EB2. It features high extrusion speeds at 6,5 feet per minute and modules that can be attached to it like cruncher that will shred 3d printed objects for recycling into new filament and spool winder.

Technical specifications:
  • automated touchscreen user interface
  • expanded materials (Nylon, HDPE, LDPE, HIPS, PET, plus ABS and PLA)
  • filament cooling mechanism
  • universal power adapter
  • embedded pellet hopper
  • 2 USB ports for smart module attachment
  • Price: 899 USD

Spooler module will ensure that the extruded filament is properly coiled up

Cruncher module will crunch your failed or unwanted 3d printed objects and make new filament from them

ExtrusionBot EB2 homepage:

Here is a video of Cruncher module destroying plastic clamshell packaging.


Finally something useful you can make with them.

If this is too expensive for you and you have some mAd Sk1Lz you can build your own filament factory:

Eucl3d will 3d print your Kerbal space ship

You are a huge fan of Kerbal Space Program? You already made your 3d printed Kerbal controller? You want to 3d print your ship? No problem! Just upload your .craft file and Eucl3d will do the rest ...
I don't know what is the price but it looks cool!

Link to the service:

3d printed extruder for continuous clay shapes

Scot A. Brown published a post on 3d printed rotational extruder "Rotruder" that produces continuous stream of clay objects. The rotating parts of the extruder form a mold when they are closing together.
Interesting concept and example of mold+extruder being made by with 3d printed parts. I think it could be used with other pasty materials or even food.
I have not found any design or technical documentation.It would be interesting to see the mechanism of power transmission that turns the six mold wheels.


here are some files to make it on GrabCAD:

How to remotly control ATX power supply modes with Raspberry Pi and OctoPrint

Standard ATX power supply unites are widely used to give electricity to 3d printers. Instructables user "mfoster" published a very useful tutorial on how to use RasPi and Octoprint to remotely control ATX power supply and enable you to put it in different power modes like standby mode.
The hack is easy to perform even by novice users, you need do use some code and conect some wires from Raspberry Pi GPIOs to ATX wiring.

Detailed instructions and the code can be found here: