Nov 25, 2017

3D Printed DIY Arrowheads by Juleah

Making your own archery equipment is one of the essential skills any archer should master. Here is a cool and useful DIY project made by Juleah, where she used a 3d printer to make printable arrowheads or field points.


Here you can see two videos detailing the entire target testing and improvement process:





The final version of horizontally printed points is strong enough to go through soft hay targets.








You can find out more about Juleah and her work at:

http://bestjuleah.pen.io

STLs for the field points can be downloaded via the LBRY.io application:

lbry://@BestJuleah#66bdae2ef9d62e812731b9dfca33e966771592b4/3d-print-arrowhead-stl

(LBRY is for the users who prefer open-source decentralized content distribution)

Or, if you prefer corporate controlled site, on Thingiverse:

https://www.thingiverse.com/thing:2663794




Oct 15, 2017

Decentralize your DIY projects with LBRY

If you consider yourself a part of DIY or 3D printing community, you most certainly regularly look at other peoples projects or publish your own work on some platform like YouTube, Thingiverse or Instructables. There is an incredible amount of knowledge and value being contributed by users every day - but do they get the fair amount of value back from those platforms?

Since all of the biggest platforms are privately owned, what would happen if those companies decided to close them for any reason destroying all the content in the process? Or decided to charge you a fee for publishing your content or decided to remove your content for some arbitrary reason ... or got hacked ... there are many very negative outcome scenarios since there is too much power accumulated within a single point of failure. Currently, many YouTube creators in DIY space are faced with random demonetization and there have been major problems with Thingiverse in the past.

Is there an alternative? Looks like there is! It is a decentralized, open-sourced blockchain based system named LBRY (Library). With LBRY there is no middleman.

LBRY is best described as a content platform (YouTube or Thingiverse) that works similar to a BitTorrent network where each user downloads and re-publishes the content he viewed.


You can read the full description here:

https://lbry.io/faq/what-is-lbry


Or watch this short description video:



LBRY is currently a great platform for video creators who want to increase their reach, secure their presence, improve monetization and are not satisfied with YouTube policies and uncertainty due to demonetization or censorship. If you are an existing YT creator, there is a simple YT import procedure you can find here:

https://lbry.io/youtube


The application interface is simple and easy to use, here is a short overview by Wayne Beach:




In the future, there will also be a mobile app available.


LBRY is not only for video, you can also publish all your project files, code or any other digital format on the Library app. LBRY is open sourced, so it can be used in a variety of roles as a specialized platform. One current implementation is spee.ch website which "takes" the content from the LBRY chain and acts as a decentralized image hosting site. Any developer could use the technology and develop a web browser accessible Thingiverse alternative for 3d printing files.

Publishing .STL files is very easy, just click on the green "Publish" icon in top right corner:





Your content can be monetized with LBRY credits cryptocurrency or you can receive tips for your work. LBRY crypto can be exchanged on many exchanges for Bitcoin or the regular money.

Do keep in mind that LBRY is still under development with a constant stream of new improvements and features being added. I know that most of you are more than capable of using this type of software and even give some feedback to the developers to make it even better.

Now go and give LBRY a test run to distribute that great content you made!!! Sharing is caring!

https://lbry.io/


For more in-depth insight, have a look at this interview with LBRY CEO Jeremy Kauffman by Bryan Lunduke:


Sep 25, 2017

Thomas will show you how to fix your filament

He will also teach you how you can ruin it in the first place...


3D Printed Military Submersible

Engineers in ORNL made military’s first 3D-printed 30 feet long submersible hull made from carbon fiber composite material.
The Optionally Manned Technology Demonstrator is a prototype vessel that could be used to deploy divers, logistics capabilities, and sensors. It was made much cheaper and faster when compared with traditional manufacturing methods.

We don't need more weapons guys. We need more technology for permanent peace.





Source news release with more information:

https://energy.gov/eere/articles/navy-partnership-goes-new-depths-first-3d-printed-submersible

Sep 24, 2017

Two Great Surface Finishing Tutorials

I was researching YouTube to find some good surface finishing, smoothing and painting tutorials, here are the two good ones I found.


First one is from Jure Korber from Slovenia. He made this detailed tutorial and has some good tips like the using of wooden stick to hold the piece.





Second is from Commando Designs



Hopefully, you found them useful!

New Prusa I3 MK3 is Released!!!

The original Prusa I3 Mk2 is one of the best 3D printers currently available and it just got better with the new version: the MK3.
It features many improvements and cool upgrades that go beyond what many much more expensive machines have.

New features:
  • Filament sensor
  • Power Panic
  • RPM sensing fans and Noctua
  • Ambient thermistor and P.I.N.D.A 2 with thermistor
  • EINSY RAMBo motherboard
  • Trinamic2130 drivers with layer shift detection, faster and silent printing
  • New Y axis
  • Bondtech extruder
  • Magnetic MK52 Heatbed
  • Powder coated PEI spring steel print sheet
  • Ready for OctoPrint
It will be priced at $749


MK3 presentation video:










MK3 release post with all the details:

http://www.prusaprinters.org/original-prusa-i3-mk3-bloody-smart/



Cutting Acrylic with EleksMaker Laser on HyperCube 3D Printer

Chris from Tech2C YT channel made a video showing various settings on his EleksMaker 2.5w laser diode for cutting a 3mm Acrylic sheet. It is mounted on HyperCube 3D printer.
It is an interesting video if you want to go into lasing acrylic with a cheap laser diode and you want to learn something and save some experimentation time.







Tip from the comments: black acrylic is easiest to cut since it absorbs the most energy.

HyperCube 3D Printer/CNC on Thingiverse:

https://www.thingiverse.com/thing:1752766

DIY Multi Extrusion Tool Switching by Rolmie

Rolmie from Germany is developing a multi-extrusion tool changer suitable for many common 3d printers. Interesting project you may want to follow up.

Project description:

Single and dual extruder FDM printers are commonly available these days but machines with support for 3 or more hotends are still hard to find. The current approach to dual/multi extrusion is either a XY carriage moving multiple hotends or a single hotend with several filaments feeding into it (eg. E3D Cyclops, Diamond Hotend, Prusa i3 MK2 Multi Material).
Both designs have their own limitations with regard to scaleability. For the first it is size and weight of the carriage, the second requires all materials to be within a similar temperature range.
This design overcomes some of these limitations and requires only off the shelf components (pins, bushings, magnets), 3D printed parts and most importantly no additional motors, servos or other electrical components. Modification of most CoreXY/H-Bot style printers should be possible

Prototype video:




Project page:

https://hackaday.io/project/26053-tool-switching-multi-extrusion


Tool head making a contact with on of the extruders

Sep 23, 2017

3D Printable DIY Scuba Diving Thrusters

Someone developed low-cost 3d printable underwater thrusters for scuba diving. There is a full set of instructions and files available.


Tech specs:

  • 1.85 mph underwater speed! 
  • 20 minutes runtime. 
  • $153 for flying underwater at speed of 3 km/h
  • DT700 brushless motors: 2 pcs x $14
  • Kort nozzle for DT700: 2 pcs x $35
  • ESC speed controller at least 40A with BEC: $4
  • Servo tester: $5
  • Slide Potentiometer any from 5K to 30K Linear: $2
  • SLA battery 9Ah: 2 pcs x $22



Here are the thrusters in action:





Detailed construction guide and all the files:

http://www.instructables.com/id/Underwater-Wrist-Thruster-185-Mph/

Hackaday.io project page:

https://hackaday.io/project/27134-arm-underwater-thruster