Blog on ekunn - Grégoire Saunierhttps://ekunn.com/blog/Recent content in Blog on ekunn - Grégoire Saunierekunn - Grégoire Saunierhttps://ekunn.com/ogimage01.jpghttps://ekunn.com/ogimage01.jpgHugo -- 0.155.3en-us2005-2025 Grégoire Saunier. All the text is available under CC-BY-SA 4.0 licenseMon, 16 Feb 2026 18:54:00 +0000oozeBot preFlighthttps://ekunn.com/blog/2026/02/16/oozebot-preflight/Mon, 16 Feb 2026 18:54:00 +0000https://ekunn.com/blog/2026/02/16/oozebot-preflight/<p><a href="https://github.com/oozebot/preFlight">PreFlight</a> is a new open source slicer by <a href="https://oozebot.com">oozeBot</a> based on PrusaSlicer but with deep rework of its internal code.</p> <ul> <li>True 64 bit architecture</li> <li>G-Code processing in memory only</li> <li>Athena perimeter generator improving over Arachne</li> <li>Interlocking perimeters similar to brick layers</li> <li>Deeper RRF (RepRapFirmware) integration</li> <li>Physics-Based Time Estimation</li> <li>Improved paint-on for seams and supports</li> <li>Cooling fan early spin-up</li> <li>and many more &hellip;</li> </ul> <p>Links:</p>PreFlight is a new open source slicer by oozeBot based on PrusaSlicer but with deep rework of its internal code.

  • True 64 bit architecture
  • G-Code processing in memory only
  • Athena perimeter generator improving over Arachne
  • Interlocking perimeters similar to brick layers
  • Deeper RRF (RepRapFirmware) integration
  • Physics-Based Time Estimation
  • Improved paint-on for seams and supports
  • Cooling fan early spin-up
  • and many more …

Links:

Showcase of the Athena perimeter generator compared to Arachne. The perimeters are better filled and more regular.

Athena perimeter generator vs Arachne

Table comparing Brick Layers with interlocking perimeters. The mechanism of this new slicer is based on X/Y variations and over-extrusion to compress plastic between the voids while. Brick Layers is based on Z variation. It claims 5 to 15% strength increase.

Interlocking perimeters vs Brick Layers

Example showing different support type on the same part using the paint-on feature

Mixed support types on a single object

Source via Fabbaloo

]]>Animated Knotshttps://ekunn.com/blog/2026/02/07/animated-knots/Sat, 07 Feb 2026 11:49:58 +0000https://ekunn.com/blog/2026/02/07/animated-knots/<p><a href="https://www.animatedknots.com/">Animated Knots</a> is a handy website for learning how to tie a know through easy to understand animations. You can browse by activity type, such as Climbing or Boating, or by knot type, such as Quick Release or Stoppers. Obviously, it also includes the tie knots and bow tie.</p>Animated Knots is a handy website for learning how to tie a know through easy to understand animations. You can browse by activity type, such as Climbing or Boating, or by knot type, such as Quick Release or Stoppers. Obviously, it also includes the tie knots and bow tie.

Link: www.animatedknots.com

Source: via Camille Roux

]]>Buildlist.org, A Global Directory Of Manufacturershttps://ekunn.com/blog/2026/01/08/buildlist.org-a-global-directory-of-manufacturers/Thu, 08 Jan 2026 10:55:22 +0000https://ekunn.com/blog/2026/01/08/buildlist.org-a-global-directory-of-manufacturers/<p><a href="https://buildlist.org/">Buildlist.org</a> is a directory of on-demand manufacturers from around the world for your DIY projects. All of the selected manufacturers have an online quotation system that does not require you to create an account. It&rsquo;s handy for finding local manufacturers!</p>Buildlist.org is a directory of on-demand manufacturers from around the world for your DIY projects. All of the selected manufacturers have an online quotation system that does not require you to create an account. It’s handy for finding local manufacturers!

Link : https://buildlist.org

More info :

Source: via n-o-d-e.net

]]>Why Does PLA Filament Sometimes Snap Like Spaghetti?https://ekunn.com/blog/2025/11/26/why-does-pla-filament-sometimes-snap-like-spaghetti/Wed, 26 Nov 2025 17:40:57 +0000https://ekunn.com/blog/2025/11/26/why-does-pla-filament-sometimes-snap-like-spaghetti/<p>Have you ever had a spool of PLA filament that snap in your hand like uncooked spaghetti? Or perhaps the filament broke inside the PTFE tube? Why does this happen, and how can it be avoided?</p>Have you ever had a spool of PLA filament that snap in your hand like uncooked spaghetti? Or perhaps the filament broke inside the PTFE tube? Why does this happen, and how can it be avoided?

This is due to a phenomenon called strain crystalization. Some elastomers and polymers slowly crystallise1 under mechanical stress which makes them brittle. In other words, when you unspool a filament, you deform it from its natural shape, creating mechanical stress that causes the strain crystallisation. The filament becomes brittle and can then break more easily. This may happen more frequently at the end of the spool due to the smaller diameter.

An easy way to prevent this phenomenon is to keep the filament tightly wound on the spool, to retain its natural shape. This can be achieved by securing the spool with a strap or a clip that holds the filament close to its natural shape, with a locking mechanism that does not put excessive stress.

Note that drying the filament with a heater may help as the temperature will disrupt the crystallisation of its molecular structure, making it more irregular. This will cause the filament to reprogram its natural shape.

In the video below, at 16:37, Zack Freedman explains this phenomenon and suggests some solutions.

Cover image copyright: Zack Freedman

  1. Crystalization means that the molecular structure becomes more ordered. ↩︎

]]>DasFilament rPETG made From Film Productionhttps://ekunn.com/blog/2025/11/17/dasfilament-rpetg-made-from-film-production/Mon, 17 Nov 2025 18:47:06 +0000https://ekunn.com/blog/2025/11/17/dasfilament-rpetg-made-from-film-production/<p>DasFilament has launched a recycled PETG filament made from film production waste. This rPETG has the same properties as their standard PETG and has been specifically designed to produce unique colour changes. It is available in spools and refills.</p>DasFilament has launched a recycled PETG filament made from film production waste. This rPETG has the same properties as their standard PETG and has been specifically designed to produce unique colour changes. It is available in spools and refills.

DasFilament rPETG store link

A close up of a refill rPETG spool on white background. We can see the color changing from brown to black to violet.

The official annoucement translated:

“For a long time now, the waste that inevitably arises during film production has been a thorn in our side. We have now succeeded in recycling this waste and using it to produce filament that is of the same quality as our other filaments.
We design the production of rPETG in such a way that, instead of a uniform ‘colour paste’, unique colour changes are created.
We are starting with spools and refills in PETG (1.75 mm). The colours vary and are selected at random for shipping.”

A text in German with four spools in the background. Deepl translates the text in English as follows: 'For a long time now, the waste that inevitably arises during film production has been a thorn in our side. We have now succeeded in recycling this waste and using it to produce filament that is of the same quality as our other filaments.'
A text in German with a column of rPETG spools in the background. Deepl translates the text in English as follows: 'We design the production of rPETG in such a way that, instead of a uniform 'colour paste', unique colour changes are created. We are starting with spools and refills in PETG (1.75 mm). The colours vary and are selected at random for shipping.'

Source: via x.com/dasfilament_de

]]>Moulding with an on-demand shapehttps://ekunn.com/blog/2025/11/10/moulding-with-an-on-demand-shape/Mon, 10 Nov 2025 08:52:50 +0000https://ekunn.com/blog/2025/11/10/moulding-with-an-on-demand-shape/<p><a href="https://fyous.com/">Fyous</a> has developed a PolyMorphic Moulding Machine that uses thousands of pins and a membrane to create mould shapes on demand.</p> <div class="youtubeDiv"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube-nocookie.com/embed/zoKRxQb84tI?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" title="YouTube video"></iframe> </div> <p>More info: <a href="https://fyous.com/">fyous.com</a></p> <hr> <p>Source: via <a href="https://www.core77.com/posts/139211/Incredible-Polymorphic-Molding-A-Mold-You-Can-Reset-Into-Any-Shape">Core77</a></p>Fyous has developed a PolyMorphic Moulding Machine that uses thousands of pins and a membrane to create mould shapes on demand.

More info: fyous.com

Source: via Core77

]]>A Classy Black Bear By Leger.https://ekunn.com/blog/2025/11/07/a-classy-black-bear-by-leger./Fri, 07 Nov 2025 16:45:08 +0000https://ekunn.com/blog/2025/11/07/a-classy-black-bear-by-leger./<p>A classy full black <a href="https://ekunn.com/projects/3d-printing/bear-frame">Bear</a> by Leger.</p> <figure class="galleryscroll-single-item"><img loading="lazy" src="https://ekunn.com/blog/2025/11/07/a-classy-black-bear-by-leger./black_bear_leger_hu_8fa602b51ce6e73a.jpg" alt="A Prusa MK3 3D printer that has been modified with a black Bear Upgrade frame and a Bondtech extruder. All printed parts are black. The printer stands on a wooden desk next to a window. A spool dryer is on the border of the window. The scene is classy and cosy."></figure>A classy full black Bear by Leger.

A Prusa MK3 3D printer that has been modified with a black Bear Upgrade frame and a Bondtech extruder. All printed parts are black. The printer stands on a wooden desk next to a window. A spool dryer is on the border of the window. The scene is classy and cosy.
]]>Palm Sized 3D Printerhttps://ekunn.com/blog/2025/11/06/palm-sized-3d-printer/Thu, 06 Nov 2025 09:25:44 +0000https://ekunn.com/blog/2025/11/06/palm-sized-3d-printer/<p>A super cute tiny FFF 3D printer by RobertGcode using <a href="https://e3d-online.com/products/roto-extruder">E3D Roto extruder</a>.</p> <div class="youtubeDiv"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube-nocookie.com/embed/JCcKdnAFfds?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" title="YouTube video"></iframe> </div> <hr> <p>Source: dwuk3d on Discord</p>A super cute tiny FFF 3D printer by RobertGcode using E3D Roto extruder.

Source: dwuk3d on Discord

]]>MakerCADhttps://ekunn.com/blog/2025/08/27/makercad/Wed, 27 Aug 2025 17:55:36 +0000https://ekunn.com/blog/2025/08/27/makercad/<p><a href="https://github.com/marcuswu/makercad">MakerCAD</a> by Marcus Wu is a new open source CAD software where you write code to create 3D objects.</p> <p>Unlike <a href="https://openscad.org/">OpenSCAD</a>, you can sketch on a surface and then &ldquo;extrude&rdquo; it in 3D. It&rsquo;s just like Autodesk Fusion but with code!</p>MakerCAD by Marcus Wu is a new open source CAD software where you write code to create 3D objects.

Unlike OpenSCAD, you can sketch on a surface and then “extrude” it in 3D. It’s just like Autodesk Fusion but with code!

You can export your model as STL or STEP and the code makes it easy to version your design with GIT.

The language used to write the geometries is Golang, meaning you can also use all the maths and functions that come with this language. Golang is also generally well appreciated.

Links:

I’m looking forward to see how MakerCAD evolve. Thank you to Marcus for all his hard work!

]]>Teufel Myndhttps://ekunn.com/blog/2025/07/26/teufel-mynd/Sat, 26 Jul 2025 02:57:11 +0000https://ekunn.com/blog/2025/07/26/teufel-mynd/<p>The Mynd is a commercial open source Bluetooth speaker from the German company Teufel Audio. It&rsquo;s a true open source product without false advertisement, the firmware is under MIT license and the native CAD files for the mechanics and electronics are available ♥️</p>The Mynd is a commercial open source Bluetooth speaker from the German company Teufel Audio. It’s a true open source product without false advertisement, the firmware is under MIT license and the native CAD files for the mechanics and electronics are available ♥️

Links:

Source: via hackaday.com

]]>Design the Perfect 3D Printed Cubehttps://ekunn.com/blog/2025/06/21/design-the-perfect-3d-printed-cube/Sat, 21 Jun 2025 18:14:26 +0000https://ekunn.com/blog/2025/06/21/design-the-perfect-3d-printed-cube/<p>A smart technique to design and print a perfect cube by <a href="https://www.slant3d.com/">Slant 3D</a>.</p> <div class="youtubeDiv"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube-nocookie.com/embed/3VUQd_Tl5x0?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" title="YouTube video"></iframe> </div> <p>Link: <a href="https://www.youtube.com/watch?v=3VUQd_Tl5x0">youtube.com/watch?v=3VUQd_Tl5x0</a></p>A smart technique to design and print a perfect cube by Slant 3D.

Link: youtube.com/watch?v=3VUQd_Tl5x0

]]>Cardboard Build Techniqueshttps://ekunn.com/blog/2025/06/20/cardboard-build-techniques/Fri, 20 Jun 2025 19:42:45 +0000https://ekunn.com/blog/2025/06/20/cardboard-build-techniques/<p>Ben from the YouTube channel NightHawkInLight has shared a very inspiring <a href="https://www.youtube.com/watch?v=45JhacvmXV8">video</a> about building objects out of cardboard.</p> <p>He presents a variety of techniques for joining, reinforcing, gluing and waterproofing cardboard.</p> <p>Drawing on his experience in chemistry, he also reveals how to make your own biodegradable glue and waterproofing product.</p>Ben from the YouTube channel NightHawkInLight has shared a very inspiring video about building objects out of cardboard.

He presents a variety of techniques for joining, reinforcing, gluing and waterproofing cardboard.

Drawing on his experience in chemistry, he also reveals how to make your own biodegradable glue and waterproofing product.

Source: Hackaday

]]>RepRap Is 17 Years Oldhttps://ekunn.com/blog/2025/05/29/reprap-is-17-years-old/Thu, 29 May 2025 23:35:47 +0000https://ekunn.com/blog/2025/05/29/reprap-is-17-years-old/<p>Wow time flies, RepRap is already 17 years old! Thank you Adrian and Vik, for your invention and all your hard work. 🙏🎁</p> <p><a href="https://bsky.app/profile/adrianbowyer.bsky.social/post/3lqdg6f5szs2c">Bluesky post from Adrian Bowyer about the 17th anniversary</a></p> <p><a href="https://reprap.org/wiki/About">About RepRap</a></p>Wow time flies, RepRap is already 17 years old! Thank you Adrian and Vik, for your invention and all your hard work. 🙏🎁

Bluesky post from Adrian Bowyer about the 17th anniversary

About RepRap

]]>Openbuilds goes out of businesshttps://ekunn.com/blog/2025/05/15/openbuilds-goes-out-of-business/Thu, 15 May 2025 00:00:00 +0000https://ekunn.com/blog/2025/05/15/openbuilds-goes-out-of-business/<p>Oh no, Openbuilds<sup>®</sup> goes out of business 😓</p> <p>The CEO Mark Carew <a href="https://us.openbuilds.com/press-release#:~:text=OpenBuilds%20Introduces%20V%2DSlot%20Extrusion%20System">invented the V-Slot</a><sup>®</sup> open source aluminum extrusion in 2013. The ingenious idea was to be able to convert it into a linear motion axis by adding V-Wheels. It&rsquo;s cheap, quiet and the 45° angle of the wheels provides a high contact surface with self-centering.</p>Oh no, Openbuilds® goes out of business 😓

The CEO Mark Carew invented the V-Slot® open source aluminum extrusion in 2013. The ingenious idea was to be able to convert it into a linear motion axis by adding V-Wheels. It’s cheap, quiet and the 45° angle of the wheels provides a high contact surface with self-centering.

20 by 20mm v-slot extrusion with a V-Wheel

Openbuilds V-Wheel on V-Slot (image by Openbuilds)

We use V-Slot on the Bear because the V-shape offers an easy alignment during the assembly and more flexibility for the printed parts (no support needed).

Openbuilds banner mentioning they go out of business and everything from the store must go

Everything must go: openbuilds.com

Their T-Nuts are one of the few quality V-slot compatible ones still on the market. They will be missed. We made custom high quality open source T-Nuts for the Bear but unfortunately none of our resellers still sell them.

Openbuilds T-Nuts

Openbuilds T-Nuts. (image by Openbuilds)

Furthermore, Openbuilds isn’t just a part store but also a friendly community full of creativity. A lot of projects have started there, including the Bear Upgrade frame! You can find CNC, 3D printers, lasers, artbot, vacuum forming machines and many more gems.

The open source nature of the V-Slot means we already have manufacturers producing them in EU and China. #vslotnotdead !

Thank you Openbuilds for what you have done for the open source community 🙏

openbuilds.com

]]>Beautiful Mechanical Inspirations by Maker's Musehttps://ekunn.com/blog/2025/05/08/beautiful-mechanical-inspirations-by-makers-muse/Thu, 08 May 2025 14:16:17 +0000https://ekunn.com/blog/2025/05/08/beautiful-mechanical-inspirations-by-makers-muse/<p>Maker&rsquo;s Muse has recently shared a list of beautiful mechanical sources for inspiration. Check his video</p> <div class="youtubeDiv"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube-nocookie.com/embed/WgOLTtANcuU?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" title="YouTube video"></iframe> </div> <p>Here are the links shared in his video:</p> <ul> <li>Ebook <a href="https://archive.org/details/fivehundredseven00browiala">507 Mechanical Movements</a></li> <li>Website <a href="https://507movements.com">507 Movements</a></li> <li>Ebook <a href="https://archive.org/details/fivehundredseven00browiala">The Engineers&rsquo; Sketch Book</a></li> <li>Ebooks Mechanisms In Modern Engineering Design <ul> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol1">Volume I</a></li> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol21">Volume II - Part 1</a></li> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol22">Volume II - Part 2</a></li> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol3">Volume III</a></li> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol4">Volume IV</a></li> <li><a href="https://archive.org/details/ArtobolevskyMechanismsInModernEngineeringDesignVol51">Volume V - Part 1</a></li> <li><a href="https://archive.org/details/mechanismsinmodernengineeringdesign-artobolevsky-v5-2">Volume V - Part 2</a></li> </ul> </li> <li>Youtube channel <a href="https://www.youtube.com/channel/UCli_RJkGWfZvw4IlDLHNCQg">thang010146</a></li> <li>Youtube channel <a href="https://www.youtube.com/channel/UCnRZLwW_lNycqY54XGqx2FA">S.CRAFT</a></li> <li>Youtube channel <a href="https://www.youtube.com/channel/UCSksodwjNeOQ3Oywr1G4Nag">Engineezy</a></li> </ul>Maker’s Muse has recently shared a list of beautiful mechanical sources for inspiration. Check his video

Here are the links shared in his video:

]]>