Greg Saunier

@gregsaunier

Bear Upgrades designer. I also share informative content on 3D printing and open source. #3dprinting #opensource #engineering #mechanical

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Greg Saunier@gregsaunier· 24d

A new OrcaSlicer fork with innovative solutions for printing in colors. It uses overhangs to hide a previous color and require a single tool change per layer, reducing time and waste. GitHub: github.com/sentientstar... YGK3D explain in detail how it works : www.youtube.com/watch?v=B5cv...

Vertical print of The Great Wave off Kanagawa, Katsushika Hokusai

Two colourful cats in colours with their right paw up. The left one has a patchwork style of colours while the right one has smooth vertical transitions of pink, yellow and blue with black patterns.

A detail of the right cat of the previous image where we can see overhangs dropping to make the color change.

Impressive jaguar in white, yellow and black. The white is transitioning a smoothly and the black is well contrasted. The belly looks great knowing it was printed with support. The tail is unfortunately missing, it has probably broken during the print

Greg Saunier@gregsaunier· May 25

Bondtech, E3D, Prusa and the Orbiter Project have now all patented high flow nozzles. This is honestly sad, we are blocked for 15+ years with those now. But they are (all) a pain to cold pull 🫢 Patents list in the next post ⤵️ #3dprinting #nozzle #speed #Bondtech #cht #Prusa #E3D #fuge #Orbiter

Screenshot of the Prusa patent showing several tubes with special internal shapes. The too ones have a C shape and others a dual cavity shape.

Page of the E3D Liquifier nozzle that has a squished tube shape similar to their recently announced FUGE technology

Page of the Orbiter Twist Flow nozzle showing half of the internal. It has a zigzag or a sinus wave shape.

Bondtech CHT nozzle patent page showing 4 different shapes from top view. Two have 3 holed and the others have dual cavity.

Greg Saunier@gregsaunier· May 17

I was reflecting on 3D printer motion algorithms and I remembered this image. Klipper uses trapezoidal, RRF & Marlin can do S-Curve and the new Prunt firmware can be even smoother! With input shaping we are prioritizing the wrong dev! ➡️ Read more on my blog: ekunn.com/blog/2026/05... #3dprinting

This is screenshot of a Trinamic video with beer glasses sliding back and forth. The screenshot is at the moment where the glasses stop and change direction. The top one has the top surface of the beer almost flat and correspond to a S-Curve algorithm. The bottom almost put beer out of the glass and correspond to trapezoidal algorithm.

Greg Saunier@gregsaunier· May 14

Screws look beautiful and I like to make them visible in products, but I have to admit that those hidden ones have some style too! It's based on a spring loaded mechanism and were invented by Jeff and Brandon Serle, who are cleanroom engineers. ➡️ flushfasteners.com #torx #fastener #screw #hidden

A large flat head screw where the torx hole is hidden but slightly visible. A blue glove with a tissue is cleaning it

A large flat screw on wooden surface similar to boat. The hidden torx hold is almost invisible.

Greg Saunier@gregsaunier· Mar 20

VOC calculator including detailed information by Heatforge3D : ➡️ heatforge3d.com/en/pages/3d-... Based on peer-reviewed research data on 3D printers VOC emission. #3dprinting #voc

The 3D printer calculator with 4 values to enter and a calculate button in red. Under the calculate buttons appears the result in ug/m3

Under the total VOC results we have a list of the emitted chemicals with their ug/m3.

Greg Saunier@gregsaunier· Feb 16

preFlight is a new open source slicer based on #PrusaSlicer but with deep rework of its internals. - Truely 64bit - GCode processing in memory - Athena algo improving over Arachne - Interlocking perimeters similar to brick layers - Deeper #RRF integration ➡️ github.com/oozebot/preF... #3dprinting

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

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.

Greg Saunier@gregsaunier· Feb 11

Really they are playing all possible silly games 👎 ➡️ github.com/OpenCommunit...

Screenshot of a Github issue comment saying:
I noticed on Printables that the license does not show the "Meets Open Definition" summary detail like almost every other license, presumably since it would be silly to show "✖ | Meets Open Definition" when selecting a license with "Open" in the name.

Greg Saunier@gregsaunier· Feb 11

And Prusa continues, so disrespectful 🤮. Flagged by so many people for their wrongdoing, yet they persist in trying to redefine open source for marketing purposes. Champions of open-source-washing! ➡️ The OCL isn't an open source license #3dprinting #opensource #prusa #disrespectful

Screenshot of a promotional email from printables.com that mention that the Core One is open source with to OCL license.

Later in the email they once again write in large bold font "Open-sourcing CORE One/L CAD Files".

Greg Saunier@gregsaunier· Dec 24

Thank you so much for all your comments, likes, talks and support ❤️ I wish you all a wonderful Christmas and a happy New Year. Take care of yourselves and your loved ones. 💫🎉🎁

Greg Saunier@gregsaunier· Dec 19

⚠️ FACT CHECKING : A licence with a non-commercial aspect cannot be considered as open source. Prusa is NOT open-sourcing the Core One. Prusa is misleading us once again. - OSI rule #1: opensource.org/osd - OSHWA rule #5: oshwa.org/resources/op... - Wikipedia: en.wikipedia.org/wiki/Open_so...

Screenshot of the start of the article from Josef Prusa with the misleading title: "Open-sourcing CORE One CAD Files Under the New Open Community License (OCL)". In the bottom of the screen shot we can see a simplified exploded view of the CORE One in orange on white and under the text " OPEN COMMUNITY LICENSE V1. 0".

Greg Saunier@gregsaunier· Nov 20

This is the internal design of the future E3D high speed nozzles, called the FUGE! Unlike the CHT ones, there is no more channelling. Instead, the filament core is warmed up by altering its path while maintaining the same surface area throughout. This is an application of the E3D patent from 2020.

A green printed part that represent a scaled up version of the inside of the FUGE nozzles. The filament path is flattened in the middle and get back to its circular shape.

Same printed part as the previous image but rotated 90° to see how flattened it is.

Greg Saunier@gregsaunier· Nov 17

DasFilament announced a recycled PETG filament made from waste of Film production. This rPETG has the same properties of their standard PETG and is specifically designed to have unique colour changes. Available in spools and refill. ➡️ www.dasfilament.de/filament-ref... #3dprinting #dasfilament

A refill spool of rPETG in the center of a white page with colour changing in the violet range. On top the title a title in black "Recyceltes PETG"

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

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."

Greg Saunier@gregsaunier· Nov 16

The resin 3D printing industry now benefits from a new and advanced open source UI called Orion. Developed by @openresin.org, it's currently running as a beta testing on the Athena II printer from Concept3D Systems Inc. ➡️ github.com/Open-Resin-A... #opensource

Screenshot of the Orion UI while printing a part. On the right we have a 3D view of the part with the progress percentage and on the left some information like the estimated print time. In the bottom we have two buttons, left one is "Options" and right one is "Pause".

Greg Saunier@gregsaunier· Nov 7

A classy full black Bear by Leger. #3dprinting #bear #bearupgrade #prusa

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.

Greg Saunier@gregsaunier· Aug 28

A great post from pt of @adafruit.com following a recent article in which Jo Prusa once again claimed that open source hardware in 3D printing is dead. Thank you @ptorrone.bsky.social ♥️ ➡️ xcancel.com/ptorrone/sta... #prusa #prusa3d #oshw #opensource #opensourcehardware

Screenshot of xcancel.com website that allows to see a X post entirely. Pt took one of the teaser written by Jo Prusa for a future product to try to address the constant attack of Prusa against open source.

Greg Saunier@gregsaunier· Jun 12

And now all Bear extruders are certified! 😎 ➡️ certification.oshwa.org/ch000026.html ➡️ certification.oshwa.org/ch000027.html

OSHWA certification ID logos next to each other. Left one is the BearExxa 1.0 with ID CH000026 and right one is BearExxa 2.0 with ID CH000027

Greg Saunier@gregsaunier· Jun 5

The Bear Upgrade Frame is now certified 😎 (better later than never) ➡️ certification.oshwa.org/ch000025.html #3dprinting #opensource #oshw #oshwa #prusa

OSHW certification ID CH000025 on a white background with all letters in black except the W in red

Greg Saunier@gregsaunier· May 30

The water has not passed over yet. Still hard to predict what will happen. Image source: lematin.ch

The lake level dangerously rising in Blatten. Many houses are under the water and there are lots of debris.

Greg Saunier@gregsaunier· May 29

The water level is rising by 90 cm per hour. :/

Aerial view of the Blatten village with the latest houses covered by water.

Greg Saunier@gregsaunier· Apr 12

New release of Klipper (version 0.13.0) : - New resonance testing for input shaping - New adaptive bed mesh leveling - Add new sensors (eddy current, load cell, accelerometer, hall, temperature) - Now support RP2350 microcontroller And many more here : www.klipper3d.org/Releases.html

Greg Saunier@gregsaunier· Apr 7

Don't try this

A jar of Ovaltine Crunchy Cream with a slice of bread spread.

Greg Saunier@gregsaunier· Mar 20

This is how I understand it: - blue: their new "servo" motor - yellow: the helical gear meshing with the "servo" motor gear. This is to drive the hobb gear - red: the mechanism that put one of the filament in contact with the hobb gear. Each idler/tensioner is moving the filament passing through

Marketing images of Bambu extruder with colored square and arrow to explain the mechanisms

Greg Saunier@gregsaunier· Mar 18

This? I thought about a DC motor too but to me it makes more sense if it's an optical encoder. But I can absolutely be wrong.

Zoom on the extruder and a square to show a tube-ish component in a blue square

Greg Saunier@gregsaunier· Mar 14

Here is an image of a rumoured Bambu Lab 3D printer. What we can see: - Single print head with dual hotends (similar to UltiMaker) - 350x320x325 build volume - AMS with temperature & humidity control - Swappable laser module - Tinted window on the right side Source: www.reddit.com/r/BambuLab/c...

A picture of a rumoured Bambu Lab 3d printer called H2D. On the top right we can see a bit of an AMS HT and with some temperature displayed. On top we can see a blurry module with pogo pins that looks like a Laser module.

Greg Saunier@gregsaunier· Jan 30

The SmartPrintCoreH7x is a new open source mainboard for 3D printing by Boltz R&D. - Support Klipper and Marlin - Robust components and connectors - 5+1 steppers (expandable) - Close loop capability - Loads of IO - 5V 10A for SBC - 5V + 12V 5A for fans ➡️ github.com/BoltzRnD/Sma... ➡️ boltzrnd.com

A view of the left with the quality and robust power connectors.

Greg Saunier@gregsaunier· Jan 21

The Jubilee is an open source 3D printer toolchanger that deserves to be better known. The extruder's locking system is on the frame to save weight. The design is well thought, it uses quality hardware and the doc is impressive. ➡️ www.jubilee3d.com/index.php ➡️ github.com/machineagenc...

CAD view of the frame, the motion and the side panels. The printed parts are in orange and the rest in gray.

Greg Saunier@gregsaunier· Nov 2

It's beautiful to see the @positron3d.com 3.2, an open source 3D printer, and LDO Motors, a company supporting many open source projects, being nominated. Congrats and good luck 💫🎉 ➡️ 3dprintingindustry.com/news/3d-prin...

LDO Motots nominated badge as "Company of the Year (Personal)"

Positron 3.2 nominated badge as "Desktop FFF 3D Printer of the Year"

Greg Saunier@gregsaunier· Oct 6

Seeing atoms with a 3D printed microscope! ➡️ www.youtube.com/watch?v=7N3O... Source: x.com/3Dable/statu... #3dprinting #microsope #atom

YouTube thumbnail with the title "3D Printed STM", in background the view of thousands of atoms in orange and on the right the microscope

Greg Saunier@gregsaunier· Oct 3

@adafruit.com has 786 certified projects! A nice proof that open source hardware is viable. I can't imagine how many projects, startups, companies or research have been accelerated thanks to these! I take my hat off to them 🙏 ➡️ certification.oshwa.org/list.html?q=... #OpenSource #oshwa #hardware