Greg Saunier
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gregsaunier.bsky.social
Greg Saunier
@gregsaunier.bsky.social
610 followers 310 following 550 posts
Bear Upgrades designer. I also share informative content on 3D printing and open source.
#3dprinting #opensource #engineering #mechanical

https://ekunn.com
https://github.com/gregsaun
https://patreon.com/gregsaun
https://fosstodon.org/@bear_lab
Posts Replies Media Videos
gregsaunier.bsky.social
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.
November 20, 2025 at 9:22 PM
gregsaunier.bsky.social
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."
November 17, 2025 at 6:40 PM
gregsaunier.bsky.social
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
Launch screen of the Orion UI with the Athena logo in the center with a dark background. Below the logo, we have the text "Powered by Open Resin Alliance" and the progress bar. 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". A screenshot of the Orion UI material profile. There 4 buttons on the screen, the two left one are for VAT and Chamber temperature, the top right is the target temperature adjustment and on the bottom right we have a "Mix and Preheat" button. In the very bottom we have 3 buttons: "Heaters" which is the selected one, then "Resins" and on the full right "Calibration". A photo of the Orion UI running on the Athena printer. There is a screen with a "Calibration Complete" message and an illuminated Athena logo below.
November 16, 2025 at 8:36 PM
gregsaunier.bsky.social
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.
November 7, 2025 at 4:35 PM
gregsaunier.bsky.social
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.
August 28, 2025 at 7:22 AM
gregsaunier.bsky.social
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
June 12, 2025 at 1:11 PM
gregsaunier.bsky.social
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
June 5, 2025 at 6:37 PM
gregsaunier.bsky.social
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.
May 30, 2025 at 8:46 AM
gregsaunier.bsky.social
The water level is rising by 90 cm per hour. :/
Aerial view of the Blatten village with the latest houses covered by water.
May 29, 2025 at 6:22 PM
gregsaunier.bsky.social
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
Klipper logo on white background
April 12, 2025 at 11:01 AM
gregsaunier.bsky.social
Don't try this
A jar of Ovaltine Crunchy Cream with a slice of bread spread.
April 7, 2025 at 1:33 PM
gregsaunier.bsky.social
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
March 20, 2025 at 10:12 PM
gregsaunier.bsky.social
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
March 18, 2025 at 3:41 PM
gregsaunier.bsky.social
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.
March 14, 2025 at 6:00 PM
gregsaunier.bsky.social
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
The mainboard on a white background with the title "Open Source 3D Printer Mainboard" on top. Bellow the mainboard, on the left, there is the "Bolt R&D" logo and on the right its name "SmartPrintCoreH7x". A view of the left with the quality and robust power connectors.
January 30, 2025 at 2:27 AM
gregsaunier.bsky.social
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.
January 21, 2025 at 5:20 AM
gregsaunier.bsky.social
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"
November 2, 2024 at 11:12 AM
gregsaunier.bsky.social
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
October 6, 2024 at 2:26 PM
gregsaunier.bsky.social
@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
A screenshot of the OSHWA certification page listing 786 projects from Adafruit.
October 3, 2024 at 7:22 AM