@bear_lab@fosstodon.org
@bear_lab@fosstodon.org avatar

bear_lab

@bear_lab@fosstodon.org

Designer of the Bear Upgrades for Prusa 3D printers. I also share educational content on 3D printing technology as well as awesome projects from makers around the world.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

3dprinty, to random
@3dprinty@mastodon.social avatar

Have you caught Zack Freedman's video?

I didn't realize it was possible to feel nostalgic about something that happened less than a month ago!

https://youtu.be/GobDWJS7haw

bear_lab,
@bear_lab@fosstodon.org avatar

@3dprinty Congrats, I am glad he shared your work!

bear_lab,
@bear_lab@fosstodon.org avatar

@3dprinty Zack rocks!

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

High speed 3D printing aficionados, be careful when you increase the nozzle temperature for higher flow rates ⬇️

#3dptech #3dprinting #HighSpeed

vik, to random
@vik@mastodon.nzoss.nz avatar

It's bedtime, so I'm just gonna leave this here for now.
https://reprap.org/wiki/RepRapMicron

bear_lab,
@bear_lab@fosstodon.org avatar

@vik Wonderful work and very nice to see you working on this! Does the block stage also set the layer height? How do you control the extrusion flow?

bear_lab,
@bear_lab@fosstodon.org avatar

@vik Thank you for the explanation!

octoprint, to random
@octoprint@fosstodon.org avatar

New blog post: New release: 1.10.0 https://octoprint.org/blog/2024/04/24/new-release-1.10.0/

bear_lab,
@bear_lab@fosstodon.org avatar

@octoprint Wonderful release, can't wait to test this more responsive UI! Thank you 🙏

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

I wish we could find a better solution than grub screws for attaching pulleys to shafts in 3D printing. Small-scale requirements make it difficult to use other industrial systems.

Grub screws often loosen under the effect of vibration even with Loctite. They also introduce eccentricity. And the tip of the grub screws marks the shaft, making it difficult to remove the pulley.

Any idea how we could improve this?

@3dprinting

bear_lab,
@bear_lab@fosstodon.org avatar

@gooba42 it is an idea I haven't thought but I think it would be wobbling and making a non cylinder shaft is expensive and hard to find.

bear_lab,
@bear_lab@fosstodon.org avatar

@mcdanlj That is a good idea even if I am not we can rely purely on viscosity to center the pulley, might need some testing. Shaft tolerance used by motor manufacturers can vary I think. Now that would be permanent...

bear_lab,
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@gooba42 what is the tooling you are thinking about?

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

This is semi-solid aluminum 3D printing! Unfortunately, according to Ric Fulop (CEO and co-founder of DesktopMetal), it can't be commercialized because the temperature control is very difficult and, when it fails, is very problematic. Nevertheless, it's an impressive demonstration.

Source: https://twitter.com/ricfulop/status/1774497991857946689

Vidéo of 3d printing bridges with a semi-solid aluminum

peturdainn, to random
@peturdainn@mastodon.social avatar

youngest daughter wants to make a candle in a popular shape that resembles 9 balls stacked in a cube

could buy a silicone mold

could design a mold and 3D print it

I think I managed to design the mold, consisting of 5 parts

slicer told me the total printing time is 11 hours

can't back out of this, right?

bear_lab,
@bear_lab@fosstodon.org avatar

@peturdainn Very nice project. I have made a few candles as well, 3D printing works great for that. What filament did you use?

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

A clever way of hiding seams developed by MichaelJLew and pushed into OrcaSlicer. Teaching Tech explains it well in the video below.

📽️ https://www.youtube.com/watch?v=vl0FT339jfc

GitHub link: https://github.com/SoftFever/OrcaSlicer/pull/3839

#3dprinting #slicer #orcaslicer @3dprinting

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

Happy birthday RepRap, thank you for you stunning work and approach of the industrial world. RepRap is so much more than a bunch of machines, it is a different way to see how human kind could move forward better. 💚💚💚

https://reprap.org/wiki/Wealth_Without_Money

@3dprinting

octoprint, to random
@octoprint@fosstodon.org avatar

I wish all of you Happy Holidays, happy printing and that your nozzles may stay unclogged in 2024!

bear_lab,
@bear_lab@fosstodon.org avatar

@octoprint Happy Holiday and long life to the octopus!

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

If you don't know how genius the main rotor of a helicopter works then you should watch the latest Electronoobs video which explains it very well.

He is designing a 3D printed RC helicopter, not an easy challenge!

➡️ https://youtube.com/watch?v=S-yJUwbOvt0

@3dprinting

stargirl, to random
@stargirl@hachyderm.io avatar

Spent today desoldering, removing, and disassembling all the slide pots and jacks on the Arp 2600 I'm restoring. The next step is cleaning all of these. 💀

bear_lab,
@bear_lab@fosstodon.org avatar

@stargirl oh wow that should have taken quite some time :D

bear_lab, to 3DPrinting
@bear_lab@fosstodon.org avatar

1/3 Warning: using a non commercial license (e.g. CC BY-NC) for your 3D print design may not protect your work as you might think! A copyright based license can't be applied on purely functional physical object!

A great white paper from @mweinberg to read:
➡️ https://michaelweinberg.org/docs/3_Steps_for_Licensing_Your_3D_Printed_Stuff.pdf

@3dprinting

bear_lab,
@bear_lab@fosstodon.org avatar

@mweinberg @3dprinting
2/3 The only way to protect your functional physical object is to use patents.

If you are looking for an open source license for a physical object I recommend looking at CERN OHL V2. As this license is designed to be purely open source there is no way to restrict the sales with it.

bear_lab,
@bear_lab@fosstodon.org avatar

@mweinberg @3dprinting
3/3 If you want to use a license like CC BY-NC you may end up to have the worst of both world:

  • You have no protection against clone sales
  • You can't get all the advantages of open source (non commercial license are, by definition, non open source).
linux_mclinuxface, to 3DPrinting
@linux_mclinuxface@fosstodon.org avatar

This review on the tool changing Prusa XL is methodical and brutal.

I respect Micheal from Teaching Tech for making a probably unpopular video.

https://youtu.be/C1a2c-qeTQw?si=QBVeeCRC4a3wF5lH

bear_lab,
@bear_lab@fosstodon.org avatar

@linux_mclinuxface He is one of the most fair reviewers and he stays out of the bad noise. Unfortunately, it is getting difficult when you start saying negatives about Prusa (I know that too well). Btw, he forgot the point about missing sources while XL is sold as "all our parts are open source"

I am not that surprised by his results looking at how the machine is built. The last Prusa MMU3 blog post also shares issues with the nextruder, it is less reliable than MK3 extruder for this use case.

bear_lab,
@bear_lab@fosstodon.org avatar

@linux_mclinuxface We are still waiting for source files of the MK3, Prusa has promised to publish them 1.5 years ago! I don't understand why no YouTubers are talking about this. They don't hesitate to share negatives of other brands, but when it comes to Prusa...

Jo himself is pretty toxic too, he regularly bashes people/companies/projects online in social media and even in blog posts. Very open source oriented mindset.

bear_lab,
@bear_lab@fosstodon.org avatar

@MisterMaker @linux_mclinuxface Recently I have even seen copy-paste from another software without mentioning.

Open source is about 1:1 replication, so yes that means clones, you have to accept. Adafruit doesn't have a problem with this and Prusa is successful in business.

octoprint, to random
@octoprint@fosstodon.org avatar

New blog post: Funding update: You are amazing! https://octoprint.org/blog/2023/10/30/funding-update/

bear_lab,
@bear_lab@fosstodon.org avatar

@octoprint super good news 🤩

koz, to 3DPrinting
@koz@chaos.social avatar

I was looking at https://github.com/SnakeOilXY/SnakeOil-XY, and I saw it has two motion system options:

  • CoreXY
  • Hybrid CoreXY

I looked up what hybrid CoreXY was, and I'm not sure what its merits and drawbacks are relative regular CoreXY. Could someone fill me in?

@3dprinting

bear_lab,
@bear_lab@fosstodon.org avatar

@Stark9837 @fleaz @koz @3dprinting On CoreXY, the belt needs to be quite long which sometimes could add some flex. It also requires more moving parts like pulleys and bearings, this increases the risk of failures or extra maintenance. Some belt paths need to be more careful with the tension of both belts. A Z moving bed design doesn't necessarily require a CoreXY motion, it can be made simpler and more reliable.

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