Grégoire Saunier / is on Nostr

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.

GitHub: https://github.com/gregsaun
Patreon: https://www.patreon.com/gregsaun
Bear Upgrades Guides: https://guides.bear-lab.com

Last Notes

2024-06-21 04:01:46

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They designed an ambidextrous mouse, but omitted to add side buttons on both sides. However, they now add an AI button... 🤦

2024-06-12 00:30:58

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At least it was easy to pass the ears with his retractable function :D . Adorable!

2024-06-03 18:38:46

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oh nice finding, that's a new trick 🤦
Note that Sovol has only STEP and no native CAD, the source is missing once again.

2024-06-02 18:03:00

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Yeah raising up the 24V would be a good thing but not easy to find PSU for 48V and more. AC is an issue in DIY, several countries require a professional person to touch everything mains related. The problem is if you burn the garage with your 3D printer, your insurance might not reimburse you. Also stores selling those printers in EU could have issues as well as the manufacturers. So to me the Prusa approach is the best.

2024-06-02 17:04:56

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It is fast to heat a portion but for sure a bit slower to heat everything. So I think this is how they played with the marketing terms. Also heating a 6mm thick aluminum to core takes a bit of time while a PCB bed is quick. Obviously watts matters.

2024-06-02 16:57:52

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Yeah Prusa is one of the rare brands that tries to be legal and compliant and I am sure the AC beds were quickly out as they wanted to keep the kits, ease of repair ans wanted to be able to support efficiently their customers. AC beds means people would have to send back the full printers for a cable swap. BambuLab tried to avoid that and failed with the A1.
Yes I like the MCU idea for beds as well.

2024-06-02 16:50:25

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Absolutely!

2024-06-02 16:40:26

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It all depends on how it is designed. Cable chains are only better if they are done right and that is not something we see a lot in 3D printing. It is also more expensive. If you look at the latest UltiMaker they don't use cable chains while having a very high reliability level.

2024-06-02 16:36:05

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I like the XL bed, I think it is a good concept. Maybe a bit too much pads for this size but I also understand why. The concept is good for power consumption as you said and for safety. DIY AC beds are still illegal in several countries for example. Also the slower heating is not really a disadvantage if you look at reliability and quality as it will give a bit more time for the machine to heat up and stabilize (let the thermal expansion do its job).

2024-06-02 16:24:06

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I haven't looked at ruggedized cables but it is a bit more complex than a more solid cable. It needs to reach specs for cable chain (friction, radius, lifespan, etc). I am sure there are some made for that but the price would be very expensive as the cable is quite complex compared to CAN-FD.
Yes USB needs dedicated cables and connectors, I was more talking about the protocol than the cable in this case. It is easier and cheaper to make a dedicated USB cable I think.

2024-06-02 15:45:12

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You would have to use adapted cables and connectors. The standard cables are not made at all to vibrate in all directions for many hours. So knowing this, CAN-FD bus or USB-C is a better approach.