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CORE One L Kit interest  

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mnentwig
(@mnentwig)
Honorable Member
RE: CORE One L Kit interest

edit window expired - strike out that part

 If the PSU doesn't reliably shut down on overcurrent.

to make more sense 🙂

We'll just put some bleachers out in the sun-And have it on Highway 61
Posted : 21/04/2026 7:14 am
hyiger
(@hyiger)
Famed Member
RE: CORE One L Kit interest

A lot of speculation but at the end-of-the-day, Prusa are still on record that they will not provide kits for the Core One L in the foreseeable future. I'm sure the Core One and it's future iterations will still be in kit form for now if you want to build something. My personal feeling is Prusa is evolving away from kits based on (speculation) that they probably were overwhelmed by support for the Core One.

My build was pretty uneventful but this was by far not my first complicated kit so I'm usually good at following instructions precisely. Would be interesting to know how many kits were partially built and returned versus the MK4. 

Posted : 21/04/2026 2:51 pm
Cédric
(@cedric)
Estimable Member
RE: CORE One L Kit interest

 

Posted by: @hyiger

A lot of speculation but at the end-of-the-day, Prusa are still on record that they will not provide kits for the Core One L in the foreseeable future. I'm sure the Core One and it's future iterations will still be in kit form for now if you want to build something. My personal feeling is Prusa is evolving away from kits based on (speculation) that they probably were overwhelmed by support for the Core One.

My build was pretty uneventful but this was by far not my first complicated kit so I'm usually good at following instructions precisely. Would be interesting to know how many kits were partially built and returned versus the MK4. 

It was also my conclusion after the C1 kit, that I dont think prusa will do this anymore. Just to much work, very complex costly packaging, extra detailed instructions, probably more support due to clumsy people and they sell it for quite a bit less money. I loved building my C1, If the kit and complete printer were the same price I would still chose the kit, its both fun , i know exactly how its built, and I can take my time to do everything perfect. 

Posted : 21/04/2026 3:08 pm
hyiger
(@hyiger)
Famed Member
RE: CORE One L Kit interest

 

Posted by: @cedric

Just to much work, very complex costly packaging, extra detailed instructions, probably more support due to clumsy people and they sell it for quite a bit less money.

Just kind of eyeballing the support requests on this forum, I would guess the majority of issues were around belt routing: installing the motor pulley incorrectly, the gantry brackets in the wrong location etc. Or in one case, the user assuming the "belt was too short" and ordered a longer one to "fix" it causing even more problems. I might get Claude to chomp through the forum (when it's early morning in Europe) and summarize all of the support issues reported here. Would be a fun exercise. 

Posted : 21/04/2026 3:27 pm
1 people liked
hyiger
(@hyiger)
Famed Member
RE: CORE One L Kit interest

Just to confirm again. Prusa is on record during a live stream as stating (I'm paraphrasing): due to regulatory certification issues (the AC bed), there will be no Core One L kits. 

Posted : 04/05/2026 6:28 pm
Robin_13
(@robin_13)
Honorable Member
RE: CORE One L Kit interest

Which again, raises the question about repairs?  If you cannot build the printer, does that mean you cannot repair the printer, and Prusa won't be selling spare parts?  A deal killer for me.  Does that mean all those people that want the INDX heads, need to have Prusa make the mod since they may have to work with the bed?

Posted : 05/05/2026 2:48 am
hyiger
(@hyiger)
Famed Member
RE: CORE One L Kit interest

 

Posted by: @robin_13

Which again, raises the question about repairs?  If you cannot build the printer, does that mean you cannot repair the printer, and Prusa won't be selling spare parts?  A deal killer for me.  Does that mean all those people that want the INDX heads, need to have Prusa make the mod since they may have to work with the bed?

You can buy a replacement bed since it plugs into the power-supply. However you will not be able to buy the L as a kit. Also, the Core One will not have an AC bed upgrade for similar reasons as stated above. 

Posted : 05/05/2026 6:05 am
cwbullet
(@cwbullet)
Member
RE: CORE One L Kit interest

I am arguing, but I do not understand the regulatory issues.  It must be European.  

Posted by: @hyiger

 

Posted by: @robin_13

Which again, raises the question about repairs?  If you cannot build the printer, does that mean you cannot repair the printer, and Prusa won't be selling spare parts?  A deal killer for me.  Does that mean all those people that want the INDX heads, need to have Prusa make the mod since they may have to work with the bed?

You can buy a replacement bed since it plugs into the power-supply. However you will not be able to buy the L as a kit. Also, the Core One will not have an AC bed upgrade for similar reasons as stated above. 

 

--------------------
Chuck H
3D Printer Review Blog

Posted : 05/05/2026 10:46 am
Jürgen
(@jurgen-7)
Famed Member
RE: CORE One L Kit interest
Posted by: @cwbullet

I am arguing, but I do not understand the regulatory issues.  It must be European.  

What would be examples of mains-powered Class 1 devices that are currently sold as a kit in the US?

Posted : 05/05/2026 10:51 am
cwbullet
(@cwbullet)
Member
RE: CORE One L Kit interest

 

Posted by: @jurgen-7
Posted by: @cwbullet

I am arguing, but I do not understand the regulatory issues.  It must be European.  

What would be examples of mains-powered Class 1 devices that are currently sold as a kit in the US?

I am not an expert in that area. But there are no laws preventing me from working on my circuit breaker.  I just have to do it within the code.  

Is it a smart choice?  That is debatable.  I would say no.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 05/05/2026 10:55 am
hyiger
(@hyiger)
Famed Member
RE:

 

Posted by: @cwbullet

I am not an expert in that area. But there are no laws preventing me from working on my circuit breaker.  I just have to do it within the code.  

Is it a smart choice?  That is debatable.  I would say no.  

It's probably not an issue in the US but Tommy mentioned that Prusa didn't want to deal with getting certification in each jurisdiction: US, CA, UK, EU, JP etc etc etc so they simply decided: "No Core L kits" Maybe in the future PrintedSolid could (in theory) introduce a kit for the US market only. Who knows?

Posted : 05/05/2026 3:44 pm
cwbullet
(@cwbullet)
Member
RE: CORE One L Kit interest

Fair enough.  I doubt it will be available in US if it is not  available elsewhere.  

Posted by: @hyiger

 

Posted by: @cwbullet

I am not an expert in that area. But there are no laws preventing me from working on my circuit breaker.  I just have to do it within the code.  

Is it a smart choice?  That is debatable.  I would say no.  

It's probably not an issue in the US but Tommy mentioned that Prusa didn't want to deal with getting certification in each jurisdiction: US, CA, UK, EU, JP etc etc etc so they simply decided: "No Core L kits" Maybe in the future PrintedSolid could (in theory) introduce a kit for the US market only. Who knows?

 

--------------------
Chuck H
3D Printer Review Blog

Posted : 05/05/2026 7:31 pm
alphasigma
(@alphasigma)
Trusted Member
RE: CORE One L Kit interest

 

Posted by: @cwbullet

I am arguing, but I do not understand the regulatory issues.  It must be European.  

 

The regulation is not only an "issue" of EU. Try to answer following question:

What is the difference between

  • a printer bought from Prusa or any other manufacturer (it doesn't matter if buying directly or via a dealer/reseller) and
  • a PC (computer) you assemble yourself with parts you bought yourself (it doesn't matter if you buy all parts from one source/shop/dealer or from different sources because of different prices)?

I bring up the example with a PC, because people are sometime referring to a PC - "I can build a PC with a power supply...why not building a printer with a a/c bed...?"

 

Core One L

Posted : 06/05/2026 8:39 am
Cédric
(@cedric)
Estimable Member
RE: CORE One L Kit interest

 

Posted by: @hyiger

 

Posted by: @cwbullet

I am not an expert in that area. But there are no laws preventing me from working on my circuit breaker.  I just have to do it within the code.  

Is it a smart choice?  That is debatable.  I would say no.  

It's probably not an issue in the US but Tommy mentioned that Prusa didn't want to deal with getting certification in each jurisdiction: US, CA, UK, EU, JP etc etc etc so they simply decided: "No Core L kits" Maybe in the future PrintedSolid could (in theory) introduce a kit for the US market only. Who knows?

Electrical safety rules on what you can do as a private person are not aligned within EU countries either, quite a complicated subject. Its probably alot easier with CE etc on a complete machine, since those rules are more aligned. 

Posted : 06/05/2026 8:50 am
cwbullet
(@cwbullet)
Member
RE:

I am not saying regulations are only a European issue.  I am saying this AC issue for the bed might be elsewhere because I do not think it is in the US.  

Posted by: @alphasigma

 

Posted by: @cwbullet

I am arguing, but I do not understand the regulatory issues.  It must be European.  

 

The regulation is not only an "issue" of EU. Try to answer following question:

What is the difference between

  • a printer bought from Prusa or any other manufacturer (it doesn't matter if buying directly or via a dealer/reseller) and
  • a PC (computer) you assemble yourself with parts you bought yourself (it doesn't matter if you buy all parts from one source/shop/dealer or from different sources because of different prices)?

I bring up the example with a PC, because people are sometime referring to a PC - "I can build a PC with a power supply...why not building a printer with a a/c bed...?"

 

 

This post was modified 3 days ago by cwbullet

--------------------
Chuck H
3D Printer Review Blog

Posted : 06/05/2026 10:52 am
UjinDesign
(@ujindesign)
Reputable Member
RE: CORE One L Kit interest

 

Posted by: @hyiger

 

Posted by: @robin_13

Which again, raises the question about repairs?  If you cannot build the printer, does that mean you cannot repair the printer, and Prusa won't be selling spare parts?  A deal killer for me.  Does that mean all those people that want the INDX heads, need to have Prusa make the mod since they may have to work with the bed?

You can buy a replacement bed since it plugs into the power-supply. However you will not be able to buy the L as a kit. Also, the Core One will not have an AC bed upgrade for similar reasons as stated above. 

Turns out you can't...? https://www.prusa3d.com/category/heatbed-2/ They don't seem to be selling replacement beds. I don't think the bed is something that has a high likelihood of breaking but still, it would in essence brick the entire machine if the heatbed broke since it wouldn't be cost-efficient to ship the entire printer to Czech Republic for a replacement if the heatbed broke outside of warranty. 

Posted : 06/05/2026 2:12 pm
hyiger
(@hyiger)
Famed Member
RE: CORE One L Kit interest

 

Posted by: @ujindesign
Turns out you can't...? https://www.prusa3d.com/category/heatbed-2/ They don't seem to be selling replacement beds. I don't think the bed is something that has a high likelihood of breaking but still, it would in essence brick the entire machine if the heatbed broke since it wouldn't be cost-efficient to ship the entire printer to Czech Republic for a replacement if the heatbed broke outside of warranty. 

Tommy said in a recent Prusa stream that replacement beds will be available as a spare part. Maybe it's not in the store yet. 

Posted : 06/05/2026 2:34 pm
1 people liked
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