The Snapmaker Wiki lists materials for printing these parts:
Preferred: ABS, ASA, ASA CF, or PETG for better heat resistance and long-term use.
Alternative: PLA can also be used, but may deform more easily over time.
The page linked to the Wiki does not exist.
Hi, thanks for the feedback 
.We performed a site migration for the Wiki yesterday, which broke the original links. The links have now been updated.
Added the latest link to the wiki in your post because the old one was broken.
It’s pretty obvious they used thicker foam than originally planned, probably with the thought that it will compress over time. Not really a faulty design or the end of the world.
What’s the point of a 3D printer if you can’t design and print things to fix or improve something? Do that many people only use them as a toy factory?
I’m pretty picky about things but some of this is taking anal retentive to a new level…
I completely agree with **flamtnbkr! Snapmaker created a marvel with the U1. It may have a few flaws, like all 3D printers, but nothing serious. I highly recommend this machine!
Thats cope my dude, we pay for it we should expect nothing but the final product, nobody should be happy paying to be a beta tester. Support assured me this was a "low‑probability, isolated issue".
You can bet ill be returning it if its defective, i dont care about half fixes, for half solution i would buy the ikea thing, i did wait long enough for the top cover to leave beta so i could order the final product, i accept nothing less.
You have some brown PLA on your nose…
Seriously man… The printer itself is fine, the top cover is nice, but you are taking this shill thing to a whole other level.
Come on play nice please - I understand both sides of the coin, but lets not get personal or nasty about it? Just agree to disagree…
I aggree with @ColdCoffee , please keep the discussion factual and get not personal.
The fact that most of you backed a Kickstarter project should not be surprised about the one or another design flaw on this machine or it’s additions. It’s hard to design items to its very end and from what I see, snapmaker is steadily improving their workflow and skills to do better in the future.
In the past they even upgraded the dual extruder toolhead of the 2.0 and Artisan for free to fix continued problems.
This is no excuse, sure you should get a working product but, does it work with the thicker foam and the printable workaround? Is it fact you pre-ordered a product you never knew how it will look in the end?
I would suggest to keep calm and see if snapmaker will fix it somehow (if it’s possible. Sorry no U1 user here..).
Regarding the staying in place issue… The only true fix is thinner foam, I could see them sending everyone new thinner foam as a replacement, which seems easy. The other option is simply using the 3d printed part and going about your day.
Some people are having over-heating issues, which could be the bigger issue to address…
Regardless… Constantly singing the praises of the company doesn’t land well when problems are trying to be addressed honestly. I will say being overly-negative and dismissive does nothing to help either.
Hi @Rocklou and all,
Thank you all very much for sharing your different views on this issue 
. We are sincerely grateful to our forum users who are willing to speak up for us and help maintain a positive community atmosphere.
I want to clarify the silicone mount issue mentioned here:
the mounting posts underneath the Top Cover may not remain fully seated in the silicone pads after installation. This is within the normal range of assembly tolerances and does not affect the installation, sealing performance, or normal use of the Top Cover.
This is mainly due to the design of the mounting posts and the thickness of the seal foam. The Top Cover is primarily supported by its outer shell and seal foam, while the thicker foam helps ensure proper sealing and accommodate variations in the printer’s top surface. Its spring-back force may cause the mounting posts to lift slightly after installation.
But we agree that a cover that feels loose isn’t a great user experience. Even if it works. That’s not the standard we want to deliver. In the meantime, please don’t hesitate to reach out to our technical support if you have any other concerns or requests. They will assess your specific situation and offer corresponding solutions.
Updated(2026.10.8):
Please check post #181 for the latest information.
I’ll also keep updating progress and next steps for this matter in the following topic.
U1 Top Cover Seating: Update and Improvement Plan
Best regards,
Thanks to Snapmaker for the reminder! And I want to clarify that the problem is resolved by changing the support parts, especially for ColdCoffee who didn’t understand my comment!
Hi Zoe,
So, one side says its “low probability, isolated issue” and the other says “The poor-fitting issue of the top cover stems from structural adaptation imperfections on our end”.
So, “Isolated issue” and "structural adaptation imperfections" one side is trying to gaslight me, the other is direct and real.
Just stop please, this isn’t useful or helpful to the conversation and can be seen as deliberate act of trying to cause mischief
Today I received my top cover. I put the extensions on, put the cover on the printer, performed the initializations and started printing. Case closed…
Received my Top Cover today (2026-09-23). Same issue as the owners above: the posts rest on top of the silicone mounts and the 5mm foam lifts the cover back out.
I have filed a support ticket asking for a dated fix or a refund, since Zoe_M describes the wiki extender as “a temporary workaround” and “not an official formal fix”.
@Zoe_M , one question: when you wrote “replacement parts” on Sep 18, does that include a revised cover from the new mold for owners of the original design, or only the extended silicone plugs? Thank you.
Hi, Regarding “replacement parts,” this generally refers to replacing the existing accessory and sending out a new one.
Specifically for the top cover issue: the replacement top cover would still be from the current design batch. Due to manufacturing tolerances, not all top covers currently have the “not closing tightly” issue, but there is still some risk. Therefore, we generally don’t recommend choosing a replacement as the preferred option at this time.
As for the final resolution, it may be best for you and our technical support team to coordinate and agree before deciding on the most suitable option.
Updated(2026.10.8):
Please check post #181 for the latest information.
I’ll also keep updating progress and next steps for this matter in the following topic.
U1 Top Cover Seating: Update and Improvement Plan
Best regards,
@Zoe_M thank you for the answer. Support replied to my ticket today (2026-09-24). It says the posts not seating is “within the normal range of assembly tolerances” and “does not affect the installation, sealing performance, or normal use of the Top Cover”. It offers the printable extender plus a $20 Snapmaker gift card, or a return. It does not mention the mold revision or give a date.
Your posts say something different. #116: “structural adaptation imperfections on our end”, “full responsibility”, the extender is “not an official formal fix”, and Snapmaker will “implement a formal rectification plan”. #73: the 5mm foam is the cause and “we have opened a project to revise the top-cover mold”. #38: “a high-priority item on our roadmap”.
Two questions:
- Which position applies to owners of the original-design cover: normal tolerance, or a defect that the mold revision will fix?
- Once the revised mold is in production, will these owners get a revised cover at no cost, and can support note that on the ticket?
There does seem to be a break down in communications between said support and what is being posted on the forums?
I would be /very/ surprised if a free lid was offered - My advise (not legally binding!) if you are unhappy/unsure at ALL is to return the lid for a refund and either sit on your hands until the the revision unit is released, or choose to go one of the numerous other options available either on the market or DIY printable