2026.10.06

Add an enhanced STEP file

Some users reported that the strength was insufficient, so we reinforced the top snap-fit and the bottom mounting post. However, after reinforcing the top, inserting and removing the tube requires a bit more effort。

增加加强版STEP文件

有人反馈强度不够，对顶部卡扣及底部螺柱做了加强，顶部加强后管子插拔时要对困难一点。

As the variety of nozzle sizes increases, the fact that the U1 hotend isn't quick-release has become a real pain point for the user experience.

That makes swapping the entire print head a much better alternative to replacing just the hotend. However, replacing the print head still requires unscrewing bolts, and there's always the risk of accidentally short-circuiting a capacitor. To solve this, I designed a self-locking top cover for the print head. It uses the insertion of the PTFE tube to lock the Type-C connector in place. Now, you only need to pull out the tube to swap the head!

⚠️ Note: Don't forget to recalibrate after replacing the print head.

随着打印喷嘴尺寸规格的增多，U1热端不能快拆的问题就影响体感了。

那么更换打印头相对更换热端来说，就是一个不错的选择。

但更换打印头还是要拧螺丝，还有不小心干爆电容的风险，所以我设计了这个自锁结构的打印头上盖，利用线管的插入来锁住typec接口。这样带换时只需要拔管就行了。

注意，更换打印头后要记得重新校准哦。

Known Issues

To achieve a locking function for the PTFE, the design would need to be significantly more complex. The current design is the result of a trade-off: we sacrificed the locking strength of the PTFE to ensure the USB locks securely. However, this leads to the two issues you mentioned. To lock the USB, the USB section has to be quite tight, which pushes the PTFE against the snap-fit mechanism. As a result, the PTFE loses its tension, and if it’s not installed precisely, it simply won't go in.

I'd say this is simply the structural limitation of this current version. The advantage is that it doesn't require any metal hardware, which makes things much simpler. The downside, as you pointed out, is those two issues. Fixing them would require a completely new structural design. I have considered it, but it would be overly complicated. If I have the time in the future, I might look into redesigning it.

如果要达到锁定PTFE的功能，那就要做到时候复杂的设计，现在这个设计就是经过取舍后，牺牲了PTFE的锁定强度来保证USB锁定，但同时你说的两个问题就会存在，为了锁定USB，USB部分变会卡的很紧，用PTFE来挤压卡扣，PTFE就不会再紧，要不急安装不进去了，只能说这一版本的结构限制就在这里了，好处是不需要五金件，省事，缺点就是你提到的两个问题，如果要解决这两个问题，就要重新设计一款结构。我有考虑过，但太复杂了，如果我有时间有话，可能会考虑再设计一下。