I’ve been busy building the mini kossel 3D printer on and off for about a year now. Unlike the Desi 3D printer that I’d build entirely from scratch， this time I decided to splurge on some decent off the shelf parts. I really like this printer design， its clean， simple， fast and economical.

I collected all the parts over the course of couple of months at the beginning of this year （2014）.It still looks a little messy. Need to find a better solution for those unruly wires.

The controller is a RAMPs board combined with an Arduino Mega. The extruder is an all-metal bowden that I bought while I was visiting Shenzhen， China.The hot-end is a MKV J-Head with 0.4mm nozzle.The dimensions of the first print are off by about 0.6mm and the first layer is a little too squished， but I’ll be able to get that down with some fine tuning.

One nice thing about this design is that it has an auto bed leveling mechanism which allows the printer to self calibrate before every new job. The original design uses an allen key connected to a limit switch to gently tap on different location on the print bed to self calibrate. I decided to try out a new design based on Johann’srecent experiments on using force sensor underneath the bed and using the hot-end itself to tap on the bed.

The FSR sensors are currently held in place by tape while a felt pad provides support for the above glass bed. I still need to find a more permanent solution to this.I’ll put up more detailed post on the build soon. In the meantime， calibrate， calibrate， calibrate.

自動翻譯僅供參考

迷你Kossel3D打印機

我一直忙于建設微型科塞爾3D打印機和關閉了大約一年了。不像德西3D打印機，我會完全從頭構建，這一次我決定揮霍一些體面的現成部件。我真的很喜歡這臺打印機的設計，它的清潔，簡單，快捷，經濟。

我收集了全國各地的數個月的過程中，部分在今年（2014年）的開始。它仍然顯得有些凌亂。需要找到那些不守規矩的導線更好的解決方案。控制器是一個坡道板結合一個Arduino兆。該擠出機是我買的，而我訪問深圳，中國的全金屬鋼纜。熱到底是MKV J-頭采用0.4mm噴嘴。第一次印刷的尺寸是關閉的0.6mm左右的第一層是有點過于壓扁，但我就可以拿到下來一些微調。

這個設計的一個好處是，它有一個自動床整平機制，使每一個新的作業之前打印機校準自我。最初的設計采用了六角扳手連接到限位開關輕輕敲擊在打印床上的自校準不同的位置。我決定嘗試基于Johann‘srecent實驗一個新的設計使用力傳感器的床底下，并用熱端本身挖掘在床上。

因此，FSR到位傳感器，目前持有的磁帶，而氈墊提供上述玻璃床的支持。我還需要找到一個更永久的解決這個。我會提出了更詳細的崗位上構建很快。在此期間，校準，校準，校準。