Looks Nice, Your English (translated by Google) is much better than my Chinese, your Build looks good, I am interested in the bearings and wheels? can you tell us where you got them from?

你的英語（由谷歌翻譯）比我的中國好得多，構建看起來不錯，我很感興趣，軸承和輪子？你能告訴我們你來自哪裡得到了他們？

 

Ni hao - mini li.

I am sure that there will be many people interested in the rollers and rails you have selected for this build - they look like nice parts for this application. I also like your solution for the belt mount and drive. This is a great way to use a larger belt for added strength.

 

8mm光轴用啥型号的u型轴承？

 

Thanks for the tip for SG20 bearing.

It appears from the drawing that 8mm rods are (dw) for the SG20 to ride on. looking for economical 1500mm rods (or alternatives) at the moment. If your build is under 1000m this is not problem.

 

朋友，我在淘宝上找到了V型滑轮。
Hi,My friend.I find the V-Bearing on taobao.com

 

机器做得非常漂亮，羡慕中，大部分配件在淘宝上都能找到，我的也在设计中，打算用arduino做主控，请问你用哪款控制板？

 

Late to the party, but this SG20 bearing solution is still looking good to me. Definitely will give it a try.
两年后看到你的方案，我还是觉得很有启发。而且这个可能比直接用v-wheel更准更耐用，抽空会试一下。

 

Please take some photos of how the metal rods are attached to the v-slot extrusion.

Looks to be a great way to avoid plastic wheels using v-slot. Also one can avoid using the shaft clamp used in the rawcnc machines.