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本帖最后由 funnynypd 于 2019-12-25 01:43 编辑
>Wow! Almost 8 times price.
Yes. Plus, the USD400 doesn't include stepper motor and driving circuits. A full system cost at least USD600. This is why there are some needs for the machines (fully assembled) shipped from HK or TW on ebay.
However, there are some minor changes on the detail, in particular, more bearings are used on the USA version.
On the USA Z-toolworks version, there are two bearing on each axle, on the taobao one, there is only one bearing on the open end, the other end, it counts on the stepper motor (functioned as the 2nd bearing). I don't like this cost reduction idea. It may work, but not a good design. I have never find one with two bearings on the axles from taobao.
This is the major improvement on the USA version (I own two of them from Z-Toolworks, one is the 7*7, which is well balanced, it fulfill the needs just fine. another one is 12*7 in size, which is not so rigid, I don't like it).
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