just wondered why the flange bearings are of type ZZ instead of 2RS.
As I know, one uses:
- open ones, if having high rpm but absolutely no dust
- 2RS, if low rpm (up to 3000) but dust
- ZZ somewhere in between
Currently, there is no problem with mine - all bearings work smoothly, but I think the ZZ type has potential to break. The steppers rpm are low, so why not use type 2RS?
Comments are appreciated.