https://www.hyballscrew.com/product/linear-guide-rail/mgwc-standard-type-mgwh-extended-type-square-linear-guide.html When using a linear guide as a linear guide, since the friction method of the linear guide is rolling friction, not only the friction coefficient is reduced to 1/50 of the sliding guide, but also the gap between dynamic friction and static friction becomes very small. Therefore, when the platform is running, there will be no slippage, and the positioning accuracy of μm level can be achieved.