Microscopic Behavior of Preloaded Ball Screw for Ultraprecise Positioning with Nanometric Resolution

摘要

Non-linear elastic behavior of preloaded ball screws is discussed experimentally. Some experiments are performed on two kinds of ball screws that are preloaded by differing methods. Experimental results with newly developed apparatus show both microscopic and macroscopic behavior in positioning. It is proved that the final settling of positioning is ruled by the non-linear elastic property.