Implementation of jack bolts with built-in preload sensors for level condition monitoring of machine tool

Abstract

Precision machine tools are usually installed on foundations via supporting elements. In this configuration, errors because of inappropriate support lengths (level error) have to be adjusted during the installation to align the level of the machine tool. Consequently, a quantitative indication of level errors is a necessity for levelling works. Therefore, a model-based approach for level condition monitoring, which can identify level errors, is proposed. In the model, machine supports are modeled as linear springs. The relationship between the level error and preload distribution is modeled in matrix form. This report verifies the fundamentals of the proposed approach through experiments performed on a machining center.