title: A method of calculating motion error in a linear motion bearing stage.
abstract: We report a method of calculating the motion error of a linear motion bearing stage. The transfer function method, which exploits reaction forces of individual bearings, is effective for estimating motion errors; however, it requires the rail-form errors. This is not suitable for a linear motion bearing stage because obtaining the rail-form errors is not straightforward. In the method described here, we use the straightness errors of a bearing block to calculate the reaction forces on the bearing block. The reaction forces were compared with those of the transfer function method. Parallelism errors between two rails were considered, and the motion errors of the linear motion bearing stage were measured and compared with the results of the calculations, revealing good agreement.
authors.affiliation: Department of Ultra Precision Machines and Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Gyungho
authors.initials: G
authors.lastname: Khim
authors.affiliation: Department of Ultra Precision Machines and Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Chun Hong
authors.initials: CH
authors.lastname: Park
authors.affiliation: Department of Ultra Precision Machines and Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Jeong Seok
authors.initials: JS
authors.lastname: Oh