Patent ID: 6694634
Filing Date: 2004-02-24
Classification: B23Q,B25J,B82Y,G01B

Abstract:
A position error evaluating method of a moving device, comprising the steps of:in a moving device which moves a movable body in two axial directions or in three axial directions orthogonal to each other, obtaining by a sequential two-point method a straightness error curve indicating a state of change in a position error of said movable body along a uniaxial direction out of predetermined two axial directions among said biaxial or three axial directions, being repeated for the other urtiaxial direction out of said two axial directions, said position error being related to a direction orthogonal to said predetermined two axial directions; obtaining straightness error curves indicating a state of change in a position error of the movable body along said other uniaxial direction based on coordinate positions of both ends of a group of already obtained said straightness error curves, said position error being related to the direction orthogonal to said predetermined two axial directions, and setting the straightness error curves at the coordinate positions of the both ends as boundary straightness error curves; obtaining an error surface by correcting alignment of said group of straightness error curves based on said boundary straightness error curves; and evaluating a two-dimensional position error of said movable body on a planar surface including said predetermined two axes in accordance with said error surface, said two-dimensional position error being related to a direction orthogonal to the planar surface.