A new method for characterizing axis of rotation radial error motion Part 1 Two-dimensional radial error motion theory

In the current standards of spindle metrology the fundamental component of radial probe measurement is considered radial throw (eccentricity) of the installed test artifact and the fundamental radial error motion is treated as non-existent The goals of this paper are (1) to make evident the fact that fundamental radial error motion can actually exist (2) to present new two-dimensional ('D) method to analyze spindle radial error motion measurement (3) to discuss the limitations of current pindle motion analysis methods In the 2D framework the radial error motion man application-independent geometric property and thus separate nom the consequence of radial error motion in spindle applications The 2D method can not only determine the axis of rotation radial error motion but also the consequence of error motion in all classes of spindle applications including a new class of spindle applications with two radial sensitive directions In comparison the radial error motion values specified in current standards give the consequence of radial error motion in two classes of spindle applications but do not represent radial error motion itself The new method is presented in two parts Part 1 focuses on the theory and illustration of the 2D method Part 2 presents the experimental results of a ball bearing,pindle and an aerostatic bearing spindle (C) 2010 Elsevier Inc All rights reserved