The invention discloses a circular
grating encoder assembly inclination error optimization method and
system, and the method comprises the steps: building an
assembly model based on the geometric shape error of a bearing part of a circular
grating encoder, calculating the inclination deviation of
assembly, taking an initial assembly position as a reference, enabling a coded disc installation hub to rotate for a circle when the coded disc installation hub rotates for 30 degrees relative to a
central spindle, and enabling the coded disc installation hub to rotate for a circle; analyzing the assembly inclination deviation at each position, establishing an optimal assembly angle model, finding an optimal assembly angle, analyzing and modeling the assembly angle of the circular
grating encoder, and establishing an assembly model by sampling the shape error of the assembly surface, so that the measurement efficiency and the
measurement precision are improved; the installation of a circular grating bearing part is guided according to the model, so that the installation inclination deviation is reduced, the influence of the installation inclination deviation on the angle
measurement precision of the circular grating encoder is reduced, the angle
measurement precision is improved, and the method has a remarkable effect and important significance for a precise angle measurement
system of the circular grating encoder.