Through analyzing several common errors that have impact on the kinematic accuracy of globoidal cam mechanism,finally a mathematical model of globoidal cam impinged with error was established.By using the differential method,the motion accuracy influence coefficients of the globoid cam mechanism were obtained.The change rule of kinematic accuracy influence coefficient with the change of globoidal cam rotation angle was analysed with practical cases.The analysis result shows:different error factors lead to different influence coefficient; Radius error of the index disc roll has the greatest impact on motion precision,while shaft angle error almost has no influence on the movement precision; The meshing position of the globoidal cam mechanism affects the kinematic accuracy volatile; Moreover,each motion accuracy influence coefficient has a certain relationship with the structure factors of globoidal cam.
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