The accuracy of the Ball Screw in the lead angle is controlled in accordance with the JIS standards. rolled ball
Accuracy grades C0 to C5 are defi ned in the linearity and the directional property, and C7 to C10 in the travel distance error in relation to 300 mm
Effective thread length Nominal travel distance Reference travel distance Actual travel distance Representative travel distance Representative travel distance error Travel distance error Target.
Generally, it is the same as nominal travel distance, but can be an intentionally corrected value of the nominal travel distance according to the intended use.
Representative Travel Distance :-It is a straight line representing the tendency in the actual travel distance, and obtained with the least squares method from the curve that indicates the actual travel distance.
Fluctuation :-The maximum width of the actual travel distance between two straight lines drawn in parallel with the representative travel distance.
The measurement data are expressed in a graph. The positioning error (A-B) is indicated as the actual travel distance while the straight line representing the tendency of the (A-B) graph refers to the representative travel distance.
The difference between the reference travel distance and the representative travel distance appears as the representative travel distance error..
