Repeated positioning accuracy of ball screw: position any 1 point (as the reference measuring point) in the same direction and measure the position.Make 7 measurements to the measuring point and get the maximum difference.The ± symbol is added before 1/2 of the obtained maximum value, and the value is taken as the repeated positioning accuracy.
Expressions such as C7 are JIS standard, the accuracy class is 7, and the stroke variation within any 300mm stroke is 0.050mm, that is, C7=0.050, C5=0.018.
P5 is a domestic standard, and the accuracy grade is level 5. The stroke variation in any 300mm stroke is 0.023mm, and the accuracy is generally expressed as P5=0.023.
Expressed in P can be divided into domestic level precision (P1, P2, P3, P4, P5, P7, P10 these seven grades, JIS grade precision in P can be divided into C0, C1, C3, C5, C7, C10 the 6 kinds of precision, but now Taiwan also appears the C2 and C6, both accuracy and precision of the P5 grade between C5 and C7, with the emergence of C6 = 0.025 basically equivalent.
Post time: Dec-16-2019