When the temperature of the ball screw increases, the effect of thermal stress will make the screw elongate, making the length of the screw unstable. The elongation can be calculated by the M40 formula, and the elongation can be compensated by pre-tensioning; and the target value of pre-tensioning compensation is the negative T value indicated on the drawing.
Excessive pretension will burn the support bearing, so it is recommended to use a pretension value of less than 5℃, but if the diameter of the screw exceeds 50mm, it is not suitable for pretension; a large diameter of the screw requires a large pretension, which leads to The support bearing is overheated and burned out. It is recommended to use a temperature rise of about 3°C as the reference for the compensation value T.
