Causes And Treatment Methods Of Ball Screw Clearance (2)

In the previous article, we have talked about some of the causes of ball screw backlash and how to deal with it. Let's continue to introduce to you.

    5. The rigidity of the nut seat or bearing seat is insufficient.

    If the nut seat or bearing seat is not rigid enough, deviation will occur due to the weight of the element itself or the load pot of the machine. Using this method to test the stiffness of the nut seat, a similar test can be used to test the stiffness of the bearing seat.

    6. Improper assembly of the nut seat or bearing seat.

    (1) The parts are loose due to vibration or the lack of a fixed pin, and a solid pin is used instead of a spring pin to achieve the purpose of positioning.

    (2) Because the fixing screw is too long or the screw hole of the nut seat is too shallow, the fixing screw of the nut seat cannot be locked.

    (3) The nut set screw is loose due to vibration or lack of spring washer.

    7. The surface parallelism or flatness of the screw support seat is out of tolerance.

    Regardless of whether the surface of the composite element is ground or scratched, as long as its parallelism or flatness exceeds the tolerance range, the reproducibility of the position during table movement will be poor. Therefore, in a machine, shims are usually used for adjustment between the support base and the machine body.

    8. Improper combination of motor and roller screw.

    (1) The coupling is not firmly combined or the rigidity is not strong, which will cause the rotation difference between the screw and the motor.

    (2) If it is not suitable for gear drive or the drive structure is not a rigid body, slide.

    (3) Looseness of keys, or any improper matching between keys, keyways, and hubs, will cause gaps in these parts.

    The above is the cause and treatment method of the ball screw clearance. Find out the cause of the gap, and select the corresponding treatment method according to the cause, so as to better deal with the gap problem. If you don't do it right, you will only cause more damage to the ball screw. If you have any questions, please call Yongrun, and we have relevant technical personnel to answer your questions online.