1. The problem of screw processing
(1), the surface of the screw or nut bead groove is rough
(2), the ball, nut or the roundness of the nut is out of tolerance
(3), the lead error of the screw or nut or the diameter of the circle exceeds the tolerance range
(4) Improper assembly of the inverter
(5), the size or hardness of the steel ball is not uniform
2. Exceeding the itinerary
Excessive stroke will cause damage or depression, or even breakage of the return pipe, resulting in the inability of the steel ball to operate normally: under these harsh operating conditions, it may cause the surface of the screw or the ball groove of the nut to peel off. The cause of over-travel may occur in machine setting, limit switch failure or car crash. To prevent further damage to the ball screw, re-installation of the ball screw must be re-inspected by professional personnel.
3. The return pipe is damaged
The return pipe is severely impacted during installation, and the return pipe may cause dents and cause the same problems as described above. 4. Eccentric
If the nut seat and the nut seat are not concentric, radial load will be generated. If the eccentricity of the two is too large, the lead screw will be bent. Even if the eccentricity is not enough to cause obvious lead screw bending, abnormal wear will continue to occur and cause The accuracy of the lead screw decreases rapidly; and the higher the rated preload of the nut, the higher the requirements for eccentricity.
5. Improper combination of lead screw and nut seat
Inclination or eccentricity when the nut is installed will cause abnormal load, and voltage instability will occur when the motor is connected to rotate. 6. Damage to the ball screw during handling