The ball screw has the characteristics of high positioning accuracy, long service life, low pollution, high-speed forward and reverse transmission and transformation transmission. Because of the above characteristics, the ball screw has become one of the important components in the positioning and measuring system of precision science and technology industry and precision machinery industry recently. In the daily use of ball screw, we will encounter some problems more or less, especially the machine tool screw. So, what are the most common problems we encounter?
1. Overload problem
When the ball screw feed drive is in poor lubrication condition, the axial preload is too large, the screw is not parallel to the guide rail, the nut shaft is not parallel to the guide rail, and the screw is bent and deformed, which will cause an overload alarm. Usually, the alarm of servo motor overload, overheating or overcurrent will be displayed on CRT, or the indicator light or digital tube on the feed drive unit of electric cabinet will prompt the overload and overcurrent information of the drive unit.
2. Jumping problem
The jumping problem is that the lubrication state of the ball screw feed drive is poor, the gland pressure of the screw support bearing is not good, the ball screw is damaged, the screw support bearing may be broken, and the axial preload is too small, which makes the transmission gap of the feed drive chain too large and leads to the axial jump of the screw drive.
3. Crawling problem
Which usually occurs when the acceleration section is started or the low-speed feed is started, is mainly caused by poor lubrication of the feed transmission chain, excessive external load and other factors.
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