How To Reduce Ball Screw Whistling Harmonics

How To Reduce Ball Screw Whistling Harmonics

Diagnosing the noise released from a ball screw mechanism can send many engineers into a tailspin. Not only does this disrupt the production of the overall device, but it can delay future production and create additional mechanical problems. In this article, we’ll help you find potential sources for whistling harmonics in ball screw assemblies and assist you in maintaining production levels.

Identifying and Uncovering the Noise

Many engineers are noting that ball screw noise is inherent and relates to the mechanism itself and the drive function. But there is an increased demand for noise reduction efforts in an attempt to elevate the work environment and control noise pollution. With many focusing on reducing whistling harmonics, several findings about the noise have come to the surface.

The geometry of a ball screw naturally causes variable noise levels, so it’s about controlling the loudness and eliminating potential problems when the noise exceeds normal. Another key consideration is the rotational spin inside the mechanism and how smooth the screw’s surface is.

The Source of the Problematic Noise

Ball screw assemblies go back and forth between acceleration and deceleration, and this rhythm creates a harmonic whistling. When we dissect the assembly to find the root of the whistling, we find that the threading on the shaft plays the most significant role in the noise being released.

There is a vibratory element surrounding the grinding wheel in addition to when the ball bearings slip over these minor shaft nodules. The slipping causes distress and results in high levels of irritating noise.

Effective Noise Reduction Strategy

Now that we have an understanding of the sources of the noise, it’s easy to begin creating effective strategies to reduce or eliminate it. One potential solution is reducing the grinding speed, which may lead to other issues with the shaft and create a less economical assembly. This would be a viable solution where necessary or where economics is not a factor.

Another effective solution is adequately lubricating the shaft to create a smooth flow of motion within the drive. Lubrication is a reliable strategy, as long as the grinding wheel does not alter its temperature during machining.

Are you experiencing irritating noises and problems with your devices? Wedin International is a leading lead screw repair manufacturer equipped to help you reduce whistling and fine-tune your assemblies. Contact us today to learn more about harmonic whistling and noise reduction.