menu 9

Online Course for Practical Solutions Vibration

Seminar Schedule

Online Vibration Book

Request More Information

Practical Solutions to Machinery and Maintenance Vibration Problems

Chapter 7, Misalignment

Section 4, Machinery Soft Feet

Most craftspeople who align machinery already understand the phenomenon of what is usually called machinery "soft foot." As many vibration specialists have never actually aligned machinery, they may have heard of "soft feet" but may not always understand the result in vibration.

Update separates true machine soft foot from what is called "Foot-Related Resonance." Soft feet can cause increased vibration amplitudes, but not always. Although soft feet does not necessarily magnify machine vibration, it should be reduced for many reasons, including preventing vibration magnification. Understanding soft feet will also help the analyst when working with Foot-Related Resonance.

Although there are many combinations of conditions that produce a soft foot, most often it is the result of all the shimmed feet not being in the same plane. The following bottom views show some of the most common conditions for soft foot:

Textbook Index


This textbook contains only part of the information in our Practical Solutions seminar.

Link to Seminar Schedule. Order a print version of this entire textbook.

Home PageEmail Update