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Recent content by skfboiler

  1. skfboiler

    Overhung Fan Field Balancing - Trial Weight

    After I get my reference run, I will get a coast down (Bode Plot)data when they shut the machine down for the trial. With the coast down I can determine if the machine is running above or below a critical speed. If the machine is running below critical, the high spot (the refernece phase...
  2. skfboiler

    Natural Frequencies on machines at rest vs. operating speed

    On a typical motor driven fan mounted on rolling element bearngs, does the natural frequency change when the machine reaches its operating speed?
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