A balancing tool is simply anything that serves the analyst for the purpose of statically or dynamically balancing a rotating piece of machinery.

Static vs Dynamic Balance

Precision balancing should include:

  1. An instrument capable of reading data from different types of vibration sensors, including accelerometers, velocity sensors, and proximity probes among others.
  2. It should also be able to display the rotational speed of the machine and the phase angle of the unbalance. The instrument should have a tachometer or a stroboscope input to measure a target on the rotating component indicating the rotational speed in CPM/RPM/Hz.
  3. The analyst would also need to have a way of measuring the exact amount of weight that they may need to add or remove from the rotor for the purpose of balancing and a way of attaching those weights. These could include clamping with set screws or bolts, bolts and washers, welding of plate material, and here care must be taken to ensure the metallurgy of the machine is not compromised.
  4. The instrument the analyst is using should include a software program that the analyst is familiar with. The time to learn a balancing program is not in the field while trying to perform a balancing job. If the analyst does not have a program for balancing he or she should be able to graphically plot out the balance solution as necessary. This approach is usually slower and more error-prone.
  5. The cables that connect the sensors and the tachometer to the instrument should be of adequate length to be safely installed. There should also be thought about how to attach the sensors and tachometer to the equipment so they do not become detached during the balancing process.
  6. The analyst should also have a way to document the balancing process.

To help you implement balancing at your facility, download our 5-Step Balancing Procedure a simple and effective procedure for doing field balancing!

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, by Gary James CRL