Laboratory Instruments

Everytime I use centrifuge in lab, when I start the centrifuge program it shakes and them settles down. Why?

2 Comments zu “Why Centrifuge Shakes First Few Seconds After Start Up?”

1. hillbill
   9-11-2009 @ 06:30

   I’m not a mechanic, but i’d say the bearings may be going bad in it. If it gets worse, a mechanic should check it out, don’t you think? Good luck.

   
   

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2. Denis S
   9-11-2009 @ 08:32

   All equipment has resonant frequencies that are dependent on the damping and mounting characteristics. Rotating equipment also has a source of driving frequency (the motor). As the motor starts, the rotational speed approaches and passes through the resonant frequencies causing noticeable movement (resonance) which is hopefully quickly damped out. Once it gets through those, the vibration tends to get rather small because of the ultra high speeds of the centrifuge. There’s no way around it. The best bet is to get through those speeds as quickly as possible before any damage is done.
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   For more information, look up resonant frequency, vibrational equipment design, etc.

   
   

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