Vibration and noise levels are one of the most important quality characteristics of micro fans (coolers), which are widely used for cooling in modern electronic equipment (personal computers, medical devices, etc.).
We conducted a balancing of a batch of 100 coolers for one of the medical equipment manufacturers upon their request.

For this purpose, a special stand was made, which represented a lightweight platform suspended on rigid steel strings.
An epoxy quick-hardening composition was used as a correcting mass, which was applied to the blades of the micro fan to compensate for the imbalance. It should be noted that the masses of the correcting loads usually did not exceed a few hundredths of a gram.
As a result of balancing, the residual vibration of the coolers decreased on average more than 10 times and ranged from 0.01 to 0.05 mm/s for the entire batch of products.