Balancing machine

The machine usually consists of two rigid pedestals, with suspension and bearings on top supporting a mounting platform.

Along with phase information, the machine can determine how much and where to add or remove weights to balance the part.

Thus use of dedicated fixture for each type of rotor may come at additional cost but offers the advantage of better balancing process accuracy and less dependent on the machine operator's skill level.

With the machine setup a little bit more tedious, it is generally more suitable for high-production volume and high-precision balancing tasks.

The latter being required when the rotor has a high service speed, or critical application (see ISO 201940 for recommended balancing tolerance.)

Both machine principles can be integrated into a production line and loaded by a robot arm or gantry, requiring very little human control.

This sensor works by moving a magnet in relation to a fixed coil that generates voltage proportional to the velocity of the vibration.

Once at rest, any movement by the part away from its geometric center is detected by two perpendicular sensors beneath the table and returned as unbalance.

Long blades that are also wide may require its axial moment to be measured to optimize hub stress distribution.

Portable balancers come with displacement sensors, such as accelerometers, and a photocell, which are then mounted to the pedestals or enclosure of the running part.