HEINS TURBOBALANCE MACHINE MODEL TC-2 W/ MANUALS & 20+ COMPRESSOR WHEEL MANDRELS

 is a balancing unit of the free suspension

or "soft bearing" type. The part to be balanced is suspended in

carriers free to move in the horizontal plane from the front to

the back of the machine. The supporting structure has a natural

frequency which is below the balancing speeds and therefore is

free to move in this plane when an imbalanced part is rotated in

the carriers. On each carrier is a vibration pickup of the acceler-

ometer type. As each carrier moves back and forth from the force

of the imbalance, the vibration pickups produce a small voltage

which is proportionate to the movement, which in turn is propor-

tionate to the imbalance in the workpiece.

The electronic amplifier and filter unit receives the imbalance

signals from each of the two pickups, filters out the unwanted

voltages of other frequencies and amplifies the wanted signals.

One section of the electronics utilizes the amplified signal to

give an indication of the amount of the imbalance. In conjunc-

tion with an electrical network system it can mix the two signals

to develop plane separation, the ability to determine the amount

of correction in each of two selected correction planes so that

a correction in one will not effect the indication in the other.

Another section of the electronics develops the signal further to

trigger the stroboscopic light. The strobe light is triggered

once each revolution of the workpiece. When this flash is

directed at the rotating body, it will appear to "freeze" the

workpiece in that position of the rotational cycle. As the

signal to trigger the strobe light is developed by the imbalance

signal, there is a definite relationship between the point on

the rotor that is visible and the location of the imbalance.

The designer of a product generally will provide a balancing

tolerance and determine two radial correction planes where

material can be added or removed to balance the mass around the

rotational axis. The balancer can be set up to determine the

amount of and location of the imbalance, so that the proper

corrections can be made.

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