Copyright © 2006 Raven Engineering Inc ®

     All of our balancing machines come equipped with a drive unit and HBI-25 balance indication system.  The drive unit utilizes a hard-bearing suspension.  The rotation of the part around its geometric axis causes centrifugal forces on the bearing pedestals of the machine.  Piezo-electric measuring elements in the pedestals convert these forces into analogue alternating voltages.  These voltages are electronically amplified and sensed by the HBI-25 to indicate the weight and angular position of the unbalance in the part.

     The advantages of the hard bearing (stiff suspension) balancing machine is that it is very rugged, easy to operate, quick to set-up, and fully adjustable for a wide variety of parts. It also typically yields shorter cycle times than common soft suspension machines.  Since the stiff suspension virtually eliminates the part’s mass as a factor in the unbalance measurement, the machine does not necessarily require calibration at changeover.  Calibration, however, should still be performed periodically to ensure accuracy.

     The HBI-25 computerized balance indication system is a microprocessor-based device designed to indicate either 1-plane (static) or 2-plane (dynamic) unbalance.  This instrument contains a graphic touch display through which the operator can enter unbalance setup and system information, as well as the control programs necessary for calculating and displaying the angle of unbalance produced at both the right and left end of the part.  The amount and position of the unbalance in the part is separately determined during rotation of the left and right compensation planes.  Electronic compensation is used to ensure that the un-balance indication in the two planes do not influence each other.  Unbalance values can be displayed in grams, grams-centimeters, kilogram centimeters, kilograms, gram-millimeters, pounds, pound-inches, ounces, or ounce inches.  The angular information is displayed in degrees.