CEMB USA N500 - Manual (Page 53)

Balancer mode 7 - 11
4 – indication of the correction weight, in value and position on every plane.
N.B.
The module is indicated in general units U, corresponding to those used in setting
the test weight. As the program makes use of correction through addition of
material, the position indicated is the one where to add the correction weight.
When it is required to proceed by removal of material, act in a position
diametrically opposite (add 180° to the displayed phase)
5 – average speed of rotation and filter accuracy with which the unbalance has been
measured
Caution:
The average speed value is important because it allows checking whether the
measurement has been made at a speed not too different from that used in the
calibration spins (differences less than 5%). Owing to small amounts of non
linearity always preset in actual practice, it is not advisable to proceed to calculate
the correction at a speed too widely different from the calibration speed. Checking
of this condition is up to the operator.
6 – value and phase of the vibration synchronous with the rotation (1xRPM) and total
value(Overall) vibration measured via the sensors
N.B.
This information is considerably important as indicator of the reliability of the
balancing: what concerns us in actual practice is to reduce the vibration to under a
certain value considered as tolerable (see Appendix B). However reduction of the
unbalance only has effect on the 1xRPM component. A low value of this
component, accompanied by a high Overall indicates problems differing from those
of unbalance, which, therefore, cannot be corrected by balancing.
7 – instructions for unbalance measurement and calculation of the correction
8 – functions available
: calibration procedure
N.B.
If the calibration procedure has not been completed, this button starts flashing, to
warn the operator to return to the calibration procedure before being able to make
unbalance measurements. If not, indication is already given of the correction
weights and positions where to act, deduced from the calibration spins.