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c) calculated components d) the result of balancing ch. A e) the result of balancing ch. B
7.4.3
Grinding wheels balancing
Main menu
Measuring
Balancing
Grinding wheels
This option is used for dynamic balancing of two rotating wheels on short shafts of rotating
machines.
For correct function, the speed sensor must be connected. Further, it is
necessary to label the zero degree on the circular (angular) scale of the rotating wheel
with a reflective band. From this reference position (0°), the following runs are calculated.
After executing the process, screen with selection of previously saved machine coefficient
appears. You can choose the coefficients from database (balancing without the test run)
or do the measuring without choosing the coefficient from database (balancing with the
test run). After initiation the wizard is displayed, and asks to enter the machine rotation
direction and then to enter the position of the accelerometer towards the speed sensor.
The position is then noted in the balancing results.
3 weights of the same weight should be present on the grinding wheel, which are spaced apart
by 120 ° to position 0 °, 120 ° and 240 °, and therefore their influence on the balancing is
completely zeroed. Weights are placed permanently, and cannot be removed. All three weights
are used for the calculation.
First run:
Balancing grinding wheel operates only with one channel, which is set by
default to channel A. Click the forward arrow to start vibration analysis of rotating blade. To
support the analysis, the flywheel must spin at a steady state. Until this stage is reached, the
screen is greyed out and the arrow for proceeding is inactive. After the analysis, the vibration
velocity will be shown, see Figure 19a.
Vibration velocity value is relative to the maximal
amplitude of one dominant component in the spectrum – in this sense it is the revolution
frequency.
Test run:
for determining the place of displacement of various weights, a run must be
performed with weight shifted to a certain position, which together with the weight must be