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After attaching weights of particular weight in particular positions perform a control
measurement. In theory, the indicator should now display two zeros meaning that the
remaining volume of imbalance does not exceed No 5 g, according to the set cut-off
threshold. In practice, it does not have to be this way. Why?
Firstly
— correction weights, regardless of their type, are produced with certain
acceptable deviation in weight.
Secondly
— the wheel balancer measures volume of imbalance with the accuracy up to
1 g, and the position of imbalance is defined by means of points with the accuracy up to 3
degrees of angular measure.
Thirdly
— a correction weight is not a point mass, but it has certain length — the greater
the mass, the greater the length
— therefore, while attaching the weight to the rim, it is
very easy to make an error of positioning (moving the weight against the topmost point of
the rim defined by the machine).
Thus, there may be a case when after a control measurement one gets a result of, for
example, 6 g for the inner plane and 7 g for the outer one. What to do next?
Case 1.
The indicator displays value 0.It signifies that the wheel has been balanced with the
accuracy up to 5 g, since such a cut-off threshold had been adopted. By pressing button
and setting the cut-off threshold to 2 g, it is possible to identify whether the wheel
has been balanced with the accuracy up to 2 g. Such a case occurs when both indicators
display value 0. If the indicator displays value 0 and, for example, value 4, it means that
the wheel has been balanced with the accuracy of up to 4 g. After pressing button
and resetting the cut-off threshold to 5 g, the indicator screen shall again display value 0.
Case 2.
The following results are obtained in the control
measurement: inner correction plane
— result 6,
outer correction plane
— result 7.
Then the wheel is placed according to the new position of imbalance (for each correction
plane).
