John Bean VPI System IV, Руководство по эксплуатации

Страница: 40 / 67

73
5.4.2.3-1
5.4.4-1
5.4.3-1
5.4.4-2
entered using the function keys and rotating the wheel:
•
Fit adhesive weights in the given positions according
to the balancing mode. Make sure to observe the
given positioning dimensions (Fig. 5.4.2.3-1).
Dimensional tolerances result in slight deviations of the
measured values so that the weight may need to be
repositioned after the check run. In this case an OK
indication is not displayed after the check run.
5.4.3 Check run
•
When the balance weights are fitted, start a check
run either by pressing the START key or by closing
the wheel guard, depending on which mode is
preset.
After the check run both readings will be “0” if the wheel
is perfectly
balanced, and the OK pictograph comes up (Fig. 5.4.3-
1).
Note
If there is no OK reading, dynamic unbalances below
the tolerance limit (suppression preset to 3.5 g) add to
a static unbalance above the tolerance limit. These
residual unbalances are read out upon operation of
the menu key F2 and should then be balanced.
5.4.4 Static unbalance
In general the wheels should be balanced dynamically,
i.e. in two correction planes.
If the wheels to be balanced are rather small (e. g.
motorcycle wheels), only static unbalance should be
measured and corrected.
•
To display static unbalance press menu key F3 (Fig.
5.4.3-1) at the bottom.
A screen as in Fig. 5.4.4-1 comes up.
For correction diameter and possibilities of correction
of static unbalance see Fig. 5.4.4-2.
Recommendations for fitting balance weights for
static unbalance correction
The correction diameter of static unbalance is usually
the same as the one of dynamic unbalance. With
various balancing modes where the weights are not
fitted on identical correction diameters (Alu 2, Alu 3,
Alu 4 and Alu 5), the correction diameter for static
unbalance is programmed in the machine.
As it is not always possible to correct static unbalance
in the ideal rim position, the following recommendations
for correction (Fig. 5.4.4-2) should be observed.