180
7
7-19
Operation
7.1 Optimisation / Weight
Minimisation
7.1.1 General
Optimisation is a fi ner form of matching.
During the opto–ride procedures the rim and tyre are
adjusted relative to each other on the basis of different
unbalance measurements. This generally means that,
where present, lateral and radial run–out and radial
and lateral force variations are reduced and thus
wheel running conditions optimised. In addition, the
mass (balance weight) necessary for balancing can
be reduced.
If optimisation is not desired, it is possible to achieve
weight minimisation (so–called matching).
This is e. g. possible if the rim does not exhibit geometric
deformations, in other words when unsmooth wheel
running conditions are a result of a non–uniform tyre.
In this case the unbalance of the rim can be readjusted
relative to the unbalance of the tyre such that the
unbalances compensate each other and the smallest
possible weight for unbalance correction is determined.
7.1.2 Instructions for the optimisation /
weight minimisation programs
During tyre changing operations, as required for
optimisation/minimisation, the wheel balancer
can be used as a conventional wheel balancer by
another operator.
For this purpose, interrupt the optimisation/
minimisation program by pressing the ESC key or
STOP key. The electronic unit will then store the
4, 6, 10 program step, the rim dimensions and all
data so far measured.
If another optimisation/minimisation run is to be
started after an interruption, it is suffi cient to press
the key 7 (Fig. 7-19).
During optimisation/minimisation a measuring
run always has to be started with the START key.
“Starting by closing of the wheel guard” is not
operative in this case.
Compensation of unbalance of the clamping device is
cancelled by starting an optimisation or minimisation
run.
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