Hofmann geodyna 7400 Manual Del Operador página 70

Operation
5.11 Optimisation / Weight
Minimisation
5.11.1 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.
5.11.2 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 depress the menu
key F4 (Fig. 5-32).
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
5-32
case.
Compensation of unbalance of the clamping device is
cancelled by starting an optimisation or minimisation
run.
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