Fig. 5
System with two virtual measuring planes outside of the physical range
When the measuring planes are located in optimum positions, the virtual left-hand measuring
plane is just inside the wheel disc when the wheel is as close as possible to the housing of the
wheel balancer (see
Fig. 5).
In this extreme case the left-hand correction plane is slightly
displaced left of the left-hand measuring plane. Analogously the right-hand virtual measuring
plane is slightly displaced left of the right-hand correction plane in the case where the wheel
is in the remotest location relative to the housing of the wheel balancer. Apart from these
extreme cases the two correction planes are mostly located between the two virtual measuring
planes. Locations of the two measuring planes can be calculated such that the effects of force
relations are minimum over the entire range where correction planes can be located.
Virtual displacement is based on a vibratory system where the support levers are not located
in parallel, but in an angle relative to the measuring shaft as illustrated in
Fig. 6.
Fig. 6
Vibratory system with virtual node of vibration
In this arrangement a node of vibration forms approximately in the point of intersection of
extended support levers. When forces act on the measuring shaft, e g centrifugal forces caused
by rotating unbalance, it comes to a vibrating deflection of the vibratory system. Magnitude
and location of such deflection also depend on the axial distance of the point of application of
the forces relative to the node of vibration.
Fig. 7a
illustrates that the vibratory system
responds in opposite direction of the forces applied if they are applied right of the node of
Seite 6 von 99
Содержание Snap-on Y2k
Страница 1: ...SERVICE of the Y2k balancing platform Seite 1 von 99 ...
Страница 2: ...The vibratory assemblies of the Y2k balancing platform L R L R S S M Seite 2 von 99 ...
Страница 10: ...S S M Fig 12 Two systems arranged one above the other with a parallel pair of springs Seite 10 von 99 ...
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Страница 35: ...Seite 35 von 99 ...
Страница 66: ...Seite 66 von 99 Figure 1 JBEG B9000 B9450 User Interface ...
Страница 67: ...Seite 67 von 99 Figure 2 JBEG B9460 User Interface ...