CEMB USA C29_2 (B) - Manual (Page 13)

I 0533 - 13 GB
5.5 - Out of balance optimization
- This function serves to reduce the amount of weight to be added in order to balance the wheel.
- It is suitable for static unbalance greater than 30 g. (the led
OPT.
comes on ).
- It improves the residual eccentricity of the tyre.
RIM
POSITION
TYRE
POSITION
- With a piece of chalk make a reference mark on the flange and the rim
- With the aid of a tyre remover, turn the tyre on the rim by 180°
- Refit the wheel in such a way that the reference marks on the rim and the flange
coincide.
- Perform a manual spin
- RH display: percentage reduction value
- LH display: actual static unbalance value which can be reduced by rotation
- Mark the two positions of the rim and tyre, and turn the tyre on the rim until the
positions correspond in order to obtain the optimization on the display.
CANCEL OPTIMISATION IN ANY PHASE
Unbalance already measured
No previous
unbalance
measurement
unbalance measurement
Perform a manual spin
Initial unbalance
Possible approximations
residual static residual static residual static residual static
With conventional
wheel balancer
Choice with
minimum static
residual
5.6 - Automatic minimisation of static unbalance
This program is designed to improve the quality of
balancing without any mental effort or loss of time
by the operator. In fact by using the normal com-
mercially available weights, with pitch of 5 in every 5
g, and by applying the two counterweights which a
conventional wheel balancer rounds to the nearest
value, there could be a residual static unbalance
of up to 4 g. The damage of such approximation
is emphasized by the fact that static unbalance is
cause of most of disturbances on the vehicle.
This new function automatically indicates the
optimum entity of the weights to be applied by
approximating them in an “intelligent” way according
to their position in order to minimize residual static
unbalance.
phase shift