CEMB USA C71_2 (A) - Manual (Page 12)

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I 0439 - 12 GB
Initial unbalance
phase shift
Possible approximations
residual static r esidual static residual static
Choice with minimum
static residual
With conventional
wheel balancer
residual static
5.8 - Automatic minimization 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 commercially
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, resident in the machine,
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.
6 - Set up
6.1 - Autodiagnostics
performs tests useful for maintenance staff
6.2 - Autocalibration
For autocalibration proceed as follows:
- Fit a wheel with steel rim of average dimensions on the shaft. Example 6” x 14” (± 1”)
- Set the exact dimensions of the wheel mounted.
CAUTION !! Setting incorrect dimensions will result in the machine not being properly calibrated and hence all the
subsequent measurements will be incorrect until a new autocalibration is performed with the correct
dimensions!!
N.B.: Use steel wheel rims detection from “ MANUAL DIMENSION PRESETTING ”.
- Perform a spin under normal conditions.
- Add a 100 g. sample weight (3.5 oz) on the outside in any angular
position.
- Shift a 100 g sample weight from the outside to the inside keeping
the same angular position.
- Turn the wheel until the 100 g weight is in the 12 o’clock position.
END OF AUTOCALIBRATION
CANCEL AUTOCALIBRATION IN ANY PHASE.