CEMB USA C88 EVO (C) - Manual (Page 19)

19
30 8°
FRONT VIEW LATERAL VIEW
mm
A
B
Use and maintenance manual Rev. 02-2010
ENGLISH
to go to a frame where important information
on eccentricity is displayed, among which the
unbalancing effect the fi rst harmonic eccentricity
measured at an average speed of 75 miles/h
may have.
to return to the unbalance measure
ment frame;
balancing run.
5.11.1 SONAR LR positioning instruction
(lateral eccentricity) (option)
In order to obtain the correct lateral eccentricity values, the
sonar cone must be positioned inside the tyre shoulder. The
function of the LED is to make it easier to position the sonar
correctly, but always bear in mind that it does not indicate
the focus of the pad as it is situated 30 mm further down.
Correct positioning is highlighted on the screen by a specifi c
icon turning green.
The rim eccentricity measurement is important in order to
try and reduce the total eccentricity of the wheel simply by
turning the tire on the rim.
Press the button ▪ from the eccentricity graph
display frame
Hold the gauge as shown in Photo A in such a way that ▪
it does not turn during the measurement
Rest the round part of the gauge tip inside the rim as ▪
shown in Photo B.
Press the ▪ button and slowly turn the wheel by
hand, keeping a constant pressure on the gauge tip.
The total eccentricity, the rim and the tire values are simul-
taneously showed. Before passing to tire rotation on the
rim, check that the rotation result indicated on-screen is
within tolerance. It is possible to set the minimum correc-
tion limit below which it is never considered appropriate to
intervene (
MINIMUM CORRECTION LIMIT ), and the
maximum fi rst harmonic eccentricity limit of the rim below
which it is considered of little use to turn the tire on the rim
(
FIRST HARMONIC LIMIT
).
The following buttons are enabled:
prints the eccentricity values measured (option)
returns to the eccentricity graph display frame.
returns to the measurement screen.
Use of the wheel balancer