32 8.5 Measuring Unbalance - Sicam SBM 55 NW Manual Original

1. Position the weights positioning gauge stop (8) on
the rim edge.
2. Move the outer weight pliers (5) to the position at
which the balance weights are to be attached.
3. Lock the detected measurement by tightening the
thumbscrew (7) and detect the value in position "J"
on the millimetric scale;
4. Using the <-> or <+> key for rim width, enter the de-
tected rim width value in the "mm" unit
"
All the required wheel data have been recorded.
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Balancing a wheel | SBM 55 NW | 45
8.5 Measuring unbalance
i
A wheel can only be correctly balanced if all the set-
tings correspond to the mounted wheel.
i
The automatic start is activated. In the following
description.
i
Measurement can be interrupted at any time by pres-
sing <STOP>.
1. Close the wheel guard.
 The imbalance measurement starts automati-
cally, if set to start automatically, otherwise press
<START>;
2. On completion of measurement the values of the
balance weights required are shown on the display.
$
left display for internal balancing plane;
$
right display for external balancing plane.
3. Open the wheel protection cap only when the wheel
has completely stopped.
i
. If the imbalance measured on the wheel is very high
(e. g. static unbalance exceeding 50 g) it is recom-
mended to perform optimisation procedure through
which the static imbalance of the tyre is balanced
with the static imbalance of the rim (minimisation of
the imbalance, see chap.9).
en
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