31 9.3 Measuring Unbalance; 31 9.4 Attaching Balance Weights; Splitting Balance Weights - Bosch WBE 4230 Notice Originale

en 42 | WBE 4230 | Wheel balancing
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The rim distance is not displayed. Correct storage
of the value can be checked by pressing the <RIM
DISTANCE> key.
2. Apply the electronic gauge arm for rim width to the
rim.
651012-32_Sr
 The measurement location display depends on the
balancing program selected.
 Storage of the position is confirmed by an acou-
stic signal and the position data are displayed.
"
The rim diameter and rim width values have now been
read in and are shown on the display. All the necessary
rim data have been recorded.
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Refer to Section 11 if the values are not read in
automatically.
9.3 Measuring unbalance
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A wheel can only be correctly balanced if all the set-
tings correspond to the mounted wheel.
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Measurement can be stopped at any time:
$
Press the <STOP> key.
$
Press the pedal.
$
Open the wheel guard.
1. Close the wheel guard.
 The unbalance measurement commences automa-
tically.
 On completion of measurement the values of the
balance weights required are shown on the dis-
play.
On left of display inner balancing plane,
on right of display outer balancing plane.
2. Open the wheel guard.
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9.4 Attaching balance weights
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If great unbalance is measured at the wheel (e.g.
static unbalance greater than 50 g), it is advisable to
perform wheel matching by using the unbalance of
the rim to provide compensation for the static unba-
lance of the tire (unbalance minimization).
9.4.1 Splitting balance weights (split program)
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Start the split program after measurement if the
balance weights are to be attached behind one or
two spokes.
1. Press the <SPLIT> key.

appears on the left in the display and the num-
M
ber of currently specified spokes on the right.
 The SPLIT symbol (LED Fig. 3, Item 5) flashes.
2. Use the keys <-> or <+> to enter the number of spo-
kes.
 The value appears on the right in the display.
3. Turn a spoke to the 12 o'clock position and press the
<SPLIT> key.
 The position of the spoke is stored.
 The SPLIT symbol lights.
 The value of the balance weight required appears
on the right in the display.
4. Turn the wheel by hand.
 The green arrow (LED Fig. 3, Item 12) lights as
soon as the position for attaching the balance
weight has been attained. The correct position
(behind a spoke) is confirmed by an acoustic sig-
nal.
5. Attach a balance weight with the necessary value at
the upper perpendicular 12 o'clock position of the
wheel.
6. Give the wheel another turn by hand to attach a
further balance weight behind a spoke (if the value
displayed is lower than the initial value).
 The SPLIT symbol lights.
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For 2 balancing planes, repeat the procedure for the
2nd balancing plane as of step 4.
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Press the <SPLIT> key again to terminate the split
program and to obtain a balance weight display.
Robert Bosch GmbH