Wbe 4100 Calibration; Reference Measurement - Bosch WBE 4100 Originalbetriebsanleitung

12.3.3

WBE 4100 calibration

i
Sound and automatic start are active in the following
description (refer to Section 10).
1. Attach a motor vehicle wheel of medium size (e. g.
width 5.5", diameter 14") and in very good condition
to the flange.
2. Enter the wheel data (refer to Section 8.2).
3. Close the wheel guard.
 Measurement commences.
4. Enter the balance weight (automatically proposed
value is 60 g).
 Left-hand display shows
shows
60.
 The new value is displayed on altering the balan-
ce weight.
5. Attach a balance weight of the value entered to the
inner side of the wheel.
6. Close the wheel guard.
 Measurement commences.
7. Turn the wheel until the balance weight is in the
12 o'clock position.
8. Remove the balance weight from the inner side of
the wheel and attach it to the outer side (12 o'clock
position).
 Left-hand display shows
9. Close the wheel guard.
 Measurement commences.
10. Turn the wheel until the balance weight is in the 6
o'clock position.
 Left-hand display shows
 The calibration angle value is displayed.
11. Press the <SPLIT> key.
"
This completes calibration.
i
The calibration made is permanently stored automa-
tically.
Robert Bosch GmbH
, right-hand display
C-3
.
C-4
C-5.
Maintenance | WBE 4100 | 41
12.3.4

Reference measurement

i
Exact centering of the wheel is a basic prerequisite
for this reference measurement and for all balan-
cing operations.
i
Sound and automatic start are active in the following
description (refer to Section 10).
1. Attach a motor vehicle wheel of medium size (e. g.
width 5.5", diameter 14") and in very good condition
to the flange.
2. Enter the wheel data (refer to Section 8.2).
3. Close the wheel guard.
 Measurement commences.
4. Create an artificial unbalance by attaching a test
weight of e. g. 60 g to one of the two sides.
5. Close the wheel guard.
 Measurement commences.
 The WBE 4100 must display precisely this unbalance
(value and position) on this side. The value indicated
for the other side must not exceed 5 g.
i
To check the position of the unbalance, turn the
wheel until the position recommended for attach-
ment of the balance weights is attained. The test
weight attached must be vertically beneath the axis
of rotation (6 o'clock position).
!
Calibration must be repeated in the following cases:
$
Deviation from specified unbalance value
(greater than 1 g on test weight side, more than
5 g on other side).
$
Deviation from specified unbalance position (test
weight not between 5:30 and 6:30 position).
6. Remove the test weight.
7. Release the wheel and turn it through approx. 35°.
8. Re-attach the wheel.
9. Close the wheel guard.
 Measurement commences.
"
On completion of this reference measurement, the
display must not exceed a maximum unbalance of 10 g
per side (15 g for particularly heavy wheels). This error
may be caused by the rim centering tolerances. If this
reference measurement indicates greater unbalance,
the components used for centering the wheel must be
checked for wear, play and contamination.
en
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1 695 656 133 2011-02-18