1 695 600 091 2012-11-16| Robert Bosch GmbH
Auto-diagnosis menu | WBE 4200 | 47 en
¶ If the wheel does not turn listen if, by activating the
cycle, a "click" from the relays is emitted from the
power board.
7.3.1 Check belt tensioning
To check the tensioning of the transmission belt, use
the tensiometer for optibelt TT mini S belts (nominal
value: 110 ±10 Hz).
7.4 0_10 (Analogical)
i
Page for the monitor of analog entries.
From this menu you can directly read the signal that
comes from the sensors (pick-ups and potentiometers).
This means that you can identify the cause of the
defect.
Here you have a summary of the functions:
Left Display Right Display Description
0 2050
Reading of the analog entry of
the external pick-up
1 2050
Reading of the analog entry of
the internal pick-up
2 2050
Reading of the analog entry of
the external enlarged pick-up
3 2050
Reading of the analog entry of
the enlarged internal pick-up
4 200
Reading of the sensor of the
distance
5 200
Reading of the sensor of the
width
6 200
Reading of the sensor of the
diameter
7.4.1 0 - Signal of the external pick-up.
The piezoelectric sensor reads a strength variation.
During the checking phase, verify that:
R the value of rest is in the middle of the reading scale;
R if you push the shaft down, the value increases up to
the end of the scale;
R if you lift the shaft up, the value decreases to zero.
7.4.2 1 - Signal of the internal pick-up.
Now the sensor is mounted in the other position.
During the checking phase, verify that:
R the value of rest is in the middle of the reading scale;
R if you push the shaft down, the value decreases to
zero;
R if you lift the shaft up, the value increases up to the
end of the scale.
Fig. 9: Sensor
NOTES OR THE ASSISTANCE:
The sensors (code 654432) are identical and in order to
distinguish them during the production, they mount the
red pick-up outside and the black one inside.
Here you can find some examples and possible
solutions:
Defect Correction
One of the pick-ups reached
the saturation point: the
tension is 0 or 4095.
R Substitute the board.
R Substitute the pick-up.
You can see the difference
between the rest values: ex.
Internal 2050 (from 2000 to
2100 OK) - External 1900.
R Reposition the pick-ups.
R Substitute the pick-up (in
our case the external one).
The machine often needs to
be set.
R Reposition the pick-ups.
R Substitute both the pick-
ups.
i To replace the pick-ups, see chap. 9.5 .
7.4.3 2 e 3
These values always refer to the tension detected by
the pick-ups, but in this case it is enlarged and filtered
by the board.
During the checking phase we don’t care about these
electric signals because they are just necessary to
calculate the unbalance.
7.4.4 4 - Signal of the potentiometer of the distance
i The potentiometer that we use is a multiturn
potentiometer which means that the shaft must
make more than a single turn to go to the other side
of the stroke.
NOTES OR THE ASSISTANCE:
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