Check Belt Tensioning; 0_10 (Analogical); Signal Of The External Pick-Up; Signal Of The Internal Pick-Up - Bosch WBE 4200 Instructions De Réparation

¶
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
0 2050
1 2050
2 2050
3 2050
4 200
5 200
6 200
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;
Robert Bosch GmbH
Description
Reading of the analog entry of
the external pick-up
Reading of the analog entry of
the internal pick-up
Reading of the analog entry of
the external enlarged pick-up
Reading of the analog entry of
the enlarged internal pick-up
Reading of the sensor of the
distance
Reading of the sensor of the
width
Reading of the sensor of the
diameter
Auto-diagnosis menu | WBE 4200 | 47
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
One of the pick-ups reached
the saturation point: the
tension is 0 or 4095.
You can see the difference
between the rest values: ex.
Internal 2050 (from 2000 to
2100 OK) - External 1900.
The machine often needs to
be set.
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:
en
Correction
R
Substitute the board.
R
Substitute the pick-up.
R Reposition the pick-ups.
R
Substitute the pick-up (in
our case the external one).
R
Reposition the pick-ups.
R
Substitute both the pick-
ups.
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1 695 600 091 2012-11-16