1 695 600 091 2012-11-16| Robert Bosch GmbH
46 | WBE 4200 | Auto-diagnosis menuen
In order to monitor if the pick-ups work correctly, follow
these instructions:
4. mount a test wheel on the machine (14-15” of iron)
and balance it perfectly;
5. apply a single test weight outside (for example 60g)
and make a test launch.
At the end of the control measurement
R the internal pick-up voltage value must be below the
external pick-up voltage value.
R the ration between the external pick-up value and
the internal pick-up value must be between 1.2
R and 1.8, the phase difference must be 180° ± 1°.
As you can see from the picture below, to calculate the
phase angle, you must divide the external pick-up value
by the internal one. In this way, you can get the ratio
(603 / 384 = 1,57).
Left Display Right Display Description
MSR
Press DISTANCE to roll down the
menu
ex.: 892
1° value shown: tension
measured by internal pick-up
ex.: 1384
2° value shown: tension
measured by external pick-up
ex.: 180 ex.: 810
3° value shown: angle of
difference of phase
ex.: 2
4° value: rounded off ratio
between the pick-ups
NOTES FOR THE ASSISTANCE:
If we check the ratio between the pick ups and
the difference of phase and we find values out of
tolerances, we must substitute the board (chapter 9.2)
or substitute the sensors of the pick-ups (chapter 9.5).
7.2 EN (Encoder)
It indicates the function to directly check the encoder:
the number of spaces goes from 0 to 199.
Left Display Right Display Description
En
It shows the position of the
encoder from 0 to 199
NOTES FOR THE ASSISTANCE:
The malfunctioning of the tool is detected automatically
by the programme that will show on the display Err22,
Err10 o Err11 showing also on the board the notice En,
Verify the cause of the defect to correct the problem
properly.
Defect Correction
The machine does
not get at 200
spaces.
R Check that there is no dust in the discs.
R Check that the discs are intact.
The machine does
not count any
space.
R Check that the encoder is connected.
R Substitute the encoder.
Fig. 7: Encoder
7.3 SP (Speed)
The abbreviation indicates the function that directly
controls the speed that (turns/minute) the shaft
achieves
Closing the wheel protection cap and pressing the <I>
key, it is possible to check the speed reached during
balancing.
Left Display Right Display Description
SP
Speed in turns/minute of the
shaft
NOTES FOR THE ASSISTANC E:
Here you can find the most common defects of the
engine:
Defect Correction
The wheel does
not turn.
R Check the electric connections.
R Replace the engine.
The engine does
not reach the
balancing speed.
R Check the tensioning of the
transmission belt.
R Check that the encoder is connected.
R Replace the engine
The wheel does
not brake (in
reverse).
R Check, and eventually replace, the
power board.
R Check, and eventually replace, the
condenser.
Fig. 8: Engine
i The functioning of the engine is completely managed
by the power board.
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