Bosch WBE 4100, Repair Instructions

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1 695 656 135 2011-01-12
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Robert Bosch GmbH
Auto-diagnosis menu | WBE 4100 | 2� WBE 4100 | 2� | 2� en
is, that the difference is 180°. The crests of a signal are
lined up with the troughs of the other and vice versa.
Fig. 4: Ratio between the tensions measured by the pick-ups
To enter the test menu press "SET“ until the notice
“TST” appears on the left display and then press "MM/
INCH” (1.5s Max). Now the display will show the notice
“Msr”.
If you press + DISTANCE, you will see on the displays
both the values in sequence read by the pick-up during
the last launch and the phase angle shown in degrees.
In order to monitor if the pick-ups work correctly, follow
these instructions:
1. mount a test wheel on the machine (14-15” of iron)
and balance it perfectly;
2. apply a single test weight outside (for example 100g)
and make a test launch.
At the end, check the values: the tension value of the
internal pick-up must be always less than the tension
value of the external pick-up. The internal one must go
between 1.2 and 1.8.
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.: 384 1° value shown: tension
measured by internal pick-up
ex.: 603 2° value shown: tension
measured by external pick-up
ex.: 179 ex.: 580 3° value shown: angle of dif-
ference of phase
ex.: 2 4° value: rounded off ra-
tio between the pick-ups
NOTES FOR THE ASSISTANCE:
If we check the ratio between the pick ups and the dif-
ference of phase and we find values out of tolerances,
we must substitute the board (chapter 9) or substitute
the sensors of the pick-ups (chapter 8.4.2).
8 .2 Enc
It indicates the function to directly check the encoder:
the number of spaces goes from 0 to 255.
To enter the menu, when you see Test (see above),
press "SET” again.
Left Display Right Display Description
Enc It shows the position of the
encoder from 0 to 255
NOTES FOR THE ASSISTANCE:
The malfunctioning of the tool is detected automatically
by the programme that will show on the display “Err
10” or “Err 11”, showing also on the board the notice
“enc”. Verify the cause of the defect to correct the
problem properly (see the picture).
Defect Correction
The machine
does not get at
256 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 (code 653272).
8 .� Sp
The abbreviation indicates the function that directly
controls the speed that (turns/minute) the shaft
achieves. If you close the carter and press “START”, it
is possible to check the speed achieved during the bal-
ancing phase (167±5 turns/minute).
Left Display Right Display Description
SP Speed in turns/minute of the shaft
NOTES OR THE ASSISTANCE:
Here you can find the most common defects of the en-
gine:
Defect Correction
The wheel does
not turn.
R
Check the electric connections.
R
Substitute the engine (code 654370).
The engine
does not achieve
the balancing
speed. Check
that the encod-
er is connected.
R
Check the tension of the drive.
R
Substitute the engine (code 654370).