00196101-04_Serviceanleitung Vakuumtest 08-2018_D-E - 第77页
Service manual vacuum check with closed nozzles Page 77 fr om 136 4.2.3 Vacuum test with normal nozzl es (calibration nozzle ) The vacuum tests in the sta tion sof tware for CP 20 hea ds check the follo wing: 1. open / c…
Service manual vacuum check with closed nozzles
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4.2.2 Venturi- / Vacuum pump – System:
Basically all mentioned C & P20x - head types can be operated with Venturi nozzle, as well as
with vacuum pump. For each a corresponding conversion kit is offered.
For heads operated with a vacuum pump, the vacuum values for the values "open", "closed" and
"holding circuit" are expected to be around 30-70mbar lower.
C&P20 / C&P20a / C&P20m – heads are predominantly found with Venturi system,
C&P20p / C&P20m2 – heads are mostly available with a vacuum pump.
For C&P20 / C&P20a / C&P20m – heads, the vacuum for the holding circuit is measured at
position 12.
For C&P20p / C&P20m2 – heads the vacuum for the holding circuit is measured at position 11.
NOTE
Vacuum with Venturi nozzles in the holding circuit
In a venturi nozzle system, the vacuum in the holding circuit is generated separately for each
individual segment with venturi nozzles.
In case of use ot a vacuum pump, the vacuum is supplied jointly to all segments on the head
directly from the main connection.
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4.2.3 Vacuum test with normal nozzles (calibration nozzle)
The vacuum tests in the station software for CP 20 heads check the following:
1. open / closed (Pos. B) - measurement is made from the nozzle tip to the pressure control valve.
Vacuum values = pressure control valve + holding circuit
2. holding circuit (Pos. C) - measurement is made from the nozzle tip to the holding circuit sensor.
Vacuum value = holding circuit
Figure 4-6
Figure 4-7
Schematic representation of the
Vacuum-/ air kiss principle, at the
example of a C&P20p - head with
vacuum pump operation. (pick up)
Schematic representation of the
vacuum-/ air kiss principle, at the
example of a C&P20a - head with
venturi-nozzle operation. (pick up)
Service manual vacuum check with closed nozzles
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The pictures below show the respective vacuum system based on sectional views of the head in
the 3D system.
Figure 4-8: Cut-view vacuum system with venturi-nozzles operation (C&P20a)
Figure 4-9: Cut-view vacuum system with vacuum pump operation (C&P20p)
Venturi nozzle
Silencer
Cover
Vacuum connection
Reflecting ring
(vacuum
distributor)