00196433-02_AI_Vakuumpumpe_X-Serie_70XDE+EN.pdf - 第126页
Assembly instructions: Vacuum pump for SIPLACE X-se ries 04/2009 Edition 126 2.12 Preventive maintenance 2 Please also read th e user manual from the vacuum pump ma nufacturer , Becker (see appendix) . 2 2 We recommend: …
Assembly instructions: Vacuum pump for SIPLACE X-series
04/2009 Edition
125
On the other hand, in the vacuum test on the holding circuit with closed nozzles the value dis-
played may be different if the vacuum board has an offset. It is therefore a good idea to take the
measuremen
ts at the head and vacuum distributor using the same measuring device. 2
2
With a vacuum pump connected in the holding circuit, the vacuum value with closed nozzles
is normally approx. 200 to 300 mbar lower than with a Venturi generator in the pick-up circuit
(each measured with an external device at an (open) nozzle in the pick-up circuit and an (open)
nozzle in the holding circuit). 2
If the above values are not achieved, the cause is generally a ho
se that is not pushed on fully in
the vicinity of the head. Follow these steps: 2
: Use the tubing nippers to make sure that all the hoses are pressed on correctly
: Repeat the vacuum measurement.
2.11.2.4 Checking that the vacuum system for the C&P6/12 holding circuit is working overall
In contrast to the C&P20 head, the flow rate here can be correctly checked with reference to the
vacuum characteristic. 2
Follow these steps: 2
: Remo
ve the nozzles from the placement head (to achieve the maximum flow rate).
: In SITEST, open each segment when it moves into the pick-up position and turn it by cycling
the star
into the holding circuit.
The vacuum measurement in the holding circuit should show a vacuum drop of approx. 10-30
mbar for
each additional opened nozzle. 2
2
If there are six nozzles open, the vacuum could drop from -580 mbar to -500 mbar, for example.
Since the C&P20 and C&P6/12 heads can be combined as required on the same or different
placement machines (head modularity), it is impossible to set a fixed threshold for a minimum per-
mitted vacuum. When C&P20 heads are used in mixed mode, the drop in vacuum is generally
much greater
than when C&P6/12 heads alone are used. 2
Assembly instructions: Vacuum pump for SIPLACE X-series
04/2009 Edition
126
2.12 Preventive maintenance
2
Please also read the user manual from the vacuum pump manufacturer, Becker (see appendix).2
2
We recommend:
Every month
Check that the vacuum hoses are run cor-
rectly on the gantry (they must run at a dis-
tance, parallel to the cable and hose carrier
otherwise
there is a risk that the cable and
hose carrier or the hoses themselves will be
damaged.) 2
Every 4 months
Orifice ring, complete,
C&P20 Check for soiling and replace if necessary
Item no.: 03046344-xx
Vacuum filter F10 Check and replace if necessary
Item no.: 03070370-xx
Every 3 years
Filter insert Check and replace if necessary
Item no.: 03077677-xx
Set of pushers Check and replace if necessary
Item no.: 03077679-xx
2
2
2
The filter insert and set of pushers have a service life of 25,000 hours. 2
2
2
2