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SIPLACE HS-50/HS-60/D4/S-25HM/S-27HM/HF -Series 2 Retrofit instructions for vacuum pump 07/2011 Edition 55 V acuum curves 2 2 2 2 Vacuum [mbar] Number of open nozzles Gantry 1 Gantry 2 Vacuum curve for S27HM with ELMO 2B…

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2 Retrofit instructions for vacuum pump SIPLACE HS-50/HS-60/D4/S-25HM/S-27HM/HF-Series
07/2011 Edition
54
The reason for not reaching these values mostly is a hose in the area of placement head which is
nit attached till stop position: 2
: Impress all hoses with the hose pliers and repeat the measurement of vacuum.
2.7.2.2 Check of the air flow of the vacuum system holding circuit
The correct air flow can be controlled by means of the vacuum curves: 2
: Remove the nozzles from the placement head (to achieve maximum air flow), open in SITEST
all segments in pickup position one after each other and turn it with star cycle into the holding
circuit.
: The vacuum measurement in the holding circuit shows with every additional opened nozzle a
vacuum decrease of 60 - 90 mbar.
2
2
With six open nozzles the vacuum could reduce, e.g. from 880 mbar to 520 mbar (reduction
360 mbar).
With six C&P placement heads at two placement machines on two vacuum pumps the decrease
is higher, at only one placement machine lower (four or two C&P placement heads). 2
2
2
2
SIPLACE HS-50/HS-60/D4/S-25HM/S-27HM/HF-Series 2 Retrofit instructions for vacuum pump
07/2011 Edition
55
Vacuum curves 2
2
2
2
Vacuum [mbar]
Number of open nozzles
Gantry 1
Gantry 2
Vacuum curve for S27HM with ELMO 2BL 1 1000 vacuum pump and 720 nozzles
Gantry 1: 6-segment head / Gantry 2: 12-segment head
Relative Vacuum [mbar]
Number of open nozzles
Vacuum curve for HS60 with ELMO 2BL 1 1000 vacuum pump and 914 nozzles
12-seg. head, gantry 1
12-seg. head, gantry 2
12-seg. head, gantry 3
12-seg. head, gantry 4
2 Retrofit instructions for vacuum pump SIPLACE HS-50/HS-60/D4/S-25HM/S-27HM/HF-Series
07/2011 Edition
56