00195166-0402_SM_D4_EN - 第235页
Settings Performing a Vacuum Test on the C&P 6/12 DLM Heads C&P12 Service Manual SIPLACE D4 235 Vacuum test with closed nozzle X Start SITEST and perform the first refere nce run, if requ ired. X Select th e gant…
Settings
C&P12 Performing a Vacuum Test on the C&P 6/12 DLM Heads
234 Service Manual SIPLACE D4
6.3.12 Performing a Vacuum Test on the C&P 6/12 DLM Heads
Damage to the valve plunger, silicone hose, the vacuum plate, in or on the nozzle can lead to leakage
which may then cause malfunctions during the placement process or which may reduce the vacuum
value in the holding circuit.
Vacuum test with normal nozzle
configuration
The vacuum tests for C&P6/12 in the station
software of the C&P12/6 placement heads
only checks the area from the vacuum
generator to the valve plungers.
The area visible here (red frame), from the
valve plunger housing via the silicone hose
into the segment housing and through the
sleeve to the nozzle is not covered by the
normal vacuum test.
Equipment required
Closed nozzle tips are required for checking the
complete vacuum circuit.
The special nozzle use for this is marked red and
does not have a nozzle configuration on it:
SOKO nozzle for vacuum test DLM, Item No.
[03067029-01]
Settings
Performing a Vacuum Test on the C&P 6/12 DLM Heads C&P12
Service Manual SIPLACE D4
235
Vacuum test with closed nozzle
X Start SITEST and perform the first reference
run, if required.
X Select the gantry for the required vacuum test
on the C&P6/12 placement head.
X Place all the nozzles for the placement head in
the nozzle changer.
X Replace the full magazine at one magazine
position with the magazine holding the test
nozzles [03067029-01].
X Go to the Nozzle on head for segment 1 menu
and select the nozzle type which was originally
configured for this magazine position.
X Select the checkbox
All segments as
segment 1
X Pick up the vacuum test nozzles with all
segments.
X Select the vacuum test menu and perform a
vacuum test.
X The error message
Vacuum difference open/
closed too low
can be ignored here.
As you can see in the measurement values
here, the
Open
values deviate by up to 3mbar
from the
Closed
values.
However, this is within the tolerance of 5
mbar, in which correct function can be reliably
assumed.
X If this tolerance value is exceeded, check the
valve plunger and vacuum plate and replace
these a a precaution, if necessary.
Scenario 1
Example of faulty vacuum values, which indicate a
damaged vacuum plate at segment 2 here.
NOTE: Irreparably damaged vacuum
plate
If both measurements for a particular
segment are around 640mbar, this
indicates that the vacuum plate is
irreparably damaged.
Settings
C&P12 Performing a Vacuum Test on the C&P 6/12 DLM Heads
236 Service Manual SIPLACE D4
Scenario 2
Example of defective vacuum values, which
indicate a damaged silicone hose on segment 1
and an open nozzle at segment 3.
NOTE: Silicone hose defect
Under certain circumstances, silicone hose defects might only be detected when the segments
are moved out. It could therefore be advisable to release the Z axis and to perform a vacuum
test of the segment in its lowered state (single measurement run).
NOTE: Missing valve plunger
If both measurements for a particular segment are only around 210mbar, this indicates that the
valve plunger is missing.
Vacuum values and valve plunger
positions
If the valve plunger is in the position "nozzle
open", the vacuum area will be sealed against
the environment with two seals.
If the valve plunger is in the position "nozzle
closed", the vacuum area (at the rear, near the
drive) will be sealed against the environment
with only one seal.
If the "vacuum value closed" is too low, this
indicates that the seal is not sufficiently greased or
that it is damaged.