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Maschinenvertrieb
LIYU DMS GmbH
www.liyu-dms.com
45
info@liyu-dms.com
In view of the power of cleaning fluid pump, it is suggested that you clean
a single print head every time. First, put the three-way valve of single print head
at purging state with other print head valves off, then unscrew corresponding
two-way valve, press purging button and make the cleaning fluid flow out from
two-way valve, clean the pipelines of this part. About one or two seconds later,
tighten two-way valve and make the cleaning fluid cascade out from nozzle for
about five seconds. clean other print heads according to the above method. Five
minutes later, clean all the print heads again as per the above method. Thus
print head cleaning is completed.
Print head cleaning operation involves cleaning fluid pump directly pumping
cleaning fluid to clean the print head, without any positive pressure, so
pneumatic three-way valve body operation is not required.
Venting of print head:
Inject ink into the print head after cleaning print head. Venting operation shall
be conducted together with ink injection with the specific operation process as
follows:
1. It is also suggested that you conduct venting for every single print head,
that is to say, venting operation is conducted for only one print head every
time with valve body of other print heads off.
2. First of all, put the corresponding three-way-valve in working state and at
the same time place pneumatic three-way valve body in positive pressure
state.
3. Unscrew the corresponding two-way valve core to ensure smooth ink outlet.
Press positive pressure button and impress ink from the auxiliary ink tank
into the print head, then ink will flow out from two-way valve core. Observe
the ink flow state at the ink outlet. If the ink flows down vertically without
any bubbles around, you can tighten two-way valve so that ink will flow out
from the nozzle. (Tips: it may take long to impress ink for the first time with
such long pipelines, moreover, there is no sufficient ink in the auxiliary ink
tank, please hold on for a while after positive pressure so as to enable ink
supply system to refill the auxiliary ink tank and then continue positive
pressure).
4. Carry out the above operation for every print head in succession. Place all
three-way valves in working state after completing venting for all print
heads. Press positive pressure button and impress ink for all print heads
again, then complete ink injection of print heads.
5. Meanwhile, in case of bubble found in ink tube leading to print head, which
affects ink out of the print head, the above method can also be adopted to
carry out venting operation.
Positive pressure ink