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Print head air purge 3-1
3.1 Print head air purge
If the makeup remains in the electrode section after cleaning or if you use the IJ
printer at a high humidity, moisture condensation may occur within the print head,
causing leakage from the deflection electrode section. It is also important to
remember that dust or splashed ink accumulation on the deflection electrode
section may cause leakage. Performing the following air purge procedure for the
print head interior is effective in preventing such leakage.
3. INSTALLATION CHECK ITEMS
If the air-purge amount is excessive, print irregularities may occur.
After air-purge pressure adjustment, be sure to perform a printing test to
verify the printing results.
(1) Situations requiring an air purge
When the printer is used in a highly humid place such as a beer or other beverage can line
(If you use the printer in an environment in which the relative humidity is 85% or higher,
complete the print head air-purge procedure).
When a water drainage blow sequence is performed before printing.
When the printer is used in a place where a considerable amount of paper powder or other dust
exists.
When the printing distance is short so that the end of the print head is splashed with ink.
When you use inks that are indicated on the handling guidance of each ink to complete
air-purge procedure.
(2) Air-purging procedure
Introduce clean dry air into the print head air purge connection port (Rc 1/8 (PT 1/8)×screw) in
the rear of the printer main body at a pressure of about 0.1 to 0.3 MPa. If it is possible that the
employed air tanks oil or water, turn it into clean dry air with an air filter, micro-mist separator, or
the like before introducing it into the printer main body.
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NOTICE
Max. tightening torque:1.5N m
Back of body
Print head air purge
connection port
Made of resin. Be careful not to
tighten too tightly when connecting
with a metal joint.
Air source
(clean dry air)
(capacity: Approx. 1L/min)
Pressure reducing valve
Pressure gauge
0.1
0.3MPa
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