wallPen E2 | User Manual
102
Ink System
8.3 Ink Refill
The printheads and ink system are the most sensitive components of the wallPen.
Generally problematic with any inkjet system is the handling of air, especially how to
keep it away from the printhead nozzles. As soon as air gets into the piezo elements of
the printheads, the nozzles become clogged and can no longer shoot ink. Therefore, it
is very important to keep air away from the printheads.
The wallPen E2 uses aluminum bags as tanks, which can be refilled cleanly and quickly
from bottles at the back of the printhead housing.
Proceed as follows:
1. Working in a clean environment, prepare all necessary components:
a. A bottle with sufficient wallPen UV ink with a short hose and connector.
b. Some damp cleaning wipes.
2. Remove the red cap on the back of the print head of the desired color.
3. Open the cap of the bottle with the corresponding ink.
4. Hold the bottom of the bottle low with the connector facing up
5. Squeeze it slightly (without letting ink flow out) and bend, turn and so connect the
adapter tube on the bottle to the corresponding refill connector.
6. Lift the bottom of the bottle far up and do not squeeze the bottle any more. The
resulting vacuum will now suck any air - and possibly some ink - from the bag into
the bottle).
7. Once this air is removed, slowly squeeze the bottle and now squeeze as much ink
into the bag as desired.
8. Continue to keep the bottle plugged in while you wiggle the bag slightly with your
other hand and slowly stop squeezing the bottle.
9. Continue this "squeeze / release" procedure until you no longer hear air entering
the bottle.
10. Leaving the bag untouched, lower the bottom of the bottle back down and rotate
the bottle along with the hose connector from the rear port of the print head.
11. You will now hear air entering the bottle to relieve the vacuum inside. Now be
prepared for some ink drops to come out of the two open ports.
12. If you want to add more ink than you were able to do in this one pass, repeat the
above steps from No. 4 until the bag is filled to your satisfaction.
13. Close the ink port outlet on the printhead housing and the bottle port with the two
caps.
NOTE 1
If too much ink has been filled, use the same "vacuum technique" described above to
remove excess ink from a bag by connecting a squeezed bottle to draw excess ink
from a bag back into the bottle.
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