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dx4 printhead under microscope

Discussion in 'Roland' started by Tyler Durden, Oct 22, 2012.

  1. Tyler Durden

    Tyler Durden Member

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    I could not find any pics online so I thought maybe I should post this.
    Under the microscope I can see the discoloration around some of the nozzles, also I can see the fluid come through each nozzle when I push a little solvent through.
     

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  2. Robert M

    Robert M Very Active Member

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    Scope

    What power is that magnification ?
     
  3. Tyler Durden

    Tyler Durden Member

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    Oct 17, 2012
    120x

    40$ celestron microscope from amazon.
     
  4. Jack Knight1979

    Jack Knight1979 Very Active Member

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    I imagine that delamination causes nozzle deflection and clogging. That material that has come lose is the hydrophobic coating. Right?
     
  5. Tyler Durden

    Tyler Durden Member

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    Oct 17, 2012
    Not sure what the cause of the discoloration is, It looks to be ok, I dont see any delamination, although its just not that easy to see.

    Im not sure on specifics that the nozzle could even delaminate around the holes. Theres just not much data I could find online about the material, thickness etc. Im sure epson would know what this is.

    It does seem that based on the nozzle size that cleaning directly with a swab would not cause any harm.

    I could see the nozzles becoming clogged if your swab or wipers have ink goo on them and inturn you end up pushing that goo into the holes. These holes are just so small that it wont take much to clog one. Even the smallest of particles flowing though the head would clog it and the only way to clear would be to reverse flow.
     

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  6. Tyler Durden

    Tyler Durden Member

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    Oct 17, 2012

    After further testing, yes it appears the coating is missing in the discolored areas! The coating looks to give the head a darker matte finish as opposed to the lighter shinny finish underneath. Im not sure if it offers any protection to the surface.
     
  7. Robert M

    Robert M Very Active Member

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    coating

    When you gently push cleaning solution through the head are the nozzels firing straight down or deflecting off to the sides
     
  8. Tyler Durden

    Tyler Durden Member

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    Oct 17, 2012
    Thats a good question, I had a squeeze bottle hooked up and roland cleaner and it just drips out, I cant get it to spray or stream.

    I was wondering myself if this cleaner was too viscous to spray out, I did not want to put too much pressure but I think I was putting alot and just getting some flow.
     
  9. Jack Knight1979

    Jack Knight1979 Very Active Member

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    It takes a good amount of force to make the fluid jet. You're not pushing hard enough.
     
  10. Tyler Durden

    Tyler Durden Member

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    Oct 17, 2012

    I got a little pump going now and I am getting the spray streams.
    Here are some pics of the black head. It is spraying all around like a sprinkler. It looks like it has some damage.
     

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