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  • Few missing printer nozzles, advice please?

    Posted by Daniel Evans on November 15, 2018 at 11:22 am

    Just done a test print and the first Cyan has a few missing nozzles and a few I think you call deflected nozzles.

    I’ve done a few cleans and a couple of manual ones but the Cyan doesn’t budge, every other nozzle is fine.

    What can cause this, does it really effect my print and how can I fix it to get them back so I don’t lose them for good.

    I’ve looked at the head the best I can and there don’t appear to be any scratches on it or anything.

    Stafford Cox Stafford Cox replied 3 years, 6 months ago 7 Members · 17 Replies
  • 17 Replies
  • James Boden

    Member
    November 15, 2018 at 11:41 am

    Hi Daniel,

    I’d try a head soak on this. If you search youtube or the forum you should find the info you need.

  • Chris Wilson Chris Wilson

    Member
    November 15, 2018 at 1:01 pm

    Yea head soak it then a few powerful cleans and then a normal clean. That should blast it it.. hopefully

  • Daniel Evans

    Member
    November 15, 2018 at 1:48 pm

    Thanks guys

    How long would you recommend for a head soak?

    I just watched a video and they said anywhere from 20 minutes to 24 hours?

  • Joe Killeen Killeen

    Member
    November 15, 2018 at 1:51 pm

    Hi Dan
    You could get this head cleaner kit from Digiprint Supplies works a treat and simple to use.
    I haven’t replaced a head since I got one about three years ago, before that I was replacing a head or two a year.
    Around every two to three months I give the printer a good clean and a quick head wash.
    Joe


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  • Daniel Evans

    Member
    November 15, 2018 at 3:30 pm

    Joe

    When you say a good clean, what do you do exactly?

    I like the idea of the head wash kit.

  • Joe Killeen Killeen

    Member
    November 15, 2018 at 10:14 pm

    Hi Dan
    Just do a maintenance clean, wipers, cap tops and all the area around there, blow out dust with air. Pinch rollers, platin gets a small build up of glue (print a good bit of high tac vinyl) only takes about 30 minutes if done regularly.
    Joe

  • Myriam Garrido

    Member
    November 17, 2018 at 12:54 pm

    The head cleaning kit from Digiprint I’d avoid personally. The internals of a DX head are really delicate and you can easily damage it beyond repair if too much pressure is applied (product of experience as we’ve used one of these before !) Roland don’t recommend that one is used either.

    They can and do work but they are a bit of a gamble.

  • David Rogers

    Member
    November 18, 2018 at 3:55 am

    I use the head wash kit as required when a few missing nozzles just won’t go away.

    Our older, yet trusty JV3 can now be stripped, cleaned and reassembled in half an hour…another 10-15 minutes to pull/prime the ink through the heads…and away you go.

    Beauty of these old Mimaki machines is the entire head assembly comes off as a unit so it goes back in perfect alignment.

    As ever, take care not to crack the manifold spigots when putting the kits damper on and off.

    And absolutely make sure than the cleaning solution is pushed through the damper’s filter in one direction only…no drawing it up and pushing back through!!! Any contamination of ink or fluid will result in blocked nozzles.

    More often than not, a few flushes, or about 10cc per bank is what I use…getting a nice droplet pattern / spray then moving on.

    Can be done in situ for other printers, just make sure not to get fluid everywhere.


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  • Daniel Evans

    Member
    November 18, 2018 at 8:29 am

    Thank you. I’ll keep this in mind for the future but at the moment I don’t think I want to risk it.

    I’ve put some cleaning fluid in the capping station yesterday and I’ll go back in today to see if that cleared up.

  • Stafford Cox Stafford Cox

    Member
    November 18, 2018 at 10:26 am

    Dan, do NOT get one of those flushing kits for your machine. Your VS has a DX7 head, not a DX4 as pictured. You won’t get that damper inside your printhead. Best thing for you to do on your printer is a choke clean (CL clean I think it’s called from memory). If that doesn’t fix it you’ll probably need a damper replacing next. Let me know if you want me to come and do that as I think you have a maintenance contract with us don’t you?

  • Daniel Evans

    Member
    November 18, 2018 at 8:43 pm

    Thanks Stafford. How do I do a choke clean? Can’t see that on my menu anywhere and I checked twice.

  • Stafford Cox Stafford Cox

    Member
    November 18, 2018 at 10:43 pm

    Remind me. Is your VS or VSi? VS has a manual choke valve and VSi has automatic.

  • Daniel Evans

    Member
    November 18, 2018 at 11:06 pm

    Vsi

  • Stafford Cox Stafford Cox

    Member
    November 19, 2018 at 10:11 am
    quote Daniel Evans:

    Vsi

    Go to Sub Menu, Ink Control and Light Choke CL.

  • Daniel Evans

    Member
    November 19, 2018 at 1:52 pm

    Thanks Stafford, that’s done nothing, still have those 5 missing nozzles and a number of deflected nozzels on Cyan.

    The thing is, if you do a manual clean I have issues with the first magenta and Cyan with missing nozzels and then they come back after I leave it maybe half hour or do a few cleans.

    Could Cyan be down to the damper then?

  • Chris Wilson Chris Wilson

    Member
    November 19, 2018 at 7:18 pm

    Watch your not getting cleaning fluid in the capping station. I had that for a few mornings in a row. Missing nozzles and then after sorting a few things out they would come back. Eventually penny dropped.

    Doesn’t help with your missing ones.
    If it was the dampers I would of though more would go.. but am no engineer. I would also imagine it would move around.

    I would think it is a tiny blockage on those nozzles.
    Someone I know since sold a machine with missing nozzles at a knock down price. He dropped it off to the guy and after its journey they had all come back.

  • Stafford Cox Stafford Cox

    Member
    November 21, 2018 at 12:31 am
    quote Daniel Evans:

    Could Cyan be down to the damper then?

    Entirely possible. I think it needs somebody to have a look