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why is magenta bank loosing 20-50% of nozzles please?
Its almost like clock work – a year ago around this time I had a jv3-160 that was having nozzle crap out on my cyan cartridge. After alot of fiddling around and loosing a few job i traded up to a JV33 with a 1 year warranty.
It runs problem free until about 2 weeks before the warranty is up – go figure!
I’ve attached a few test prints – as you can see its not always the same bank. and its been getting worse and worse. I just did an ink fill-up, problem went away, and then I printed about 80 or so sq ft and it was back again.
What are some probably causes? Dampers? And if so – how hard are they to change on this machine?
My warranty covers parts only – so I’ll have to do the labour unless its really tricky ( I want to avoid the $150/h tech rate)
‘THanks in advance!
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8 Replies
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Note – this is just photos of the one side of my test print, the other side prints perfectly fine.
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Scot. mimaki give a 2 year warranty in the uk, so I think it just a coincidence that you get a failure just before the years warranty is over, but then if it is before surely it is covered?
I would say that under your statutory rights, mimaki or your supplier should rectify any faults due to manufacture. and that would include parts and labour
Peter
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[left]wel regretably I’m in canada and I bought my machiine state side an I’m shit out of luck on that front :-)[/left]
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Hi Scot, looks like a restricted ink flow. I’ve had similar looking dropout on my 160s. Cause is usually blocked damper filter and/or blocked headcap filter. I suggest you replace the dampers first (probably should be an annual maintenance routine anyway) to see if it solves your problem.
As a matter of interest, ink shelf life is only rated about a year after which time it can become unstable. Replacing blocked filters might only temporarily solve an ink flow problem if the ink is too old.
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Perhaps some old ink is caught up in the damper? We are reasonably medium volume, so one cartridge isn’t in our shop for more than a month ever.
I’m thinking there might be air getting in around the o-ring that connects the damper to the head perhaps? I haven’t taken this unit apart yet, but I know there was a similar setup with the jv3 I had perviously.
Anyone have the service manual for the JV33?
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Scot, old ink can’t really get caught up in the damper. From what you describe it’s probably not a problem associated with out of date ink.
While there could be an air leak from a bad o-ring seal, it’s much more likely to be a restricted damper filter. Fitting a new damper on the problem ink line should be your first step, and probably your best bet, for an instant fix.
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Great. Thanks for the info. Has anyone here done a damper swap on this machine. It looks you just slide off the little silver bracket and then unscew the ink line and it should pop right out…. Is this the case
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I would also check the alignment of the cap-seal to the head and the condition of the rubber seal around the capping station.
If the drop out occurs on the same area of the test print every time the head may not be capping properly, air getting in and the closest nozzles dropping out. Check for dried ink on the seal (you do follow the cleaning schedule don’t you ?).
With the size of the head cap alignment can be a little more critical then on older machines with the old Epson heads.
Mike
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