BN-20 bad noozles after flush

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machomaaan
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BN-20 bad noozles after flush

Post by machomaaan » Thu May 16, 2019 5:08 pm

Hello.

I want to rescue the white color of my BN-20 by a complete flush over the BN-20 utility.
After that, i did a nozzle test. See attached file.

I can't believe that the black ink has now bad nozzles. Why?

If i do a test print, there is a fine ink-dust on the black.

What can I do? Did I kill my head by flushing? :(

I've replaced the capping station, felt-wiper and wiper. But this doesn't help.

Do anybody have an idea?

Thank's!

Greetings
Macho

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Kai Perry
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Re: BN-20 bad noozles after flush

Post by Kai Perry » Tue May 21, 2019 9:08 am

Do you mean a head wash?

If so this could cause the nozzles not to fire properly for a time. Usually the use of a head wash is if you are moving the machine and storing for a time.
Kai Perry
Application Engineer
Roland DG (UK) Ltd
http://www.rolanddg.co.uk

machomaaan
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Re: BN-20 bad noozles after flush

Post by machomaaan » Tue May 21, 2019 9:40 am

Thank you for you answer, Kai!

I've pumped out all the ink and use the cleaning fluid, because my white does not print and I tried to get it back to work, but after the cleaning I've got bad nozzles on black.

"The nozzles do not fire properly for a time" - do you now how long it could be?

I've already tried do print some 100% black bars to get the whole cleaning fluid out of the machine, but it seems not to help.

Should I try another cleaning? (I've already done it 2 times)

I've also tried a head soak by flush the capping station, turn off the printer and get the head back to the capping station for about 20 min.

Can I do anything else?

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Kai Perry
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Re: BN-20 bad noozles after flush

Post by Kai Perry » Tue May 21, 2019 12:19 pm

I would leave the machine to rest for 24-48 hours with the normal maintenance routines running and then have a look again.
Kai Perry
Application Engineer
Roland DG (UK) Ltd
http://www.rolanddg.co.uk

machomaaan
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Re: BN-20 bad noozles after flush

Post by machomaaan » Tue May 21, 2019 1:43 pm

I've done this already over the weekend.
But it's not better than before :/

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Kai Perry
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Re: BN-20 bad noozles after flush

Post by Kai Perry » Wed May 22, 2019 9:16 am

Ok, then it could be cap top related, maybe the seal isn't enough, try applying cleaning fluid to the seal and then capping the heads and performing a couple of cleans. If still no good then an engineer is likely needed to check the ink system.
Kai Perry
Application Engineer
Roland DG (UK) Ltd
http://www.rolanddg.co.uk

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