Pressure loss on black, air leak in tubing connector?

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itfben
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Pressure loss on black, air leak in tubing connector?

Post by itfben » Sat Mar 11, 2017 11:45 pm

Nearly there fixing my VP-540. The only thing now is a new problem being, the lack on pressure on the black now to sort, I think that's down to an air leak - possibily the blacks ink line splitter (3way tubing connector) as I even put 2 new dampers on the black and air still keeps going back up the printer, back towards the cartridges and not staying in the head grr.

And suggestions,

I think I hear a little air hissing when stringing the black from the waste line off the cap top - after 2mls of air then the syringe does fill with ink and you can see it going back down the lines to the printhead and come through so something isn't holding pressure.
Last edited by itfben on Thu Mar 16, 2017 2:56 pm, edited 1 time in total.

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Kai Perry
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Re: Pressure loss on black, air leak in tubing connector?

Post by Kai Perry » Wed Mar 15, 2017 6:15 pm

I would begin with replacing the captops and then adjust the capping position. then I would look at the other end with the cartridge IC, in case this is causing a backward flow.

If you look at the inklines are there any noticeable drops of ink?
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Thu Mar 16, 2017 9:40 am

How is it possible for a cap top to let air into a head?

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Re: Pressure loss on black, air leak in tubing connector?

Post by Kai Perry » Thu Mar 16, 2017 10:06 am

It won't but you stated that the ink flowed back through the head and that you hadn't replaced the captop, so a loss of suction may be occuring.
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Thu Mar 16, 2017 2:57 pm

Appoligise I meant air keeps getting back in the tubs

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Re: Pressure loss on black, air leak in tubing connector?

Post by Kai Perry » Thu Mar 16, 2017 3:46 pm

Ok, then I would look at the cartridge end to see if the ink line is damaged or the cartridge bay is causing the issue.
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Sat Mar 18, 2017 2:31 am

Unlikely to be anything at the head end?

Anything in particular I should be looking for at the cartridge end?

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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Sat Mar 18, 2017 2:37 am

If the rubber bridge between head andmsnifomd was not correct it would leak air rather than consume air correct? I'm sure it is fine. It looked it when I installed new manifold.

I'm just asking to rule ideas out.

Sure I have to be that bridge, the manifold, dampers, O-rings from ink tub to dampers, the ink tubes themself ir the Y shape ink tube splitter? Or connection fromcartridge to tubes?

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