Roland black head problem!!

[Chris Wool]

yes the black head appears to be the common one. i have replaced the black head twice in 5 years on my soljet pro11 , the others are still fine.

two possible reasons in my view.
the black head is the most venerable and probably has more pigment in the ink .

chris

[Phill Fenton]

Try using Clearasil…

It’s good for blackheads… 😕

[David Rowland]

black is the trouble one… also the first to hit material if it does

[Rodney Gold]

The heads have a service life of like 1 billion dots , there are counters for each head AFAIK, we have had to replace a head or 2 in 5 yrs , we always get a reate if the service life is not exceeded.
Black has always had a far higher dot count than any other.

[Russell Huffer]

I also belive it could be because it probably does not get used as much as the other colours unless you print a lot of text.

What I do and I think it helps is print what Troop calls a confidence strip, this is 6 lines printed down the side of the media, so it means that the head prints all 6 colours every pass.

At the moment I am printing off 20M of exhibition graphics which are prodomantly blue and gold, so with no strip being printed heads that are not being used would be exposed over the heaters for a long time as been printing for the last 4 hours.

I guess as Troop has this facility most good rips should.

Regards

Russell.

[Chris Wool]

Russell although you dont see it the roland does fire every jet just before it gets to the media, on every pass thats what that square sponge box is for, to collect the very small amount of waist,
prove it buy slipping a bit of paper over the sponge as the head passes.

chris

[Russell Huffer]

I belive you as I just put a new clear waste pipe on that last week and it has already got quite a bit of ink in it.

I think I will still print strip as it uses very little ink 2m/m X 20M today and all my nozzles are normally clear on all heads not bad for Activasol.

Regards

Russell.