zakezuke said:
By gasket, do you mean that 1/2 folded piece of thin foam at the far
right of the printer, directly right of the waste ink system? That
gasket?
That's it. Its a rubber gasket with a foam pad inset. (Underneath the form
pad is a pipe that leads to a vacuum pump that operates during cleaning
cycles).
I'm trying to be fair, but from what i've observed, the head tends to
knock this out of place. It's not attached down in anyway except one
hook on the far right side.
That does happen once in a very blue moon, probably moreso on the cheaper
models. What tends to happen more often is that:
a) Ink gets dried either in or on the edge of the gasket and it allows air
to get in when the heads are parked. That causes the ink to dry in the
printheads and it blocks the nozzles.
or
b) The foam pad becomes either saturated or gets hard dried ink deposits
building up on it - causing wicking of the ink through the nozzles when
parked and drying the ink in the nozzles.
Both of those problems can be solved easily by applying a few drops of the
correct ink solvent to the pad/gasket.
Sometimes there's also a problem of air getting into the top of the
printhead through a badly sealed ink cartridge - but that's very rare and
I've only seen it happen when ink carts have been refilled dozens of times.
If this is indeed the source of a problem, it strikes me as amazing
they haven't made the choice to go with something simple like double
stick tape to keep this thing in place, or two fold over clamps that
would keep this gasket taught on either side allowing the head to rest
in the middle assuring a positive seal.
The R200's and R300's (and I assume most of the R-series) have what looks
like a thin metal X-shaped clamp over the top of the foam pad - presumably
to keep it flat and in place. They also have a printhead that moves up and
down and (from what I've seen of the way the printers park), they 'plonk'
the heads directly onto the gasket; rather than the older method of having
the gasket slide up and into place under the printhead. Time will tell if
that actually makes any difference to the reliability; but so far if my
experience and the experience of others is anything to go by, the R'series
are a lot less likely to clog than previous models.