--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
> I'd dread to make a hole in the bottom (where gravity will not be your
> friend), also, that would make it impossible to fill inside the printer.
Yes, and I use hot glue to seal. I was doing that for a short time
when I worked for a cartridge refiller. He has anger management
issues, manages to destroy a lot of cartridges and even broke his
centrifugal cartridge spinner (used to empty cartridges). I came up
with the method myself, however it is highly likely that others came
up with it and simply haven't published it. Only for OEM carts as 3rd
party carts don't try to stop you from refilling.
> > However, MIS instructions leave out an important step: you should
> > temporarily tape over the air inlet hole before removing the fill
> > plug. Then -after- reinstalling the fill plug, -before- drawing a
> > little ink out the ink outlet to prime it, remove the tape over the
> > air inlet.
> > If you don't, ink flows up into the air inlet. This can cause problems
> > later, and you won't know why. Dried ink in the air inlet can hinder
> > air, so nozzle checks look fine and light printing is OK, but heavy
> > printing can show random banding as printing progresses. Then a nozzle
> > check or light printing immediately after can still look just fine.
>
> OK, i can see how that happens - the ink levels will equalize due to
> gravity.
> The vent hole is the same size as the fill hole, but i didn't get any
> spare stoppers with it..
> Maybe i'll make one from silicone... OTOH i might just remember the
> warning and wash it out when the problem turns up, or stick in a
syringe
> since the hole fits a luer taper.
> Thanks!
No problem. Since it's a temporary hole, I find a bit of vinyl
electrical tape works well enough. -Don't- pull it tight.
> BTW, the carts came with some strange syringes. Huge diameter and the
> plunger is hollow inside, so that there's always much air inside it
that
> can not be expelled. Any ideas how those are supposed to be especially
> useful?
I don't know what you mean, so I'd have to see pictures.
One issue with syringes: if there is no air, it is possible to cause a
remarkably high PSI, especially with small syringes. With an air
bubble, the air acts as a spring that has the effect of causing a
lower PSI. There is that internal thin plastic sheet inside Epson OEM
cartridges that I suppose could get blown with too much pressure. I
don't know if that has anything to do with it.
Steve Greenfield