...combined with "Re: [PIC] Making a HP print-head connector"


What if a PCB copper layer to be covered with epoxide "resin" and then
a picture to be printed with polyamine "hardener" ink? Anyone heard of
a print-head technology to handle polyamine ink?
Thanks.



Oli Glaser wrote:
> With the subject of home or in-house produced PBCs coming up the other
> day, I thought I would post these pictures I found of a little board I
> did a while back, just in case anyone is interested (or maybe thinks
> this kind of stuff is impossible)
> The footprint is a 0.4mm pitch, 64 pin, QFN (tracks are down to 0.2mm IIR=
C)
> Sorry the quality is so bad but hopefully one can get the general idea
> (it was taken with a phone camera through a loupe as my decent camera
> charger was broken at the time.. :-) =A0)
> Unfortunately I have no pics of the board after it was populated (it
> worked okay though), and I can't locate the board (if I do I will post a
> pic)

Philip Pemberton wrote:
> On 20/12/10 20:25, A S wrote:
>> Somewhat off-topic, sorry, how are Epson, Canon etc print-heads
>> compared to HP print-heads? Is HP to be avoided? Any advices, please.
>
> In terms of technology? HP heads tend to be more expensive, but include
> the head with the ink tank -- if the head blocks irreparably, you swap
> the cartridge and you've got a new head thrown in. Nice easy solution.
>
> Epsons are absolute pigs -- they'll block at the drop of a hat, and you
> can forget unblocking them. Generally, the head blocks because it's not
> used often enough (they don't like sitting idle for more than a week or
> so), and as soon as the printer tries to fire the head, the piezo
> element slams into the ink blob and either gets stuck fast (blocking the
> ink inlet channel), or breaks outright. If that happens, give up: the
> head is non-replaceable. New printer time.
>
> The bonus is that Epson printers contain quite a few usable parts -- the
> peristaltic vacuum pump (used for head cleaning) can usually be
> separated easily from the carriage assembly, the stepper motor is
> usually good, and the rubber rollers and gears can be handy for other
> stuff. The metal and plastic chaff, not so much. ICs on the PCBs are
> almost always Epson house-numbered.
>
> Current Canon printers are pretty good on most counts: they're fine if
> left for a few months (though the head re-prime will drink a good
> quantity of ink), and the heads are replaceable. The low-end printers
> have disposable heads mounted on the cartridges (like HP's design), but
> the mid-range and high-end machines use semi-fixed heads. What I mean by
> "semi-fixed" is that it's considered a major component of the printer,
> but it can be replaced easily (usually a small latch on the side of the
> carriage). Canon sell them as spares, and have done since the early days
> of the Canon "BubbleJet" (BJ and BJC series) printers.
>
> As a general rule --- most of the Pixma series uses the semi-fixed head
> design, while most of the MFCs use the disposable heads.

--=20
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