Homebrew PCBs

Stefan Trethan wrote:

>On Tue, 11 Apr 2006 20:56:25 +0200, Steve <alienrelics@...> wrote:
>
>  
>
>>
>>No, they use a tiny resistive element.
>>
>>
>>Steve Greenfield
>>    
>>
>
>
>'k , that was something i suspected "back then" god knows why.
>You are positive on that?
>
>ST
>
>  
>
  Epson, HP, and Cannon are all different tech slightly, I think you're 
thinking Cannon Bubblejet not HP type.  Been a long time since I've 
refreshed on the Cannon tech but it's something more like what you 
described.  HP is just a resistor heater to vaporize and push out some 
ink, Epson is piezo-mechanical..  Cannon was first with a reliable one 
long before the others, but HP and Epson pretty much superceded them 
after getting it right.  HP's heads are reasonably cheap and easy to 
produce, that's how they're throw away on the cart.  Piezo-mechanical 
are much more expensive and why Epson's are on the printer.  Only reason 
their printers are even cheap is they make the money on the inks..  Even 
Epson high end inks aren't so terrible though if you buy the 500ml for 
the large plotters, just an $800 outlay for all colors and a hassle to 
split it up.  Their yellows are superior, there's a website on doing 
this and the difference is very notable, just not worth it for most 
people.  Their seperate cart price for 500 ml ends up being $2K or so, 
not bad for colored water.. :)

Alan