On Feb 28, 2009, at 9:05 AM, Ricardo de Azambuja wrote:

> I am trying to find some info on how to build a inkjet head, but I got
> nothing :(
>
> My idea is make a low res (50dpi?) to print direct on the walls. I
> had seen one made of spray cans, but its just too big.

I don't think that the technology used in modern inkjets  
(piezoelectric, thermal "bubblejet") scales "up" to larger sizes; the  
physics would seem to be pretty dependent on moving very small bits of  
ink around.  (the HP thinkjet, 1984, was the first consumer (thermal)  
inkjet printer, and had a resolution of 150x150dpi.)  You may want to  
look at the older "continuous ink jet" technology (used for marking  
commercial products), but it sounds big, messy, monochrome, and  
complicated.

BillW

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