piclist 2001\11\07\200905a >
Thread: A printing conundrum
face BY : David VanHorn email (remove spam text)

At 08:53 AM 11/8/01 +0800, Kathy Quinlan wrote:
>Hi David,
>RadioSpares are at http://www.RS-Components.com. If you are in the USA you will
>need to use UK export IIRC, set up an account (does not cost anything) and
>they will quote you, and you get access to the online technical library.
>What brand and make is the print head ?

Seiko LTP mech, though that's in question at this point.
Still, they all are pretty much the same in operation.
The axiohm mech that I worked with before had multiple enables too, but it
could take a full burn on all elements (19A@32V for about 300uS every
1200uS or less)

>The electro thermal uses a silver paper, which is at ground potential, and
>just puts a voltage on the print head pin, the short circuit current burns
>the paper thus creating the image, Axiom corp. made lots of these printers.

Oh THAT one!

> From what I remember, this method did not have problems with varying print
>density ie all black or no print, as the print head did not warm all that

Wasn't that the silver paper?
IIRC the electrodes burned up after a while.
Dave's Engineering Page: http://www.dvanhorn.org

Got a need to read Bar codes?  http://www.barcodechip.com
Bi-directional read of UPC-A, UPC-E, EAN-8, EAN-13, JAN, and Bookland, with
two or five digit supplemental codes, in an 8 pin chip, with NO external parts.

http://www.piclist.com hint: To leave the PICList


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