[vcf-midatlantic] Greenbar printout DONE!

W. Bryan Caudle bcaudle at ctsi.net
Sun Feb 28 18:36:41 UTC 2021


Great point Dave.  If a line printer was fitted with a DB9 connector would it actually exist?  

Sent from my iPhone

> On Feb 28, 2021, at 1:32 PM, Dave McGuire via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:
> 
> On 2/28/21 1:13 PM, Andrew Diller via vcf-midatlantic wrote:
>> Just to be clear- when you say they are line printers, that means that they have pins across the entire width of the paper/platen - and can print an entire line at a time, right? There is no moving print head...
> 
>   It depends.  "Line printer" is one of those terms that became 
> successively more abused as time went on.  It used to mean "prints a 
> whole line at a time", but later that definition became somewhat distorted.
> 
>   Kinda like architects using big floor-standing HP ink-jet printers, 
> calling them "plotters", to the point where HP themselves calls them 
> "plotters".  They are not plotters; they are ink-jet printers.  But they 
> replaced pen/vector plotters, so they kept calling their output devices 
> "plotters".
> 
>   We have a big Tally/Genicom 4490XT printer at LSSM.  This 1400 LPM 
> printer prints an entire line at a time, but how it does it does 
> actually involve a moving print head.  The print head is the width of 
> the paper, but it has columns of pins in groups with spaces between 
> them.  While printing, that head moves back and forth at great speed, 
> you can barely see it move, with a total reciprocating lateral travel of 
> maybe 1/4".  It moves the groups of pins back and forth to fill in the 
> gaps between the groups.  But it's still called a "line printer".
> 
>                -Dave
> 
> -- 
> Dave McGuire, AK4HZ
> New Kensington, PA


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