[time-nuts] Three HP oldies

[Greg Broburg]

Comments

gif is much better than jpg

It is normal to calibrate the print driver so that the
accuracy is very good. If you put a ruler up on a
printed 1 inch line and see that it is significantly
off then the driver needs to be calibrated.

Greg


On 3/12/2012 1:23 PM, Hal Murray wrote:
> semiflex at comcast.net said:
>> Or if it is all text, the postscript file system is very good, it allows
>> control of the entire page formatting in preservation of accurate
>> alignments.
> Postscript also does lines and circles and ...
>
> Usually it gets (much) better results with text than you get from gif/jpg
> when they are targeted for screen resolution.
>
>
>>   A laser printer with 600 dpi is a very good graphics machine
> Keep in mind that the scale factor may be a bit off.  If you draw a 1 inch
> line, it might be slightly more or less than an inch.
>
> It's easy to scale postscript.  My linux system has a psresize command.  (I
> haven't tried it, at least not recently.)  With a bit of trial and error, you
> can get a very accurate result.
>
> I used to print gerber layers for PCBs on mylar.  If you were doing
> mechanical checks, it was worth the effort to get the scale right.  (Maybe we
> just had a crappy printer.)
>
> If you like low level hacking, you can write raw postscript by hand for
> simple things.  I have the first 3 postscript books from many years ago.  I
> pull them out every few years.
>
>