Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ucsd!sdcc6!mplvax!cdl
From: cdl@mplvax.nosc.MIL (Carl Lowenstein)
Newsgroups: comp.lang.postscript
Subject: Re: PostScript scaling off?
Message-ID: <752@mplvax.nosc.MIL>
Date: 20 May 88 00:48:26 GMT
References: <313@elan.UUCP>
Reply-To: cdl@mplvax.nosc.mil.UUCP (Carl Lowenstein)
Organization: U.C. San Diego, Marine Physical Laboratory
Lines: 15

In article <313@elan.UUCP> jlo@elan.UUCP (Jeff Lo) writes:
. . . postscript code deleted . . .
>From this I would expect to get a 5 inch long horizontal line. However, it
>is actually about 1/32 inch too long. Is it too much to expect better than
>1/32 inch (~10 pixels or ~0.5%) accuracy, or is this known to be what happens
>in a LaserWriter Plus and perhaps other printers as well?

It seems that the average Canon printer engine is only nominally 300 dots
per inch.  All the ones I have seen with Imagen labels have been more
like 297 x 302.  The ones with Apple labels have been something else, I
forget what.  But only within +/- 1% or so.  One would like to believe
that this is adjustable, somewhere in the hardware.

-- 
	carl lowenstein		marine physical lab	u.c. san diego
	{ihnp4|decvax|ucbvax}	!ucsd!mplvax!cdl