[reportlab-users] Printing problems

[Andy Robinson]

The other useful tip I can offer is to have a "calibration page" which would explain this and have "rulers" to get it right in one go.   

We are flat out in the reportlab office this month, but if anyone  want to have a go I would happily check it in to our library. Ideally you would be able to run a script for blank page, or use a function to overdraw a page of your one.   If no one gets there first then Oualid should be able to do this around end September. 


Thanks,

Andy
-----Original Message-----
From: Tim Roberts <timr at probo.com>
Date: Fri, 16 Sep 2005 12:39:25 
To:reportlab-users at reportlab.com
Subject: RE: [reportlab-users] Printing problems

On Fri, 16 Sep 2005 09:55:54 +0100, "Andy Robinson" <andy at reportlab.com> 
wrote:

>Some of our users proved this a few years ago.  Essentially
>cheaper inkjets tend to need a 'y shift' and 'y scale' correction
>for each printer.  More expensive workgroup printers used by
>design professionals can be trusted because the manufacturers
>known accuracy is expected.  (And it explains why I always had
>trouble with Christmas card labels in my youth...).
>
>Write your app with dx and dy parameters set to 0, and scalex/scaley
>to 1.0, somewhere at the top of the script.  When you start each
>page use the canvas scale/translate operators once.  Then you
>can write something 'pure', and globally adjust it on 2-3 tries
>on a new printer.
>


For what it's worth, I also struggled with this problem when generating 
labels from a web page.  They print perfectly on my own printer, but 
were offset in Y on other printers.  I finally had to break down and add 
an "Enter top margin:" option.  I had people send me a sample printout, 
and I would tell them what value to use.  They just had to remember to 
do it the same way every time.

I suppose if I were a real man, I would have stored it in a cookie...

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.

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