QTR-Quadtone RIP

On reading these two posts carefully, it seems one has a correct width 
and
wrong length whereas the other has correct length but wrong width.  So 
I'm
not sure if we're talking the same things or different ones.

(Just to clarify: width is across width of printer, length is as the 
roll comes out.
If you print "landscape" that rotates the image data, that swaps the 
image view
of width/length, but from the printer point of view width is still 
width of printer)

The significant chopping of .15" from the length sounds a lot like a 
margin issue.
The 4000 and QTR have a little more restriction that the Epson driver.  
  There are
only one set of margins in QTR so the more restrictive sheet margins 
are used for
roll paper as well.  This means that the bottom margin must be at least 
.56" -- which
also implies that the printable area is not centered.  (On the Mac 
you'll see page
sizes marked "Centered" which makes the top margin .56" as well.)  A 
direct
consequence, for instance, is that you can't print a centered 8x10 on 
letter paper.

As a general rule all the Epson printers require a less optimal inkjet 
weaving at the
very top and bottom of a print so I always use a generous margin of 
about 1" or more.

Minor length variations could be due to mechanical feed issues for 
different papers.

------

I don't know of any obvious explanations for variations in the width.
But .5mm is pretty small so there may be some rounding/truncation 
errors as
PPIs are converted to DPIs on the print -- a number of + or - 1's can 
add up.
Is the error always consistent?  With different image sizes or image 
PPIs?

Roy


On Friday, March 30, 2007, at 12:38  AM, graham_holder wrote:

> Hi, I already started a topic on this subject but have had no response
> this is my thread from 3rd March. I am glad I am not the only one!
>
> I use an Epson 4000, Mac OSX 10.4.8
> I am trying to print standard photo sizes using QTR, roll feed, cutter
> on. Print is centred on oversize paper. The dimensions across the roll
> are fine ie 8" for a 10x8" printed portrait but the other dimension is
> only 9.85". The other .15" has cropped off the lead edge of the print.
> The next print down is OK so why doesn't the lead edge print? I
> normally print from PS2 and don't have this issue.
> I tried moving the prints down from the leading
> edge and then discovered that the printer doesn't print the full
> length of the document. An 11" drop only yields 10.5". The only
> solution is to add 1/2" to the top of the page and 1" to the bottom.
> This doesn't happen when using the Epson drivers but QTR produces such
> better monochrome prints that I want to persevere. Has anyone any
> suggestions as I hate wasting paper!
> Graham
> Regards
> --- In QuadtoneRIP@yahoogroups.com, "lensworkpub" <editor@...> wrote:
>>
>> Has anyone had any observation about a very small change in linear
>> scale with QTR?
>>
>> My workflow is to do a layout in InDesign, export to PDF, open the PDF
>> in Photoshop, save to TIF and print. Windows XP. Lastest QTR 
>> (2.5.1.0).
>>
>> Here's the problem. I've made an exact size layout (10.5x8" landscape
>> orientation) with crop marks in InDesign. The exported PDF file
>> measures exactly 10.5x8" to the crop marks. Importing the PDF back
>> into Photoshop, the crop marks still measure exactly 10.5x8". When I
>> print using QTR (2.5.1.0) at 100% (to my Epson 4000) the crop marks
>> measure exactly 8" in the paper path direction, but are 0.5mm too wide
>> in the print head direction. Any ideas why there is a gain of  half a
>> millimeter in width? This is causing me fits trimming the prints to
>> fit my die-cut folio covers to perfect centers. I'm open to 
>> suggestions.
>> Brooks
>>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com