QTR-Quadtone RIP

Hi Mark,

It sounds like an alignment issue.  Like maybe one head is up or down
a whole inkjet spacing.   This might make it look aligned but in fact 
the
jets are off by one.

I'm not familiar with the actual alignment procedure but maybe that
could be revisited.   A 720dpi file with just a few horizontal lines
one pixel in height should show what's happening.  Try this with the
Epson driver with various colors on the same line, you might see if
some are off of alignment.  I've also done some test files in the past
with QTR to show this same thing.  Let me know if I can help.

Roy

On Wednesday, September 20, 2006, at 05:51  PM, mccarvill wrote:

>
> Thanks for the feedback, folks.
>
> I've done the full set of head alignments, using the printer panel (no
> change), the software driver (no change) and the printer utility (no
> change).
>
> And I've had an even blurrier print using the Epson driver, so I
> don't think it's the QTR curve.
>
> I've also adjusted the platen gap and again no change.
>
> My Epson service rep recently gave me some head cleaning liquid, which
> I've used just now to soak the capping station sponge and park the head
> overnight.
>
> Still, I suspect the head will need some direct cleaning, since my
> printer was a demo unit that was parked on the showroom floor for 3
> years with only intermittent use, so I imagine there's some dried
> ink in there. But before I clean the head I will consult with the
> service rep because I don't want to risk damaging it.
>
> I found some instructions on how to clean the head here
> <http://www.piezography.com/support/printhead_cleaning_tips.htm> - (Tip
> #6)
>
> I gather these are as good as any?
>
> Thanks again,
>
> Mark
>
>
> --- In QuadtoneRIP@yahoogroups.com, "dlruckus" <dlruckus@...> wrote:
>>
>> It's a bit hard to tell onscreen but it does appear that there is
>> spatter occurring. I would try cleaning the underside of the LK head
>> using the techniques listed in the wide format groups archives and
>> putting windex w/ ammonia d on it's cap station and leaving it set
>> awhile before a couple of cleaning cycles, to see if that helps. It
>> takes very little jet deflection to create problems like what you seem
>> to have. It could be nothing more than ink buildup under the head.
>>
>> Regards
>> Duane
>>
>>
>>
>>
>>>> -----Original Message-----
>>>> From: QuadtoneRIP@yahoogroups.com
>> [mailto:QuadtoneRIP@yahoogroups.com] On
>>>> Behalf Of mccarvill
>>>> Sent: Tuesday, September 19, 2006 11:33 AM
>>>> To: QuadtoneRIP@yahoogroups.com
>>>> Subject: [QuadtoneRIP] Blurry test print from 7600
>>>>
>>>>
>>>> I've just started testing my 7600 / UT7 / QTR combo and, as you
>> can see
>>>> here <http://www.stepwise.ca/7600%20blur%20QTR.jpg> , the lines on
> the
>>>> step wedge are blurry. By contrast, the exact same file prints
> razor
>>>> sharp with my 1280 / UT2 / QTR setup.
>>>>
>>>> I'm testing using EEM, 1440 super / high, and the 2200 warm EEM
> curve
>>>> modified for the 7600 (i.e. lowered default ink limit to 50 from
> 70).
>>>>
>>>> What I've tried: Nozzle checks are perfect and, in the nozzle
> check
>>>> printouts, the text showing ink and maintenance tank info is
>> sharp. Head
>>>> alignment already done, via the printer panel. And I've tested and
>>>> calibrated the paper thickness for EEM.
>>>>
>>>> Not sure what else to try. Any ideas?
>>>>
>>>> Thanks
>>>>
>>>>
>>>>
>>>> [Non-text portions of this message have been removed]
>>>>
>>>>
>>>>
>>>>
>>>> Yahoo! Groups Links
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>
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>
>
> [Non-text portions of this message have been removed]
>
>
>
>
> Yahoo! Groups Links
>
>
>
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>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com