Digital BW, The Print

I'm also getting strange messages in my error log.  I'm running QTR 2 on 
my RedHat 9 box.  Printer is an Epson 2200 on the parallel port.  I'm 
printing from a Win2000 machine which is using the printer via 
Samba/CUPS.  I'm trying to go through the Ink Calibration procedure 
described in the documentation, and I'm encountering this in my log:

I [16/Aug/2003:13:17:08 -0400] Job 44 queued on 'QTR2200' by 'justin'.
I [16/Aug/2003:13:17:08 -0400] Started filter 
/usr/lib/cups/filter/pstops (PID 1032) for job 44.
I [16/Aug/2003:13:17:08 -0400] Started filter 
/usr/lib/cups/filter/pstoraster (PID 1033) for job 44.
I [16/Aug/2003:13:17:08 -0400] Started filter 
/usr/lib/cups/filter/quadrastertoprinter (PID 1034) for job 44.
I [16/Aug/2003:13:17:08 -0400] Started backend 
/usr/lib/cups/backend/epson (PID 1035) for job 44.
E [16/Aug/2003:13:17:35 -0400] [Job 44] Back-channel read error - 
Input/output error!

This is not a fatal error because the job still gets printed.  My wedges 
all look about half as dense as they should, i.e.  100% black looks 
 more like 50% black.  I turned up my density all the way, check out 
lpoptions:

job-sheets=none,none copies=1 number-up=1 wrap=false position=top-left 
stpDither=Adaptive stpImageType=Continuous stpInkType=PhotoCMYK7 
InputSlot=Auto MediaType=Matte Resolution=1440x1440hq2 
stpBrightness=1000 stpContrast=1000 stpCyan=1000 stpDensity=2000 
stpGamma=1000 stpMagenta=1000 stpSaturation=1000 stpYellow=1000 
PageSize=A4 ripBlend=100 ColorModel=QTCAL ripCurve1=EEM_2200-calib 
ripCurve2=-

Maybe it's a workflow problem?  I'm basically just opening 
inkpattern.psd, abandoning the color profile in the document, and 
printing it from the (Same as source) Adobe Gama 2.2 space.  

This is terribly frustrating, as the wedges look quite neutral despite 
their lack of density.  Examination with a loupe (8x) shows A LOT of 
white at 100%.

The only other idea I had was I was either using the wrong curve or it 
was installed incorrectly.  Daniel suggested I try the ink calibration 
process.  Changing the hardware ink limit from 70 to 100 in the new 
calibration curve had no affect.  The calibration curve was just a copy 
of one of the included 2200 curves modified sleightly for printer name 
and the ink limit.

Any ideas?

J Michael Sullivan wrote:

>Installed QuadTOneRIP v2.0 on my Mac OS X 10.2.6
>I can print letter size images but no other sizes (even though they show up in the list)
>
>Curiously, in my Print-GIMP-Errorlog I always see the following:
>
>E [15/Aug/2003:17:06:42 -0400] Filter "iProofRIPX" cannot be found!
>E [15/Aug/2003:17:06:42 -0400] Filter "pdftops" cannot be found!
>
>What does this mean?
>Looks like I didn't install something?
>
>MJS
>
>
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