Digital BW, The Print

hi again, i have to re-post this request since i got no responses the 
first time around and am in desperate need of suggestions. thanks in 
advance for your insight to this problem.

Frank

--- In DigitalBlackandWhiteThePrint@y..., Frank Vena <frank@f...> 
wrote:

> i have a new problem now. it's a banding problem on my Photo 870, 
printing
> grayscale images with the black ink only. not the typical 
microbanding from
> clogged nozzles or misaligned print heads (i've had enough of those 
to
> recognize them). no, this one is one i've never seen before. it is 
wide
> banding that occurs only in the 1/4 tones and runs perpendicular to 
the
> direction the print heads print. i've posted a scanned print of a 
1/4 tone
> patch that shows this phenomenon quite clearly (after a curves 
adjustment to
> increase contrast for viewing purposes).
> 
> can anyone take a look and tell me what might be causing this? the 
jpeg is
> posted at:
> 
> http://www.frankvena.com/banding.jpg
> 
> much appreciated. and thanks again for the help with the clog that 
ate
> Vancouver!
> 
> Frank Vena