Oce Arizona 480GT roll module banding issue

[ImPeter]

Hi,
When printing to roll, mostly blue colors have banding and seems to be only on the right side of the roll. Both of the blue heads are new, a month old.
Flatbed has no banding issue.
Any ideas what could be causing the banding? Thanks in advance.

 

[AlsEU]

Wrong calibration. To be checked by the technician...

 

[ImPeter]

Wrong calibration. To be checked by the technician...

Thanks, going to report it. We are new to Arizona but our technicians favourite comment has been "this printer is for printing billboards, this should be okay for looking at it from distance" so far.. :\

 

[AlsEU]

Well, RMO requires some compromises and can't be compared with the R2R printer (designed to be R2R). Viewing distance is a parameter considered during the print mode selection.

 

[ToTo]

RMO needs to be well adjusted to the machine (slant, height, distance). And check the dancer and remove the additional arm on home side that prevents from rotating.

 

[ImPeter]

Today the technician stopped by to fix something and showed him the print results from RMO. The higher the print quality the worse the output. The banding in the black printout is "quality" mode and the blue is "HD". He said he doesnt think he could fix this as it shouldn't be a hardware issue, he is escalating it to his colleagues.
What do you think? As mentioned earlier, flatbed is fine, this is happening while printing to roll.

 

[AlsEU]

According to the Oce's Technical Service Manual HD prints have no ship print or quality viewing specification. It's best suited for images with a lot of text or fine lines. The optimal resolution requires uni-directional printing. I suppose that the HD print was made bi-directionally.
The quality print - how the black head nozzle test looks like? Was this print made with pure K ink or composed with all colours using the ICC profile? If you print solid areas with pure CMYK inks, do all other solids look good or have the same banding issue? Did you check the calibration of the heads?