RZ220 UI leaving roller marks on back of prints

[dearjessica]

Hello from Oslo, Norway!

I am writing because I just purchased a used RZ220 machine and am having problems with streaks / marks on the back of prints.

It is working okay when I print very light masters or text only, but as soon as I print anything dense (i.e. full bleed images) all the prints come out with streaks on the back.

The streaks look like they are from (what I think is) the pressure roller. And sure enough, I opened up the machine the skinny black roller below where the drum is seems to have these bars of ink that seem to match the streaks. I tried using mineral spirits a few times to get some of it off but it doesn't really affect the print quality. The ink seems to be endless.. is this normal?

Best,
Jessica

[ddude]

Re: RZ220 UI leaving roller marks on back of prints

What size prints are you running, and what size original? Do you have access to a different drum to try?

[dearjessica]

Re: RZ220 UI leaving roller marks on back of prints

I've just been running A4 prints but the drum size is legal.

I think to add to my confusion (I'm learning as I go) the drum screen is very new so it took a bunch of pages for it to fully ink up. Also on the drum the masters seem to be max. A4.

I don't have another drum to test but I do have extra larger (legal/A3) masters. Should I try installing these instead of the ones currently there?

What size prints are you running, and what size original? Do you have access to a different drum to try?

[20gaugeO/U]

Re: RZ220 UI leaving roller marks on back of prints

On the trail edge of the master on the drum is there a white edge of master material, it would only be 5-6mm long? Trail edge being the end not caught under the magnetic clamp plate holding the lead edge.