Xerox 1000 Press problems: strong banding, color consistency, registration, toner fix

Good evening,
We have installed a Xerox 1000 Press in July 2013, and started with awesome print results.. till september. Our problems started with 1mm +/- registration problems, then with unpredictable artefacts on pages (something like strong JPG compression artefacts visible on all solids), toner fixation problems on heavy stock (300 & 350g, white spots with missing toner particles everywhere). Tech staff adviced to set manually the fuser temp to maximum +10, but after another weeks it was not enough to print on 300g stock with setting of 350g and fuser temp max... While after the installation we printed superb results with default fuser temperatures.. Tech staff first said that we have bad paper, but another X1000 at neighbor printer service printed to our stock with perfect result. In meantime the quality of our prints are worse and worse, with strong visible repeated banding, bad toner fixation at the edge of sheet, bad registration between two printed color strips (like when we must to use trapping, white band between two colors, but in this case enabling trapping not helps). Tech staff serviced the machine for 2 weeks, replaced drums, fuser belt, registration motors... The result is much better overall print quality, but the strong banding and coloration effect is still visible, toner fixation at the edge still problematic. Xerox yet sent us a statement, that these effects are normal and this is not offset quality machine... Please look at our photos (disorted, taken with phone camera, but problems are visible). Welcome any advice. Thanks.

 

Have the developer units been checked?

 

yes, technician told us, that the black developer unit has been replaced.

 

Did you ever find a solution?

 

Had to put my 2 cents in. If the saturation of black or any of the 4 colors is not 100%, sometimes it's just the bias transfer that needs adjusting. In the system tools, there's a bias transfer adjustment per paper stock. It works quite well.

We've also found that bias transfer adjustments may never get it as solid as wanted. This is because the paper's not accepting such saturation. Try a different paper. Xerox would say, use Xerox paper (well, not anymore because they don't have "xerox" paper anymore)

350g paper is quite heavy. we tried some Productolith type heavy stuff and saw color differences and banding as well. Not really an easy run for some reason. After using the 1000 for 5 years now, I would avoid that heavy of stock (Xerox may say it supports it, but it'll probably stocks that they only list on their RML, which are either pricey or unavailable in the region.)

We found the best paper on the 1000 is Sappi Flo Coated Premium. As well as Xerox Silk stocks (if you can find any)

btw, this is my first post and this problem the OP was having was bugging me.

let us know if that helps =)

 

this is the probelm of fusing temperature. you may run 11 sheet run to test the 350gsm stock or lower the fuser temperature 10% and check the result. it will helpful.

 

Ever find a solution for the fusing issues?