Hi All,
Having run several OCE Arizona 250s, and their sister machine the FUJI Acuity flatbeds, I can say that the printheads are the biggest problem. At $5,000 each, they should be iron-clad tanks which last forever. They are not.
I have seen several heads clog up with ink that has turned into jelly. No explanation from the tech as to WHY the ink has solidified, just an expensive replacement. Have also seen a couple of heads seize up and stop working. Immediately. Right after doing a clean print. No tech-planation there, either.
That said, I have also seen a 3.5" print head with a solid inch of nozzles not firing, do a clean print. Inexplicable.
There was a problem with the print heads leaking around the edges inside the carriage. The leak would seep out the sides, and eat through the side of the print head, killing a few nozzles at a time, eventually killing the head totally. They have newer heads which have a better seal on them, so be sure your machine has the latest heads. If your dealer is honest, he will show you the upgrade when you mention this. Also, ask about the ink lines to the print heads. They have an inner layer which sometimes separates from the outer layer. Saw the after-effects of this - a hose exploded in the carriage, spraying black ink all over a $5,000 mother board.
The OCE/FUJI inks have had adhesion problems in the past. I was using one about a year ago, and they switched inks to a more latex-based formula. I tested it by printing a piece of coroplast, putting a small piece in the company freezer for a few days. Then I took it out and folded it twice. The ink stayed perfectly, no cracks, no flakes. I think they were called "K1" inks, but they might have something better now.
The bulbs are expensive and wear out often enough to be considered a consumable. There is a third party supplier which can save you money, if your machine is out of warranty.
Biggest thing is keeping it clean. Running it as much as possible, especially with white ink, will keep the nozzles pretty clear. Any dust anywhere will fall onto your prints. Clean the lamp screens often. Ask about what liquid to use to clean the heads. OCE has gone back and forth between recommending ISO alcohol and the ink flush solvent. ISO worked best for me, but ....
The roll option on the OCE/FUJI works great. Like having two printers in one, not a hybrid which does both jobs, but problematic.
Good luck!
- Doug
Vancouver