Re: Presstek 34DI problems
I wanted to know some more about your issues you are having. I have some exposure to the Ryobi DI's, I would like to understand your issues better. I just have some concerns for my contacts that are using this machine.
Your room temperature is 70 F and the chiller is set to 19 F?
1) I am having trouble understanding how you can rule out temperature and contamination in the toning. You say it is after 8 hours? The press frame and componets are warm. The delivery side of the press will be even warmer if you have an IR. There are limits to the chiller in this press.
- If yellow is in unit 4, did you try black in unit 4 and yellow in unit 1? Is the toning in unit 1 or 4?
- Do you have an IR dryer?
- Is the ink for waterless printing? Are you using an addative?
- Does the toning/picture framing happen upon startup?
+ I know that there are issues with blotchy images, with after-market blankets. Once Ryobi blankets were put on the issues were gone. It had to do with the grind and release properties of the blankets.
+ Did you try NOT using the blanket washers at all? Mount new blankets after cleaning the cylinders with IPA. Wash the blankets by hand, job to job. Remove the solution from the press and remove the blanket washer rollers. If there is too much solution it goes everywhere. When it contacts the plate, it can start to break down the silicone.
6) I have heard through the grape vine of similar issues. What type of power do you have Delta or Wye? Delta is dirty power. If it is Delta the wind will affect the power. Delta can spike and drop off. If there is a big draw of power from your area it can affect you. You can have your power company come out and put a monitor on you incomming lines and then give you a print out. Keep track of when other machines in your shop start, this is when the most amperage is pulled through the lines. When you get the chart from the power company you can see if there are spikes and compare it to your notes if a machine was starting up. There are also settings on the UPS to change the tolerance for fluctuation. I have found out that there is a bulletin on the UPS settings for power settings, through Presstek, Kodak or Ryobi. I do not know which one has it. If there is a big flucutaion get a line conditioner. If the battery is going out that is a computer issue call the computer manufacture. Or talk to a computer guy not a press technician. (If you try to monitor with a handheld multi-meter, it does not take readings fast enough.)
7) Is there clarification. Is it only at the lead egde and then fades away? Or throughout the whole sheet? Does it stay the same shade from gripper edge to tail? Does it look like a shock line from a roller? A shock line from cylinder engagement? Or a gear mark?
I hope we can help each other out.