I am fighting a maddening issue with my RP3700: excessive master skew.
Masters go on perfectly straight, measuring 26mm from the edge of the near side of the master to the metal frame on both the lead and tail ends. But, no matter what, the trailing edge quickly drifts. it will be at 25mm by about 20 prints, and at 23mm by around 100. If 3mm drift isn't bad enough, it just gets worse from there. It is happening to all of my drums and no matter what I do, I can't seem to stop it.
Here is what I have tried so far:
Ive also tried taping the master on the clamp, trailing edge, and far side to prevent it from drifting, but that only really seems to slow it down and I start to get wrinkles in my image where the master is pulling against the unmovable tape.
The clamp-side doesn't seem to move, staying at 26mm,.
I tried to be as thorough as possible before writing in, but now I'm at a loss. Does anyone have any Hail Marys for me?!
Thanks in advance!
Masters go on perfectly straight, measuring 26mm from the edge of the near side of the master to the metal frame on both the lead and tail ends. But, no matter what, the trailing edge quickly drifts. it will be at 25mm by about 20 prints, and at 23mm by around 100. If 3mm drift isn't bad enough, it just gets worse from there. It is happening to all of my drums and no matter what I do, I can't seem to stop it.
Here is what I have tried so far:
- flipping the pressure roller
- scraping the excess dried ink from the pressure roller
- replacing the pressure roller (though with another used one from my parts machine)
- increasing the amount of master material under the clamp.
- decreasing the pressure using the print-pressure adjustment in TM
- increasing the pressure using the print-pressure adjustment in TM
- adjusting the parallelism of the pressure roller
- changing the internal squeegee pressure on a drum (though its an issue with all of my drums)
- readjusting the whole print-pressure assembly (removing the rear gears, cams, etc. similar to retiming)
Ive also tried taping the master on the clamp, trailing edge, and far side to prevent it from drifting, but that only really seems to slow it down and I start to get wrinkles in my image where the master is pulling against the unmovable tape.
The clamp-side doesn't seem to move, staying at 26mm,.
I tried to be as thorough as possible before writing in, but now I'm at a loss. Does anyone have any Hail Marys for me?!
Thanks in advance!
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