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Topic: Avantra 44 wavy Line across film output (Read 995 times) previous topic - next topic

Avantra 44 wavy Line across film output

We are using an avantra 44s and just recently there is a line imaged in the film. See attached photos.  it is fairly straight by under magnification it appears to be wavy and gets erratic at the end of the film. It is not a scratch there is no mark on the emulsion of the film.  Any ideas what would be causing this?

Re: Avantra 44 wavy Line across film output

Reply #1
Is the line supposed to be there, just it gets wavy at some point? I know when we did film we had to make sure we walked softly by when it was imaging as it was vern sensitive to the vibration and lines would go wavey. It would not add lines though, it would only effect what was being imaged.

Re: Avantra 44 wavy Line across film output

Reply #2
No the line is not supposed to be there. I can run the same file multiple times and the line will move locations.  Has to be something with the laser and travel and blocking the path.

Re: Avantra 44 wavy Line across film output

Reply #3
Solved!!!!  I removed the brushes that enclose the laser, and on one of the brushes was a 2.5" long hair. This hair presumably from the brush itself, was being dragged across the film and blocking the laser beam hitting the film causing the line.  Now we have some pinholes in the film due to the opening up drum unit.  Hopefully the vacuum system will get rid of the dust eventually.  But at least there is no line on the film.

Re: Avantra 44 wavy Line across film output

Reply #4
I'm still getting over the film part. Where do you get your film? There can't be too much left out there. I know you can still buy 35mm film thanks to hipsters but I'd think print film would be scarce.

Please don't let my boss know. I'll never get a new platesetter if he knew someone is still running film.
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Re: Avantra 44 wavy Line across film output

Reply #5
I know by getting rid of film the cost saving paid for our CTP units many times over. There is a reason no one, well except one evidently, uses film anymore. :rotf:
Mac OS 10.12 Sierra | Prinergy 7.5 | Adobe Creative Cloud 2017 | Two Luscher XPose 160 CTP units

Prepress: One who does precision guess work based on unreliable data provided by those of questionable knowledge.

Re: Avantra 44 wavy Line across film output

Reply #6
The last place I worked at still uses film. They also have a CTP, but it wasn't big enough to handle plates for the web press so they stuck with film. They did look at newer large CTPs every year or two.

Actually, they were taken over by another company last year, so maybe they finally switched.
Prinergy 8.1.1.286 • Preps 8 (Not a fan) • SmartStream Designer

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Re: Avantra 44 wavy Line across film output

Reply #7
I know by getting rid of film the cost saving paid for our CTP units many times over. There is a reason no one, well except one evidently, uses film anymore. :rotf:
I think we saved almost $200K in film the first year of CTP back in '04.
Sweet FA right now.

Re: Avantra 44 wavy Line across film output

Reply #8
upgrading to a CTP is one of the biggest and most noticeable differences you will make in a prepress environment. Especially today with process free plates out there. When I started we outsourced our film, then eventually brought it in house, not sure of the brand. But it was a chore with all the developer and fixed. Then add masking, hunting for a spec of dust that would cause a hot spot and then again cleaning in a chemical bath. I spent many many late evenings stripping and masking for magazine type publications, 24 page, 32 page, etc etc. Now what would take me a whole day I can do in an hour or 2 with zero chemicals, no fuss, no hot spots.