Selectset 7000 portion of image missing

[tekcontrol]

At an Agfa Selectset 7000 portion of image missing. Suddenly, without any errors, part of the image, across the film output is missing, there are about 3 inches that do not appear on every large print, it doe not matter which film width is using, every image that uses about the whole drum length is cut. The "cutted" film measures the same as usual. Any ideas?

 

[STSTech]

Could be 1 of several things, laser /laser power supply, BOL issue, AOM, or something blocking beam.
Run an exposure test, if your missing the top 3 inches, this isolate the problem to the Image Setter.
Check the spot size changer for proper operation. You should be able to go into the PUP menu
and turn beam on and off and see where the beam is on drum.

STSTech

 

[VladCanada]

But the best easy method - to send total black maximum format (whole drum) job and watch the imaging process with open door and sleeves removed off the carriage.
So, you will be able to see a solid Laser beam line on the drum during whole imaging as well as to control the AOM job, just place a piece of white paper at the laser beam path in front of prism or a spot changer.
You will separate AOM problem or laser beam blockage.

 

[adarfeen]

Dear guys,

Pls. Suggest, Is it good to put the spinner sleep settings on Avantras.? Pls. Advice.

 

[VladCanada]

Dear guys,

Pls. Suggest, Is it good to put the spinner sleep settings on Avantras.? Pls. Advice.

It is recommended by AGFA to extend a 30K spinner lifetime, but I've never heard complaints from users who did not use Spinner Idle feature. Old Avantra 20/25 can not use that because lower spinner speed.

 

[adarfeen]

Guys,

Facing Issue with Interpage Gap settings, default it is 1.5 inch, set it to 0.5 inch,
some jobs imaged OK with the 0.5 inch gap, but some separations overlaps each other (no gap or to minimum gap) Any suggestions or remedies.

 

[STSTech]

What type of AGFA machine are you using, and Rip type.

STSTech

 

[adarfeen]

Avantra 25s and Torrent Rip with HW 776.

 

[GeraldSA]

Very common problem with AVA25. The cause is film slippage in the take-up nips. Film will slip with one exposure, next exposure feeds correctly and will overlap the previous exposure. Check the tension on the outer take-up nip roller leaf springs. They do suffer from bending over a long period of time. Simply remove them and turn them "upside down" and re-anchor them. Don't try to bend them back into straight, you will break them. When re-assembling the outer nip roller assembly, make sure the release solenoids travel freely, or else you are going to get other problems. Also, clean the nips with a damp, lint free cloth. Debris build-up can also cause film slippage.

 

[tekcontrol]

I follow Vlad suggestions filming a black page and the result inspecting the laser beam is that the image is printing outside the film area, part of laser is heating the top metal parts of the drum and some part of the film is not being exposed by the laser, it is like the whole printing area was rotated about 30 degrees.

 

[VladCanada]

30 degrees or 3" can be too much to be compensated by BOL (Beginning Of Line) parameter of the machine.
Did somebody remove and reinstall the spinner in that machine?

 

[tekcontrol]

Yes, the spinner was replaced more than a year ago.

 

[VladCanada]

There are 3 reasons for Fast Scan direction image shift:
1. BOL data corrupted
2. Spin-motor moved in its bed
3. Spinner's Encoder disk moved because set-screws not tightened properly.

 

[STSTech]

Tekcontrol,

Do you know how to get into the PUP menu? If you do, go and do a BOL adjustment.

STSTech

 

[tekcontrol]

There are 3 reasons for Fast Scan direction image shift:
1. BOL data corrupted
2. Spin-motor moved in its bed
3. Spinner's Encoder disk moved because set-screws not tightened properly.

I'll check spun motor , but I don't know where and how adjust BOL data, could you give me a hand on that?