Bryan,
The plates do not provide required stability, just flattening. I never used more than one unless I had the bed filled with sheet film in a batch process.
During the scan, the movement is slow and methodical, not jerky enough to move film on bed. The scan rate will determine speed. I used a heavily braced table so there was no wiggle or shake, which I suppose could cause an issue but it would be across the entire scan, not generate a specific line on a scan.
Even though one of the lamps broke in shipping, the unit was locked and is pretty rugged in that state. Having shipping damage, while possible, would be low on the list of suspects.
Honestly, I would do a super clean of the unit to eliminate most of the dust you've encountered. I wrapped the unit in poly film to exclude dust, but you never know. Use a air filtration system around the machine like a sharper image type. Wear gloves, use air to blow off images (carefully). I always kept the unit covered with a dust cover when it was not in use.
I would take the same to the cpu and blow it out. It should be fairly clean but since if draws in air over time it can concentrate dust.
I still think your experiencing network and/or software glitches, not scanner issues. Screen still does service calls through trained intermediaries so you still have a factory to call on unlike the other flatbed companies. I don't think its necessary. And somewhere out there is a script with pictures on how to disassemble for cleaning, Peter can you point Bryan to it.
bob
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