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are the power lines for robo-focus running near your data lead for the PL11002? you could try shielding either the Robo-focus power lead or the data lead for the CCD... Do these bands show up in every image? if so, would it not be fair to assume that darks would take care of them? I know that's not really a "Fix" but hey, its somewhere to start...
I would imagine that its electrical noise causing the problem, and I'd assume that shielding the PL11002's USB data lead should make a difference, but for testing purposes, try routing the leads as far apart as possible to see if proximity is causing the issue, or if its actual noise in your electrical setup..
From memory, a DC power line should not interfere with a USB data lead, as both are running DC power, you get your issues come into play when you have an AC lead running next to your USB leads.. (I got noise in my ST10XE images when I had the USB lead running over the 240v lead..)
Things to try i guess...
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