Most likely, it will be best to tile them and cut, say, twenty parts per sheet rather than one scanner per sheet.
daniel_reetz wrote:That's true. However my current plan is to set up my machine with optical limit switches so that I get a repeatable home position every time. From that, I'll be able to drill some peg holes into the bed and make future sheets register relative to the home position. It's work, but so far everything about this has been slog work. The drill press approach has no appeal at all for me except for one-off scanners; if I can't make these things en masse with the machines, knowledge and effort I have in this already, it's just not worth it. I might change my mind about that later, but right now I just want to automate everything. Part of my internal thinking about this is that I want time to work on other projects - I have only a few short hours per night and I'd like to at least have one of those hours available for non-bookscanner activities.
That said it may be a great approach for others. Also, when I was in Portland I tried CFMorrill's method (well, a modified version) with the drill press/Forstner and though it oversized the hole slightly it worked well. So the total diameter was not that critical.
I must be missing something. Won't the shoulder bolt that goes through the center keep the bearing in each arm from popping out?
I think you'll also need a spacer behind the bearing, that protrudes slightly from the backside of the arm so that it would keep the arms from pinching against each other as the bolt was tightened.
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