revwarguy wrote:BTW, I'm scheming up a new version of this that adapts to the Hackerspace scanner. It won't have the pressers with slotted aluminum arms and plastic vees, but will include the other servo gadgets.
You're going to raise the book into the platen by motor control? Hmmm... That probably rules out R/C servos for it. Turning a 5 start screw by a stepper might do it, like a NEMA 23, allowing precise control around the glass. Perhaps a 12V windshield wiper motor would be cheaper, and it would certainly have enough torque. Not much room to place the turning arms inside the box and still get them out of the way of the platen.
My idea is to use a 12v wiper motor and mount it outside the scanner with a link to the pull down handle. Looking at this wiper motor with integral motor control: http://www.devicecraft.com/wimoseco.html