Here's a link to my Instructable for motorizing the plunge of my USB Microscope Guided PCB Drill <http://www.instructables.com/id/Motorized-Plunge-PCB-Drill-Using-a-USB-Microscope/>. Mark
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[Homebrew_PCBs] Motorized Plunge PCB Drill
2014-11-05 by Mark Lerman