custom ruler scriber Answered
Years ago (before computers), I worked in a lab where we were called upon to make clear plastic rulers with precise increments. We had a simple machine to accomplish the job. It was an ingenious gadget that held the plastic in place and with a turn of a crank, it moved the plastic a set distance and simultaneously scribed the plastic with a metal point. The precise divisions could be set with a dial and all you had to do was turn the crank.
Has anyone ever seen one of these machines? If so - what is it called and how would you make one?