![]() ![]() To accomplish this, the simplest mechanism we could think of to start with was a piece of 1/4″ 20tpi threaded rod and matching nuts. The drill assembly had to support moving from left to right (the length of the pen) and raising and lowering the drill. Because it’s the same mandrel that is used to turn a pen, the bushings and finished pens would fit securely for engraving. A standard pen mandrel will be used for holding the pen. The first challenge was designing the carriage assembly that would be used. I had obtained a couple of motor shields (and steppers and a servo) for work I had going with a couple toy robots, and displays that I had been using (albeit on Raspberry PI’s for bit coin miners), but since we had the parts on hand, they would be the starting point. Since we both had some experience with using Arduino processors we decided that would be the starting point. A computer controlled engraver that would etch patterns into the sides of completed pens – pens we originally turned on a lathe. “… what could possibly go wrong? I’m in!”Īnd so we embarked on this project. Soldering and the chance to play with mixed material engineering - check “What if” he said to me one day, “we put together a box with a power drill, but instead of running it with sets of gears (mechanical turing machine) we used a micro controller to create an electrical turing machine?”Ĭomputer programming (we have to write the controller code) - check He had seen a device from Beall called the Pen Wizard. Lee is the store manager at the Leesburg Woodcraft where I work on weekends and teach classes. The initial Sketchup drawing of the pen decoratorĪbout 6 months back Lee Hanson saw something online, and thought we might be able to build/improve on it. ![]()
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