Harbor Freight Engraving! (for delta)

thingiverse

As many of us know, Harbor Freight has those budget-friendly "Dremel" style rotary tools available in their 80-piece rotary tool kit, such as this one: http://www.harborfreight.com/80-piece-rotary-tool-kit-97626.html yet it can often be purchased for significantly less. I took the motor and "chuck" out of mine, requiring just a single screw to disassemble them completely. Once I was inside, I removed the switch and connected the power directly to the motor via soldering (you may choose to leave the switch on if you prefer having control over shutdown while it's in place). A small modification was made to my laser mount: http://www.thingiverse.com/thing:575523 so that the motor could be securely held in position. It's worth noting that standard spacing between triangle holes typically is 44mm for Kossel and Rostock designs, and fortunately in this case it matched, thus making it easy to find a suitable location. For running the end piece I still have plans, however a probable method will likely be the same approach as used for my laser, where I will simply program the path follower to run one layer thick .STLs at a time.