What Your Old Graphing Calculator Says About Technology

On Thu, Aug 25, 2011 at 5:10 PM, Dave McGuire <mcguire at neurotica.com> wrote: I have several Alps plotters (Commodore 1520, the Atari-wrapped version, and some spare mechs I got from Electronic Goldmine c. 2003). I also have a RepRap and know what it can do. It can't do this. It _can_ do gears, but 2mm is the smallest reproducible feature size (as designed) using a 0.25-0.5mm-dia extruded filament. I'd link directly to a 2003-era thread on this, but it seems the archives aren't present on classiccmp.org right now. Here's a cached version... http://webcache.googleusercontent.com/search?q=cache:7uHbphsJdCwJ:www.class… "about 1/8" in diameter and 5/32" long with a bore of 1/20" ... so the entire gear is 3mm across. Too small to print on a RepRap or Makerbot (same technology, same resolution). I still have some broken plotters. I'm still interested in landing a handful of gears. I only hope my pens are any good. -ethan