# Bld3r

Automatically clearing the bed and starting the next print (Videos+Instructions) - Fully automated production! So when visiting the huge CNC shop where they build my hotends I saw an awesome auto-feed lathe that you load up with bar stock, it turns a workpiece, parts it off whereupon it falls into a little chute, and it then pops out the back of the lathe into a little basket for collection. The guy running the machine shop says he just fills the machine, presses "go" and goes home for the night! Well, I had massive engineering jealously right there. If he could do it, then why not me on my little RepRap?! Another motivation was that as well as running E3D with David I am also a full time teacher of Engineering at a high school. I want to teach the kids about gearing and so on, so I want to print literally hundreds of these gears: [www.thingiverse.com] But unloading and resetting prints is a real chore. In simple summary here is how I did it: Use PLA on hot glass - the parts come completely loose from the bed once it cools. Here are some video detailing the process: (Warning - I talk a lot...)

MeshLab Slic3r - G-code generator for 3D printers Repetier Software | The software driving your 3d printer STL Volume Weight Calculator In two lines: Vital stats for 3D printing objects. Quickly estimate the cost of printing your 3D object! What is STL ? .STL is a file format that is popularly used for representing 3D object information for 3D printing applications. So what ? It is useful to know the volume and hence the weight of the material that may go into making an object on a 3D printer before one prints it. What math ? This software uses a tetrahedron volume counting algorithm to determine the volume contributed by each of the tiny triangles that constitute the 3D model represented in a STL file. class STLStats is cool because… The volume counting math is wrapped inside an easy to use PHP class that exposes getter functions (i.e. getVolume, getWeight, etc) to calculate common statistics of a 3D object. The PHP code has been commented extensively. Happy coding Updates:v1.2 Minor re-factoring.