make projects

Make: Projects – Simple 3D models with OpenSCAD

Make: Projects – Simple 3D models with OpenSCAD

In this tutorial, I’m going to show you how to use OpenSCAD to produce a simple 3D model by extruding a part profile produced in normal drawing software. I use Adobe Illustrator CS3 because I have access to it and am familiar with its interface, but the popular freeware drawing program InkScape will read and write DXF files natively, and there’s no reason why it couldn’t serve just as well if you prefer it. There are a number of other free and low-cost programs that will export DXF files. OpenSCAD’s developer mentions QCAD, which is available from its developer RibbonSoft for 24EUR.

Continue Reading Sean Michael Ragan8
Designing in SketchUp

Designing in SketchUp

In my Principles of Technology class, we’re using Sketchup to design the parts we will make for the Mendocino Motor. Though we’ll fabricate the parts with hand and power tools, you can also use Sketchup to make the files needed to cut parts on a mill, Makerbot, Shopbot or other CNC tools.

The Mendocino Motor project appears in the Teachers’ Pet Projects section on
in MAKE, Volume 20, page 79.

Here are some techniques to design parts for the motor:

First get familiar with the Sketchup interface. This is pretty easy, the software is rather intuitive. A good place to start is by making whole shapes with the rectangle and circle tools. Draw a shape, then use the Push/Pull tool to extrude it up or down. You can make a shape on the side of another shape, then pull it out or push it in. Make some shapes. Mouse over the tool icons and you should see the name of the tool in a popup.

Continue Reading Chris Connors12
Make: Projects – Harvesting chemicals from a battery

Make: Projects – Harvesting chemicals from a battery

This tutorial shows how to take apart a spent zinc-carbon dry cell of the common household type. Besides making for an interesting object lesson in electrochemistry, taking apart a spent D-cell, for instance, allows you to salvage many materials which can be of use to amateur chemists–materials which would otherwise probably end up in a landfill. Separated from its reactive components, the leftover parts of the battery can be safely added to most municipal recycling streams.

Continue Reading Sean Michael Ragan14