Design and print 3D objects

First presented at the 6 January 2014 technical meeting of Swansea Hackspace: "In this workshop you will learn how to create a 3D model using OpenSCAD, that can then be printed on a 3D printer. OpenSCAD is an open-source CAD (Computer-Aided Design) application, where you specify what your design should look like using a script, which is then compiled into a 3D model. During the workshop you will design your own enclosure for a Raspberry Pi. "

Transcript

1. Designing and printing 3D objects Gerrit Niezen
6. Drawing your first object cube([10,10,10]);
7. Subtracting two objects difference(){ cylinder(h=5,r=20); translate(v=[0,0,-1]) cylinder(h=7,r=4); } $fn=128;
8. Primitive solids cube(size = [1,2,3], center = true); sphere(r = 10); cylinder(h = 10, r1 = 20, r2 = 10, center = true); polyhedron(points = [ [x, y, z], ... ], triangles = [ [p1, p2, p3..], ... ], 
 convexity = N);
9. union() { cylinder (h = 4, r=1, center = true, $fn=100); rotate ([90,0,0]) cylinder (h = 4, r=0.9, 
 center = true, $fn=100); } Transformations and CSG operators difference() intersection()
10. Designing an enclosure for the Raspberry Pi
11. Creating the base (1) use <rpi.scad> ! base_x = 95.0; base_y = 66.0; base_z = 2; base_width = 1.5; ! base(); translate([5,5,6]) %board();
12. Creating the base (2) module base() { $fn=50; minkowski() { cube([base_x,base_y,base_z]); cylinder(r=2,h=1); } }
13. Building up the sides module base_block() { difference() { base(); translate([base_width,base_width,base_width]) cube([base_x-base_width,base_y- base_width,base_z]); } }
14. Removing the holes module bottom() { difference () { base_block(); translate([5,5,6]) board(); } }
15. Creating some slits module slits() { for (i = [0:16]){ translate([i*5+base_x*0.08,base_y*0.08,-0.25]) cube([2, base_x*0.6, base_width+4]); } } ! difference() { bottom(); slits(); }
16. Printing with MakerWare
18. Images used under the Creative Commons license: MakerBot Industries Replicator 2X by Creative Tools from Flickr Orange bike planter with succulents by Colleen Elizabeth Jordan on Flickr Snap-together Robohand by MakerBot on Thingiverse ! The design files used in this tutorial are available on Thingiverse: http://www.thingiverse.com/thing:201867