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  • Committer: James Vasile
  • Date: 2009-12-17 15:09:42 UTC
  • Revision ID: james@hackervisions.org-20091217150942-8o40tyhq2p0w63sh
first draft of plexi brackets

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cad/plexi_bracket.scad
 
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/* Plexi bracket
 
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James Vasile, (c) 2009
 
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Part of the Book Liberator project, http://bookliberator.com
 
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This file is licensed under GPLv3 or later, Creative Commons
 
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Attribution/Share-Alike License 3.0 and the GFDL.
 
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*/
 
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/* This file contains the corner brackets we can use to attach 1/8"
 
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plexi (or glass) to the cube.  We would need 6 of the them.*/
 
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// units are inches
 
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plexi_thick = 1/8;
 
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cube_edge = 0.75;
 
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bracket_width = cube_edge + 2*plexi_thick; // It's a cube, so width=height=length
 
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screw_diam = 1/4;
 
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screw_head_diam = 1/4;
 
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smidge=0.01; // used to make difference shapes overhang
 
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module plexi_bracket() {
 
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  union() {
 
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    difference() {
 
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      union(){
 
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        // wall with screw hole for affixing to cube
 
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        cube([bracket_width, bracket_width, plexi_thick]);
 
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       //plexi-retaining walls
 
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       translate([cube_edge+plexi_thick,0,0])
 
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         cube([plexi_thick, bracket_width, bracket_width]);
 
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       translate([0,cube_edge+plexi_thick,0])
 
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         cube([bracket_width, plexi_thick, bracket_width]);
 
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      }
 
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      //offset screw holes
 
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      translate([cube_edge/2 - screw_diam/2, cube_edge/2,-smidge])
 
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        cylinder(h=plexi_thick+2*smidge, r2=screw_diam / 2, r1=screw_head_diam / 2);
 
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      translate([screw_diam/2,bracket_width, 0])
 
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        rotate([90,0,0])
 
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          translate([cube_edge/2, cube_edge/2,-smidge])
 
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            cylinder(h=plexi_thick+2*smidge, r2=screw_diam / 2, r1=screw_head_diam / 2);
 
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    }
 
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  }
 
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}
 
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plexi_bracket();