Cad Exercies - Bracket

Revisiting Cad Exercises

 

source: https://goo.gl/xLKvB8

$fn=50;
main();
module main(){
    difference(){
        union(c ){
        translate([ 0, 0, 80+36])cylinder( 30+6+6,8,8);
        linear_extrude(6,convexity=20)plate1();
        linear_extrude( 80+36+6,convexity=20)difference(){
        square(60,center=true);translate([21.01,0,0])square(42,center=true);}   
        translate([ 0, 0, 36+6])rotate ([90,0,0])cylinder (60,19,19,center=true);
        translate([ 0, 0, 80+36+6])rotate ([90,0,0])cylinder (60,30,30,center=true);
        }
        translate([ 0, 0, 80+36])cylinder(  30+6+7,4,4);
        translate([ 0, 0, 36+6])
        linear_extrude( 80+ 30+7,convexity=20)translate([16,0,0])square([32,61],center=true); 
        translate([ 0, 0, 36+6])rotate ([90,0,0])cylinder (61,7,7,center=true);
        translate([ 0, -40, 36+6])rotate ([90,0,0])cylinder (60,12,12,center=true);
        translate([ 0, 45, 36+6])rotate ([90,0,0])cylinder (60,12,12,center=true);
        translate([ 0, 0, 80+36+6])rotate ([90,0,0])cylinder (61,9,9,center=true);
        translate([ 0, -20, 80+36+6])rotate ([90,0,0])cylinder (60,15,15,center=true);
        translate([ 0, -40, 80+36+6])rotate ([90,0,0])cylinder (60,20,20,center=true);
        }
}

 
module plate1()

{
center=true;
R=13;r=8;
difference(){
        union(){
            translate([ 40, 40])circle( R );
            translate([-40, 40])circle( R );
            translate([-40,-40])circle( R);
            translate([ 40,-40])circle( R );
            square(80,center);
        }
    translate([ 40, 40])circle( r );
    translate([-40, 40])circle( r );
    translate([-40,-40])circle( r );
    translate([ 40,-40])circle( r );
    
    }
}