loopedBlock3.scad

//block shape
x=60;
y=60;
z=13;
 
// track channel
f=x+10;
g=25;
h=9.5;
// block top
e=20;
r=y+10;
t=16.5;
 
// spacing of screw holes
cx=15;
cy=40;
dx=15;
dy=45;
 
difference()
{
    translate([0,0,z]/2) cube ([x,y,z],center=true);
    translate([0,0,z+4]/2) cube([f,g,h],center=true);
    translate([49,0,z+11]/2) cube ([e,r,t],center=true);
        translate([-49,0,z+11]/2) cube ([e,r,t],center=true);
   
    for(X=[-1,1], Y=[-1,1])  // Will loop through all four possibilities of X and Y
    {
        translate([X*cx,Y*cy,0]/2) cylinder(d=5, h=50,  center=true);
        translate([X*dy,Y*dy,0]/2) cylinder(d=5, h=50,  center=true);
        translate([X*dy,Y*dx,0]/2) cylinder(d=5, h=50,  center=true);
        translate([X*cx,Y*cy,0]/2)  cylinder(d1=16, d2=8, h=7,  center=true);
    }
 
// zip tie knotches    
    translate([0,-cy/2,11.5-10]) cube([18,3,4],center=true);
    translate([0,cy/2,11.5-10]) cube([18,3,4],center=true);
// removal knotches
       translate([0,-(6.8+51)/2,11.5-10]) cube([8,3,4],center=true);
   translate([0,(6.8+51)/2,11.5-10]) cube([8,3,4],center=true);
   translate([(6.8+51)/2,0,11.5-11]) cube([3,8,2],center=true);
   translate([-(6.8+51)/2,0,11.5-11]) cube([3,8,2],center=true);
}
 
translate([0,(6.8+4)/2,z-8]) cube([18,2.7,5],center=true);
translate([0,-(6.8+4)/2,z-8]) cube([18,2.7,5],center=true);