belt_width = 6; //add 2 milimeters for the lip or if you want 2 sides
sides_width = 2; //Thickness of the side/s and lip
number_of_sides = 1;
liponoff = 1;

/*
if(number_of_sides == 1)
{
BeltTensioner(0);
}
if(number_of_sides == 2)
{
BeltTensioner(270);
}
*/

module poly_reuse(){
	polygon([[0,0],[0,50],[5,50],[15,30],[15,20],[5,0]]);
}

module BeltTensioner(rotation){

rotate(rotation,[0,1,0])
difference(){
	union(){
		linear_extrude(height = sides_width , center = false)
			poly_reuse();
	
		intersection(){
			linear_extrude(height = sides_width*2 + belt_width , center = false)
				poly_reuse();
	
			translate([-5,0,sides_width]){
				cylinder(r =10, h = belt_width);
				translate([0,50,0])
					cylinder(r =10, h = belt_width);
				if(number_of_sides == 1)
				if (liponoff == 1){
					translate([-1,0,belt_width]){
						cylinder(r1 =11,r2=12,h = sides_width);
						translate([0,50,0])
							cylinder(r1 =11,r2=12,h = sides_width);
					} 
				} 
				if(number_of_sides == 2){
					translate([5,0,belt_width])
					linear_extrude(height = sides_width , center = false)
						poly_reuse();
				}

			}
		}
		translate([10,20,sides_width])
			cube([5,10,belt_width + sides_width]);
	}
	
	//Bolt Hole
	translate([12,25,(belt_width/2)+ sides_width], $fn =8)
		rotate(90,[0,1,])
			cylinder(r=1.7,h=10,center = true); 

	//Nut Trap
	translate([9.9,25,(belt_width/2)+ sides_width])
		rotate(90,[0,1,0]) rotate(90,[0,0,1])
			cylinder($fn=6,r=3.2,h=3*0.7);
	}

	difference(){		
		intersection(){
			translate([25,25,-1])
				rotate(270,[1,0,0])
					cylinder(r = belt_width-0.2, h = belt_width-0.2,center =true);
			
			translate([25 - belt_width,20,0])
				cube((belt_width)*2);
		}
		translate([25,25,1])
				cylinder(r=1.7,h=2,center = true); 
	}
}$fn=32;

//belt_pitch = 3; // in mm?
belt_pitch = 5;
//belt_width = 6.2;
belt_width = 7.0; // in mm?
belt_height = 2.8;

//hole_spacing = 18; //in mm?
hole_spacing = 18;

ram_length = 1.5;

m3_diameter = 3 / cos(180 / 8) + 0.4;
m3_radius = m3_diameter / 2;

m3_nut_diameter = 5.5 / cos(180 / 6) + 0.4;
m3_nut_radius = m3_nut_diameter / 2;

m3_nut_depth = 2.5;

wall = 3;
extrusion_width = 0.4;

clamp_height = 3.5;
//belt_depth = 2;

ram_height = 7;

module clamp(h=10) {
	translate([-wall - m3_radius, 0, 0])
	difference() {
		intersection() {
			translate([0, belt_width / -2 - m3_diameter - wall - extrusion_width * 2 - ((hole_spacing-10)/2), 0]) cube([wall * 2 + m3_diameter, belt_width + m3_diameter * 2 + wall * 2 + extrusion_width * 4 + (hole_spacing-10), h]);
			union() {
				translate([wall + m3_radius, belt_width / 2 + m3_radius + extrusion_width + ((hole_spacing-10)/2), 0]) cylinder(r=wall + m3_radius, h=h + 1, $fn=32);
				translate([wall + m3_radius, -belt_width / 2 - m3_radius - extrusion_width - ((hole_spacing-10)/2), 0]) cylinder(r=wall + m3_radius, h=h + 1, $fn=32);
				translate([0, -belt_width / 2 - m3_radius - extrusion_width - ((hole_spacing-10)/2), 0]) cube([wall * 2 + m3_diameter, belt_width + m3_diameter  + extrusion_width * 2 + (hole_spacing-10), h + 1]);
			}
		}
		translate([wall + m3_radius, hole_spacing/2, -1]) cylinder(r=m3_radius, h=h + 2, $fn=16);
		translate([wall + m3_radius, -hole_spacing/2, -1]) cylinder(r=m3_radius, h=h + 2, $fn=16);
	}
}

module clamp_base() {
	difference() {
		clamp(belt_height + m3_nut_diameter + 1);

		translate([-1 - wall - m3_radius, -belt_width / 2, m3_nut_diameter + 2]) cube([wall * 4, belt_width, belt_height + 1]);
		translate([-1 - wall - m3_radius, 0, m3_nut_radius + 1]) rotate([0, 90, 0]) rotate([0, 0, 180 / 8]) cylinder(r=m3_radius, h=wall * 4, $fn=8);
		translate([-1 - wall - m3_radius, 0, m3_nut_radius + 1]) rotate([0, 90, 0]) rotate([0, 0, 180 / 6]) cylinder(r=m3_nut_radius, h=1 + m3_nut_depth, $fn=6);

		//translate([0, hole_spacing/2, belt_height + m3_nut_diameter + 1 - m3_nut_depth]) cylinder(r=m3_nut_radius, h=m3_nut_depth + 1, $fn=6);
		//translate([0, -hole_spacing/2, belt_height + m3_nut_diameter + 1 - m3_nut_depth]) cylinder(r=m3_nut_radius, h=m3_nut_depth + 1, $fn=6);

		translate([ - belt_pitch / 3.8, -belt_width / 2, -.8]) cube([belt_pitch / 1.9, belt_width, 2]);
		translate([- belt_pitch / 3.8 + belt_pitch, -belt_width / 2, -.8]) cube([belt_pitch / 1.9, belt_width, 2]);
		translate([- belt_pitch / 3.8 - belt_pitch, -belt_width / 2, -.8]) cube([belt_pitch / 1.9, belt_width, 2]);

	}
}

module ram() {
	difference() {
		union() {
			cylinder(r=m3_nut_radius, h=ram_height, $fn=32);
			translate([0, -m3_nut_radius, 0]) cube([ram_length + 0.1, m3_nut_diameter, ram_height]);
		}
		translate([ram_length, -m3_nut_radius - 1, -1]) cube([m3_nut_diameter + 2, m3_nut_diameter + 2, ram_height + 2]);
		translate([-0.5, 0, ram_height / 2]) rotate([0, 90, 0]) rotate([0, 0, 180 / 8]) cylinder(r=m3_radius, h=2 + ram_length, $fn=8);
	}
}

module polyhole(r,h)
{
  cylinder(r=r/2,h=h);
}

module nut_s(d,h)
{
  translate([0,0,h/2])
  {
    cube([d,d/sqrt(3.0),h],center=true);
    rotate([0,0,120]) cube([d,d/sqrt(3.0),h],center=true);
    rotate([0,0,-120]) cube([d,d/sqrt(3.0),h],center=true);
  }
}


module beltclamp(){

m3_diameter=3;

clamp_height = 3;
clamp_width = 10;
clamp_length = 18;		// distance between the center of the 2 holes
//belt_pitch = 2;
//belt_pitch = 5;
//belt_width = 10;
//tooth_width = 1.3;
tooth_width = 2.5;
tooth_heigth = 1.75;
tooth_heigth = ram_length;
//offset = belt_pitch/4;
offset = 0;
// uncomment next line for a symetric clamp
//offset = 0;

	difference(){
		// basic shape
		union(0){
			translate(v = [0,0,clamp_height/2]) cube([clamp_length,clamp_width,clamp_height], center=true);
			translate(v = [-clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			translate(v = [clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			}
		// screw holes
		translate(v = [-clamp_length/2, 0, -1])polyhole(m3_diameter, clamp_height+2);
		translate(v = [clamp_length/2, 0, -1]) polyhole(m3_diameter, clamp_height+2);

		// nut holes
		translate(v = [-clamp_length/2, 0, -2])nut_s(5.5,3);
		translate(v = [clamp_length/2, 0, -2]) nut_s(5.5,3);

		// belt grip
		translate(v = [0,offset,clamp_height-tooth_heigth])
		for ( i = [round(-clamp_width/belt_pitch/2) : round(clamp_width/belt_pitch/2)]){
			translate(v = [0,belt_pitch*i,tooth_heigth])cube(size = [belt_width, tooth_width, tooth_heigth*2], center = true);
		}
	}

}

module beltclamp3(){

m3_diameter=3;

clamp_height = 3;
clamp_width = 10;
clamp_length = 18;		// distance between the center of the 2 holes
tooth_width = 2.5;
tooth_heigth = 1.75;
tooth_heigth = ram_length;
offset = 0;

	difference(){
		// basic shape
		union(0){
			translate(v = [0,0,clamp_height/2]) cube([clamp_length,clamp_width,clamp_height], center=true);
			translate(v = [-clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			translate(v = [clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			}
		// screw holes
		translate(v = [-clamp_length/2, 0, -1])polyhole(m3_diameter, clamp_height+2);
		translate(v = [clamp_length/2, 0, -1]) polyhole(m3_diameter, clamp_height+2);

		// nut holes
		translate(v = [-clamp_length/2, 0, -2])nut_s(5.5,3);
		translate(v = [clamp_length/2, 0, -2]) nut_s(5.5,3);

		// belt grip
		//translate(v = [0,offset,clamp_height-tooth_heigth])
		//for ( i = [round(-clamp_width/belt_pitch/2) : round(clamp_width/belt_pitch/2)]){
			//translate(v = [0,belt_pitch*i,tooth_heigth])cube(size = [belt_width, tooth_width, tooth_heigth*2], center = true);
		//}
	}

}


module beltclamp2(){

m3_diameter=3;

clamp_height = 8;
clamp_width = 10;
clamp_length = 18;		// distance between the center of the 2 holes

tooth_width = 2.5;
tooth_heigth = 1.75;
tooth_heigth = ram_length;
offset = 0;
// uncomment next line for a symetric clamp

	difference(){
		// basic shape
		union(0){
			translate(v = [0,0,clamp_height/2]) cube([clamp_length,clamp_width,clamp_height], center=true);
			translate(v = [-clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			translate(v = [clamp_length/2, 0, 0]) cylinder(r=clamp_width/2,h=clamp_height);
			}
		// screw holes
		translate(v = [-clamp_length/2, 0, -1])polyhole(m3_diameter, clamp_height+2);
		translate(v = [clamp_length/2, 0, -1]) polyhole(m3_diameter, clamp_height+2);

		// nut holes
		//translate(v = [-clamp_length/2, 0, +2])nut_s(5.5,3);
		//translate(v = [clamp_length/2, 0, +2]) nut_s(5.5,3);
	}

}

//translate([+wall * 3 + m3_diameter, -20, 0]) rotate([0,0,90]) beltclamp2();
//translate([+wall * 6 + 2*m3_diameter, -20, 0]) rotate([0,0,90]) beltclamp2();
//
translate([+wall * 9 + 3*m3_diameter, -20, 0]) rotate([0,0,90]) beltclamp();
//translate([+wall * 12 + 4*m3_diameter, -20, 0]) rotate([0,0,90]) beltclamp3();
//translate([0, -20, 0])clamp_base();
//translate([-wall * 2 - m3_diameter, -20, 0]) ram();