//sgn, January 2022.
//touch probe sketch
//not really designed for public consumption, but here's the openscad code anyways.

$fn = 32;

#probe_body();


#probe_cap();

probe_tip_holder();

tip();

pcb_base_plate();


spring();

rotate([0,0,9])
balls();
rotate([0,0,-9])
balls();

for(i = [0:2]){
    color("silver", 1.0){
    rotate([0,0,i*120+60])
    translate([23,0,18])
    4mm_bolt();
}
}

module pcb_base_plate(){

difference(){
union(){
color("green", 1.0){
//main plate
translate([0,0,17.5])
cylinder(d = 57, h = 1, center = true);
}
difference(){
color("gold", 1.0){
translate([0,0,17.4])
cylinder(d = 47, h = 1, center = true);
}
color("green", 1.0){
translate([0,0,16])
cylinder(d = 46, h = 2, center = true);
}
}

}

//main hole
translate([0,0,15])
cylinder(d = 36, h = 20, center = true);

translate([0,0,16])
cylinder(d = 46, h = 2, center = true);


for(i = [0:2]){
    color("gold", 1.0){
    rotate([0,0,i*120+9])
    translate([23,0,18])
    cylinder(d=6.15, h = 4, center = true);

    rotate([0,0,i*120-9])
    translate([23,0,18])
    cylinder(d=6.15, h = 6, center = true);
}
}
//space for balls
rotate([0,0,9])
balls();
rotate([0,0,-9])
balls();

//wire holes
    translate([13,19,18])
   cylinder(d=2, h = 8, center = true);

    translate([15.5,17,18])
   cylinder(d=2, h = 8, center = true);


}
}






module balls(){
translate([0,0,23])
//balls
for(i = [0:2]){
    color("silver", 1.0){
    rotate([0,0,i*120])
    translate([23,0,-7])
    sphere(d = 6.35);
}

}
}

module probe_tip_holder(){
translate([0,0,20]){
difference(){
union(){

//three hole
translate([0,0,-7.5])
cylinder(d = 35, h = 8, center = true);

translate([0,0,0])
cylinder(d = 20, h = 20, center = true);

translate([0,0,16])
cylinder(d1 = 20, d2 = 15, h = 12, center = true);


}
//pin holes
for(i = [0:2]){

    rotate([0,0,i*120])
    translate([14,0,-7])
    rotate([0,90,0])
    cylinder(d = 3, h = 27, center = true);

}
//hole for probe tip
    translate([0,0,20])
    cylinder(d = 3, h = 27, center = true);

//hole for spring
translate([0,0,-16])
cylinder(d = 20, h = 12, center = true);
}
//PINS
for(i = [0:2]){
    color("silver", 1.0){
    rotate([0,0,i*120])
    translate([15,0,-7])
    rotate([0,90,0])
    cylinder(d = 3, h = 25, center = true);
}

}
}
}

module probe_body(){
difference(){
translate([0,0,3])
cylinder(d = 70, h = 44, center = true);

translate([0,0,-15])
cylinder(d = 60, h = 70, center = true);

translate([0,0,25])
cylinder(d = 23, h = 40, center = true);
}
}

module probe_cap(){
translate([0,0,-24]){
difference(){
union(){
cylinder(d = 70, h = 10, center = true);

translate([0,0,4])
cylinder(d = 60, h = 10, center = true);

translate([0,0,-15])
cylinder(d = 20, h = 30, center = true);

}
//threw hole for screw to adjust tension of spring
translate([0,0,-17])
cylinder(d = 10, h = 60, center = true);

//to hold spring centered
translate([0,0,10])
cylinder(d = 22, h = 10, center = true);
}
}
}



module tip(){
color("silver", 1){
translate([0,0,40])
cylinder(d = 3, h = 50, center = true);

translate([0,0,45])
cylinder(d1 = 6, d2 = 3, h = 9, center = true);
}

color("red", 1){
translate([0,0,65])
sphere(d = 6);
}
}

module spring(){
color("silver", 0.8){
translate([0,0,-5])
//cylinder(d = 17, h = 30, center = true);
linear_extrude(30, center = true, convexity = 10, slices = 200,twist = 2000, $fn = 32)
translate([7,0,0])
circle(d = 3);
}
}

module 4mm_bolt(){
translate([0,0,10])
cylinder(d = 7.2, h = 4, center = true);

translate([0,0,5])
cylinder(d = 3.9, h = 10, center = true);

}