// Created by Christian A. Weber <chris@gna.ch> on 2017-01-07
// http://www.kinety.org/adding-a-monitor-camera-to-the-bq-hephestos-2-3d-printer/

$fa=1; $fs=0.25;	// global resolution

$plate_size = 6;
$r_fillet = 2.5;
$r_inner = 10;
$arm_width = 25;

// mounting plate. Fits into mounting holes on Hephestos 2's arm that moves along the z-axis
translate([0, 0, 0]) {
    difference() {
        union() {
            translate([1 + $r_fillet, $r_fillet, 0])  minkowski() {
                cube([98 - $r_fillet * 2, 75 - $r_fillet * 2, $plate_size-1]);
                cylinder(r=$r_fillet, h=1);
            }
            translate([0, 11, 0]) cube([1, 55, $plate_size]);
            translate([99, 55, 0]) cube([1, 13, $plate_size]);
        }
        
        // save some material
        translate([60, -1, -1]) cube([40, 51, $plate_size + 2]);
        hull() {
            // make room for the camera and allow it to tilt
            translate([20 + $r_inner, 10, -1]) cube([64 - $r_inner, 59 - $r_inner, $plate_size + 2]);
            translate([20 + $r_inner, 68 - $r_inner, -1]) cylinder(r=$r_inner, h=$plate_size + 2);
            translate([84 - $r_inner, 68 - $r_inner, -1]) cylinder(r=$r_inner, h=$plate_size + 2);
            translate([20 + $r_inner, 10 + $r_inner, -1]) cylinder(r=$r_inner, h=$plate_size + 2);
        }
    }
}

// camera support arm
translate([47.5 + $arm_width/2, 0, $plate_size-.001]) rotate([90, 0, 180]) {
    difference() {
        hull() {
            translate([0, 0, 0]) cube([$arm_width, 5, 6]);
            translate([$arm_width/2, 20, 0]) cylinder(r=6, h=6);
        }
    
        translate([$arm_width/2, 20, 0]) union() {
            // hole for camera's mounting screw: 2mm diameter
            translate([0, 0, -1]) cylinder(r=1, h=8);
    
            // camera's mounting inset is 4mm in diameter and 1.5mm high
            translate([0, 0, 6-1.5]) cylinder(r=2.2, h=2.5);

            // countersink camera's mounting screw by 2mm
            translate([0, 0, -1]) cylinder(r=3, h=3);
        }
    }
}