fixed the nut & finished the camera mount

display-camera-pi.scad

@@ -1,3 +1,17 @@
+/** Parameters */
+$camera_mount = true;
+$base = true;
+$screen_mount = true;
+$arm_pieces = 1;
+$screws = 1;
+$nuts = 1;
+/** Scale nuts up slightly for easier fit and less friction. */
+$nut_scale = 1.05;
+$nut_bumps = false;
+
+/** Code */
+module __no_more_parameters() {};
+
 $triangle_width = 65;
 $triangle_height = 40;
 $triangle_thickness = 5.87;
@@ -8,11 +22,21 @@ $triangle_y_hole_gap = 20;
 $triangle_x_offset = 19;
 $triangle_y_offset = 5;
 
-$fn=10;
+$fn = $preview ? 8 : 360;
+$steps_per_turn = $preview ? 8 : 128;
 
 use <Thread_Library.scad>
 
+if ($camera_mount) {
+    translate([0, -60, 0])
     camera_mount();
+}
+if ($base) {
+    translate([10, 0, 0]) attachment_point();
+}
+if ($screen_mount) {
+    translate([0, 40, 0]) screen_mount();
+}
 
 $camera_mount_thickness = 1;
 $camera_screw_gap_y = 25.2;
@@ -31,6 +55,29 @@ module camera_mount() {
         translate([-1 * $camera_screw_gap_y - $camera_screw_diameter / 1.33, -1 * $camera_screw_gap_y / 2, -0.1])
             cube([$camera_screw_gap_y, $camera_screw_gap_y, 3 * $camera_mount_thickness]);
     };
+    
+    $width = 20;
+    $thickness = 3;
+    $attachment_offset = 8.475;
+    
+    difference() {
+        union() {
+            color("orange")
+                translate([$width + $attachment_offset, $thickness / 2, $width / 2])
+                rotate([90, 0, 0])
+                cylinder(d=$width, h=$thickness);
+            intersection() {
+                translate([$width + $attachment_offset, $thickness / 2, 0])
+                    rotate([90, 0, 0])
+                    cylinder(h=$thickness, d=$width * 2);
+                translate([$attachment_offset, -$thickness / 2, 0])
+                    cube([$width, $thickness, $width]);
+            };
+        };
+        translate([$width + $attachment_offset, $thickness / 2, $width / 2])
+            rotate([90, 0, 0])
+            thread_hole_punch();
+    };
 }
 
 module attachment_point() {
@@ -78,25 +125,6 @@ module screen_mount() {
             cylinder(h=$screen_mount_thickness * 2, d=$screen_side_cutout_size);
         translate([0, $screen_mount_height / 2, -0.1])
             cylinder(h=$screen_mount_thickness * 2, d=$screen_side_cutout_size);
-        /*
-        translate([25, 0, -0.1])
-            rotate([0, 0, -30])
-            cube([$screen_mount_width, $screen_mount_height, $screen_mount_thickness * 2]);
-        translate([-10, -20, -0.1])
-            rotate([0, 0, 30])
-            cube([$screen_mount_width, $screen_mount_height, $screen_mount_thickness * 2]);
-        
-        translate([0, $screen_mount_height, 0])
-            mirror([0, 1, 0])
-                union() {
-                    translate([25, 0, -0.1])
-                        rotate([0, 0, -30])
-                        cube([$screen_mount_width, $screen_mount_height, $screen_mount_thickness * 2]);
-                    translate([-10, -20, -0.1])
-                        rotate([0, 0, 30])
-                        cube([$screen_mount_width, $screen_mount_height, $screen_mount_thickness * 2]);
-                };
-        */
     };
 };
 
@@ -121,3 +149,86 @@ module nose_rounding() {
             cylinder(h=$triangle_thickness * 3, d=$rounded_nose);
     };
 };
+
+module thread(backlash=0.1) {
+    scale([0.5, 0.5, 0.5])
+        trapezoidThread(length=35, backlash=backlash, stepsPerTurn=$steps_per_turn);
+}
+
+$screw_head_diameter = 25;
+$screw_head_thickness = 8;
+$nut_head_bump_thickness = 0.5;
+module nut_head(thickness=$screw_head_thickness) {
+    union() {
+        cylinder(d=$screw_head_diameter, h=thickness, $fn=6);
+        if ($nut_bumps)
+            translate([0, 0, thickness])
+                nut_bumps();
+    };
+}
+
+module nut_bumps() {
+    bump_length = $screw_head_diameter * 0.05;
+    bump_count = 24;
+    for (i = [0:1:bump_count - 1]) {
+        rotate([0, 0, i * (360 / bump_count)])
+        translate([$screw_head_diameter / 2 - bump_length * 3, 0, 0])
+            color("red")
+            cube([bump_length, $nut_head_bump_thickness, $nut_head_bump_thickness]);
+    }
+}
+
+for (i = [0:1:$screws - 1]) {
+    translate([-$screw_head_diameter, i * ($screw_head_diameter + 5), 0])
+        union() {
+            translate([0, 0, $screw_head_thickness - 4])
+                thread();
+            nut_head();
+        };
+}
+
+for (i = [0:1:$nuts - 1]) {
+    translate([-$screw_head_diameter * 2 - 8, i * ($screw_head_diameter + 5), 0])
+        difference() {
+            nut_head();
+            scale([$nut_scale, $nut_scale, 1])
+                translate([0, 0, -4]) thread(backlash=-0.2);
+        };
+}
+
+module arm_piece() {
+    union() {
+        $thickness = 3;
+        $length = 60;
+        $width = 20;
+        
+        difference() {
+            union() {
+                cube([$length, $width, $thickness]);
+                translate([0, $width / 2, 0])
+                    cylinder(h=$thickness, d=$width);
+                translate([$length, $width / 2, 0])
+                    cylinder(h=$thickness, d=$width);
+            };
+            translate([0, $width / 2, 0])
+                thread_hole_punch();
+            translate([$length, $width / 2, 0])
+                thread_hole_punch();
+        }
+        if ($nut_bumps) {
+            translate([0, $width / 2, $thickness])
+                nut_bumps();
+            translate([$length, $width / 2, $thickness])
+                nut_bumps();
+        }
+    }
+}
+for (i = [0:1:$arm_pieces - 1]) {
+    translate([0, (i + 1) * -40, 0])
+        arm_piece();
+}
+
+module thread_hole_punch(height=50) {
+    translate([0, 0, -0.1])
+        cylinder(d=13, h=height);
+}