Merge remote-tracking branch 'upstream/master' into new-bushing

[clinton/prusa3.git] / box_frame / y-axis-bracket.scad

diff --git a/box_frame/y-axis-bracket.scad b/box_frame/y-axis-bracket.scad
new file mode 100644 (file)
index 0000000..8adb604
--- /dev/null
+++ b/box_frame/y-axis-bracket.scad
@@ -0,0 +1,77 @@
+include <configuration.scad>
+
+module bolt_track(width, length, height) {
+    hwidth = width / 2;
+    hdiff = hwidth - height;
+    union() {
+        difference() {
+            rotate([90, 0, 0])
+                translate([hwidth, height, -length])
+                cylinder(h=length, r=hwidth, $fn=$fn);
+
+            if (height < hwidth) {
+                translate([0, -1, height - hwidth - 1])
+                    cube([width, length + 2, hdiff + 1]);
+            }
+        }
+        cube([width, length, height]);
+    }
+}
+
+function bracket_width(screw_area) = screw_area * 2 + threaded_rod_diameter;
+function bracket_depth(lip_thickness, screw_area) = screw_area * 2 + lip_thickness;
+function bracket_height(lip_length) = board_thickness + lip_length;
+
+module beveled_box(size, bevel_size=4) {
+    function pythag(a, b) = sqrt(a * a + b * b);
+    function bevelradius(x, y, bevel) = pythag(x, y) - bevel * max(x, y) / min(x, y);
+
+    xzbevel = bevelradius(size[0], size[2], bevel_size);
+    yzbevel = bevelradius(size[1], size[2], bevel_size);
+    intersection() {
+        cube(size);
+        translate([size[0] / 2, size[1] / 2, size[2] / 2])
+            rotate([0, 45, 0])
+            cube([xzbevel, size[1], xzbevel], center=true);
+        translate([size[0] / 2, size[1] / 2, size[2] / 2])
+            rotate([45, 0, 0])
+            cube([size[0], yzbevel, yzbevel], center=true);
+    }
+}
+
+module yrodbracket(screw_area, lip_thickness, lip_length, bevel_size=2.0) {
+    inner_radius = threaded_rod_diameter / 2;
+    screw_center = screw_area / 2;
+
+    width = bracket_width(screw_area);
+    depth = bracket_depth(lip_thickness, screw_area);
+    height = bracket_height(lip_length);
+
+    difference() {
+        translate([0, 0, -lip_length])
+            beveled_box([width, depth, height], bevel_size);
+        translate([screw_area, -1, -lip_length - lip_thickness])
+            bolt_track(threaded_rod_diameter, depth + 2, lip_length + lip_thickness + inner_radius);
+
+        translate([-1, lip_thickness, -lip_length - 1])
+            cube([width + 2, depth, lip_length + 1]);
+
+        // screw holes
+        for (x = [screw_center, width - screw_center]) {
+            for (y = [lip_thickness + screw_center, screw_area + lip_thickness + screw_center]) {
+                translate([x, y, board_thickness])
+                    rotate([180, 0, 0])
+                    screw();
+            }
+        }
+    }
+}
+
+rotate([90, 0, 0]) {
+    for (x = [0, bracket_width(12) + 5]) {
+        for (y = [0, bracket_height(3) + 5]) {
+            translate([x, 0, y])
+                yrodbracket(12, 3, 3);
+        }
+    }
+}