klipper update

docs/prints/calibrate_size.scad

@@ -0,0 +1,77 @@
+// Calibration object for delta sizing
+//
+// Generate STL using OpenSCAD:
+//   openscad calibrate_size.scad -o calibrate_size.stl
+
+base_radius = 70;
+base_height = 1.5;
+base_width = 8;
+cylinder_height = 5;
+cylinder_radius = 5;
+cylinder_outer_dist = 65;
+ridge_cut_radius = .5;
+text_height = 1;
+text_size = 5;
+spoke_angles = [0, 60, 120, 180, 240, 300];
+CUT=0.01;
+
+// Circular ring around entire object (to help reduce warping)
+module base_ring() {
+    difference() {
+        cylinder(h=base_height, r=base_radius);
+        translate([0, 0, -CUT])
+            cylinder(h=base_height + 2*CUT, r=base_radius-base_width);
+    }
+}
+
+// The base ring plus the base spokes
+module base() {
+    base_ring();
+    // Spokes
+    for (angle=spoke_angles)
+        rotate([0, 0, angle])
+            translate([-base_width/2, -CUT, 0])
+                cube([base_width, base_radius-base_width+2*CUT, base_height]);
+}
+
+// Cylinder that measurement ridges are cut out of
+module measuring_cylinder() {
+    cut_width = cylinder_radius;
+    difference() {
+        cylinder(h=cylinder_height+CUT, r=cylinder_radius, $fn=60);
+        for (angle=spoke_angles)
+            rotate([0, 0, angle])
+                translate([-cut_width, cylinder_radius - ridge_cut_radius, -CUT])
+                    cube([2*cut_width, cut_width, cylinder_height+3*CUT]);
+    }
+}
+
+// All the measuring cylinders around the ring
+module measuring_cylinders() {
+    measuring_cylinder();
+    for (angle=spoke_angles)
+        rotate([0, 0, angle])
+            translate([0, cylinder_outer_dist, 0])
+                measuring_cylinder();
+}
+
+// Text writing
+module write_text(angle, dist, msg) {
+    text_offset = dist + 1 - text_size/2;
+    rotate([0, 0, angle])
+        translate([0, text_offset, base_height - CUT])
+            linear_extrude(height=text_height + CUT)
+                text(msg, size=text_size, halign="center");
+}
+
+// Final object with text descriptions
+module calibration_object() {
+    base();
+    translate([0, 0, base_height-CUT])
+        measuring_cylinders();
+    write_text(120, cylinder_outer_dist - 20, "A");
+    write_text(240, cylinder_outer_dist - 20, "B");
+    write_text(0, cylinder_outer_dist - 20, "C");
+}
+
+calibration_object();

docs/prints/square.scad

@@ -0,0 +1,45 @@
+// Test square
+//
+// Generate STL using OpenSCAD:
+//   openscad square.scad -o square.stl
+
+square_width = 5;
+square_size = 60;
+square_height = 5;
+
+module hollow_square() {
+    difference() {
+        cube([square_size, square_size, square_height]);
+        translate([square_width, square_width, -1])
+            cube([square_size-2*square_width, square_size-2*square_width,
+                  square_height+2]);
+    }
+}
+
+module notch() {
+    CUT = 0.01;
+    depth = .5;
+    width = 1;
+    translate([-depth, -width, -CUT])
+        cube([2*depth, 2*width, square_height + 2*CUT]);
+}
+
+module square_with_notches() {
+    difference() {
+        // Start with initial square
+        hollow_square();
+        // Remove four notches on inside perimeter
+        translate([square_width, square_size/2 - 4, 0])
+            notch();
+        translate([square_size/2, square_size - square_width, 0])
+            rotate([0, 0, 90])
+                notch();
+        translate([square_size - square_width, square_size/2, 0])
+            notch();
+        translate([square_size/2, square_width, 0])
+            rotate([0, 0, 90])
+                notch();
+    }
+}
+
+square_with_notches();

docs/prints/square.stl

@@ -0,0 +1,674 @@
+solid OpenSCAD_Model
+  facet normal -1 0 0
+    outer loop
+      vertex 0 0 0
+      vertex 0 60 5
+      vertex 0 60 0
+    endloop
+  endfacet
+  facet normal -1 -0 0
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+      vertex 0 60 5
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+      vertex 60 60 0
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+      vertex 29 4.5 5
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+endsolid OpenSCAD_Model

docs/prints/square_tower.scad

@@ -0,0 +1,61 @@
+// Calibration test tower
+//
+// Generate STL using OpenSCAD:
+//   openscad square_tower.scad -o square_tower.stl
+
+square_width = 5;
+square_size = 60;
+square_height = 50;
+antiwarp_height = .8;
+antiwarp_radius = 5;
+CUT = 0.01;
+
+module notch(x, y, rot) {
+    depth = .5;
+    width = 1;
+    translate([x, y, 0])
+        rotate([0, 0, rot])
+            translate([-depth, -width, -CUT])
+                cube([2*depth, 2*width, square_height + 2*CUT]);
+}
+
+module square_with_notches() {
+    difference() {
+        // Start with initial square
+        cube([square_size, square_size, square_height]);
+        // Remove four notches on inside perimeter
+        notch(square_width, square_size/2 - 4, 0);
+        notch(square_size - square_width, square_size/2, 0);
+        notch(square_size/2, square_width, 90);
+        notch(square_size/2, square_size - square_width, 90);
+    }
+}
+
+module anti_warp_feet() {
+    module anti_warp_cylinder() {
+        cylinder(r=antiwarp_radius, h=antiwarp_height, $fs=.5);
+    }
+    dist = antiwarp_radius / 2.5;
+    translate([dist, dist, 0])
+        anti_warp_cylinder();
+    translate([square_size-dist, dist, 0])
+        anti_warp_cylinder();
+    translate([dist, square_size-dist, 0])
+        anti_warp_cylinder();
+    translate([square_size-dist, square_size-dist, 0])
+        anti_warp_cylinder();
+}
+
+module hollow_square() {
+    difference() {
+        union() {
+            square_with_notches();
+            anti_warp_feet();
+        }
+        translate([square_width, square_width, -CUT])
+            cube([square_size-2*square_width, square_size-2*square_width,
+                  square_height + 2*CUT]);
+    }
+}
+
+hollow_square();