update

cases/rack/body/m4Leg.scad

@@ -0,0 +1,158 @@
+include <../common.scad>
+include <./screws.scad>
+
+
+//slack = 0.5;
+//m3Diameter = 3.0;
+//m3Radius = m3Diameter/2.0;
+//m3ptr = m3Radius + slack;
+
+legWidth = 16;
+legLength = 16;
+legHeight = 60;
+
+legFrontThickness = 6;
+legSupportThickness = 4;
+
+legWingThickness = 4;
+legWingLength = 9;
+
+// 9.5 to account for space for inserting hex nuts at the top
+legWingWidth = 9.5+legSupportThickness;
+
+
+module legWing() {
+  difference() {
+    cube(size=[legWingLength, legWingThickness, legWingWidth]);
+
+    union() {
+      translate(v=[4,0,10])
+        rotate(a=[90,0,0])
+        cylinder(r=m3RadiusSlacked, h=20, center=true);
+
+      translate(v=[14,0,10])
+        rotate(a=[90,0,0])
+        cylinder(r=m3RadiusSlacked, h=20, center=true);
+    }
+  }
+}
+
+module base() {
+    difference() {
+      cube(size=[25,25,legWingThickness]);
+
+      union() {
+      translate(v=[20,20,0])
+        cylinder(r=m3RadiusSlacked, h=100, center=true);
+
+      translate(v=[10,10,0])
+        cylinder(r=m3RadiusSlacked, h=100, center=true);
+
+      translate(v=[20,10,0])
+        cylinder(r=m3RadiusSlacked, h=100, center=true);
+
+      translate(v=[10,20,0])
+        cylinder(r=m3RadiusSlacked, h=100, center=true);
+      }
+      
+    }
+}
+
+module baseLeg(legHeight) {
+  union() {
+    difference() {
+      cube(size=[16,16, legHeight]);
+
+      union() {
+        translate(v=[4,6,0])
+          cube(size=[16, 16, legHeight]);
+
+        // compensate for differences between leg/wing thickness
+        translate(v=[legSupportThickness,legSupportThickness,0])
+          cube(size=[legWidth,legWidth,legSupportThickness+10]);
+
+        translate(v=[legSupportThickness,legSupportThickness,legHeight-legWingWidth])
+          cube(size=[legWidth,legWidth,legSupportThickness+10]);
+
+      }
+    }
+
+    translate(v=[16,0,0])
+      legWing();
+
+
+    translate(v=[16,0,legHeight])
+      mirror(v=[0,0,1]) {
+      legWing();
+    }
+
+    mirror(v=[1,-1,0]) {
+      translate(v=[16,0,0])
+        legWing();
+
+
+      translate(v=[16,0,legHeight])
+        mirror(v=[0,0,1]) {
+        legWing();
+      }
+    }
+
+  }
+
+  base();
+
+  translate(v=[0,0,legHeight-legWingThickness])
+    base();
+}
+
+*baseLeg(180);
+
+module leg(ui) {
+  assert(ui > 0);
+
+  legLength = 20 + (ui-1)*10;
+  
+  difference() {
+    baseLeg(legLength);
+
+    union() {
+        
+      intersection() {
+        union() {
+          for (i = [1:ui-2]) {
+            translate(v=[0,10,(i+1)*10])
+              rotate(a=[0,90,0])
+              *cylinder(h = 100, r = m3ptr, $fn=32, center=true);
+
+            translate(v=[10,3,(i+1)*10])
+              rotate(a=[90,-10,0])
+              m4HexNutPocketNegative();
+          }
+        }      
+        translate(v=[-1,-1,legWingWidth])
+          cube(size=[1000,1000,legLength-2*legWingWidth]);
+      }
+
+      translate(v=[0,10,10])
+        rotate(a=[0,90,0])
+        cylinder(h = 100, r = m3ptr, $fn=32, center=true);
+
+      translate(v=[0,10,ui*10])
+        rotate(a=[0,90,0])
+        cylinder(h = 100, r = m3ptr, $fn=32, center=true);
+
+
+      translate(v=[10,0,10])
+        rotate(a=[90,0,0])
+        cylinder(h = 100, r = m3ptr, $fn=32, center=true);
+
+      translate(v=[10,0,ui*10])
+        rotate(a=[90,0,0])
+        cylinder(h = 100, r = m3ptr, $fn=32, center=true);
+    }
+  }
+}
+
+
+//mirror(v=[1,0,0])
+leg(20);