feat: wallmount

models/wallmount/wallmount.scad

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+// import BOSL2
+include <BOSL2/std.scad>
+
+/* [Hidden] */
+// constants which shouldn't be changed
+$fn=100;
+
+// This is the HomeRacker base unit. don't change this!
+BASE_UNIT=15; // mm
+// Standard tolerance for the mount. This is a sane default.
+TOLERANCE=0.2; // mm
+// Base strength. This is a sane default.
+BASE_STRENGTH=2; // mm
+// Chamfer size. This is a sane default.
+CHAMFER=1; // mm
+// Lock Pin side length
+LOCK_PIN_SIDE=4; // mm
+// lock pin edge distance
+LOCK_PIN_EDGE_DISTANCE=5.5; // mm
+// lock pin chamfer
+LOCK_PIN_CHAMFER=0.8; // mm
+// Negative chamfer fix: 
+NEGATIVE_CHAMFER_TRANSLATE=0.01;
+
+mount_units=2;
+
+/* [Base] */
+// TODO: enable mount units
+// How many units shall the mount span across the support
+//mount_units=2; //[2:1:10]
+// Shall bores be countersunk or flathead
+bore_type="flathead"; //[flathead,countersunk]
+// Bore Shaft Diameter in mm 
+bore_shaft_diameter=4;
+// Bore Head Diameter in mm (only relevant if bore_type=countersunk)
+bore_head_diameter=8.5;
+
+
+/* [Finetuning] */
+// Defines the angle of the head rejuvenation. 90° is ISO standard. (only relevant if bore_type=countersunk)
+countersunk_angle=90;
+// Tolerance (in mm) for the bore holes. This is a sane default.
+bore_tolerance=0.2;
+
+// Calculate the head depth based on the countersunk angle.
+head_depth = bore_head_diameter/2 - bore_shaft_diameter/2 * tan( countersunk_angle/2 );
+
+
+echo("head_depth: ", head_depth);
+
+
+connector_width_net=BASE_UNIT+TOLERANCE;
+connector_width_gross=connector_width_net+BASE_STRENGTH*2;
+//Wall Mount
+mount_thickness=head_depth+BASE_STRENGTH;
+mount_height=mount_units*BASE_UNIT;
+mount_width=mount_units*2*BASE_UNIT+connector_width_gross;
+
+
+// Support Interface
+module mount(){
+  difference() {
+    union(){
+      cuboid([mount_width,mount_height,mount_thickness],anchor=CENTER+BOTTOM,chamfer=CHAMFER);
+      cuboid([connector_width_gross,mount_height,connector_width_gross],anchor=CENTER+BOTTOM,chamfer=CHAMFER);
+    }
+    translate([0,0,BASE_STRENGTH])
+    cuboid([connector_width_net,mount_height,connector_width_net],anchor=CENTER+BOTTOM);
+  }
+}
+
+// Lock pin Holes
+module lock_pin_hole(){
+  // fix for negative chamfer. Otherwise the holes would not reach the surface
+  translate([0,0,-NEGATIVE_CHAMFER_TRANSLATE/2])
+  cuboid(
+    size=[LOCK_PIN_SIDE,LOCK_PIN_SIDE,connector_width_gross+0.01],
+    anchor=CENTER+BOTTOM,
+    chamfer=-LOCK_PIN_CHAMFER,edges=[TOP,BOTTOM]
+    );
+}
+
+module lock_pin_holes(){
+  // ycopies
+  ycopies(BASE_UNIT,mount_units)
+  // Create cross
+  union(){
+    lock_pin_hole();
+    yrot(90,cp=[0,0,connector_width_gross/2])
+    lock_pin_hole();
+  }
+}
+
+//// Bores
+// Shafts
+module bore(){
+  bore_shaft_radius=(bore_shaft_diameter+bore_tolerance)/2;
+  bore_head_radius=(bore_head_diameter+bore_tolerance)/2;
+  if (bore_type=="flathead") {
+    cylinder(r=bore_shaft_radius,h=mount_thickness,anchor=CENTER+BOTTOM);
+  } else if (bore_type=="countersunk") {
+    // Countersunk
+    union() {
+      // Head
+      translate([0,0,mount_thickness])
+      cylinder(r1=bore_shaft_radius,r2=bore_head_radius,h=head_depth,anchor=CENTER+TOP);
+      // Shaft
+      cylinder(r=bore_shaft_radius,h=mount_thickness,anchor=CENTER+BOTTOM);
+    }
+    
+  }
+}
+
+bore_position_x=BASE_STRENGTH+BASE_UNIT/2+TOLERANCE/2+BASE_UNIT;
+echo("bore_position_x: ", bore_position_x);
+// Assembly
+union(){
+  difference() {
+    mount();
+    translate([-bore_position_x,0,0])
+    bore();
+    translate([bore_position_x,0,0])
+    bore();
+
+    // Lock Pin Holes
+    lock_pin_holes();
+  }
+  
+}