made threads a toggle

vitamins/corner_3d_connector.scad

@@ -0,0 +1,140 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Default is steel but can be drawn as brass or nylon. A utility for making nut traps included.
+//!
+//! 3D corner connector with t-nut 
+//!
+//! The following diagram shows you the parameters for the nut parameters:
+//!
+//! ![](docs/sliding_t_nut.png)
+//
+
+include <NopSCADlib/core.scad>
+include <NopSCADlib/utils/thread.scad>
+
+
+
+function outer_side_length(type) = type[1]; //! The length of the base cuboid sides
+function outer_height(type) = type[2]; //! The height of the cuboid 
+function inner_side_length(type)= type[3]; //! The length of the dip in the cuboid sides
+function inner_height(type) = type[4]; //! The depth offset of the dip in the cuboid
+
+function nut_screw_dia(type) = type[5]; //! The diameter of the screw
+function nut_dia(type) = type[6]; //! The width of bottom part of the nut
+function nut_thickness(type) = type[7]; //! The thickness of the top part of the nut
+function nut_nyloc_thickness(type) = type[8]; //! The total thickness of the nut
+function nut_sx(type) = type[9]; //! The lenght of the nuts
+function nut_ty1(type) = type[10]; //! The total width of the nut
+function nut_ty2(type) = type[11]; //! The width of the top edge of the nut
+function nut_screws_hor(type)=type[12]; //! The positions of the screw holes on the horizontal arms, expressed in %/100 of the nut arm
+function nut_screws_ver(type)=type[13]; //! The positions of the screw holes on the vertical arms, expressed in %/100 of the nut arm
+
+
+module corner_3d_connector (type, thread = false) {
+    nut_screw_dia = nut_screw_dia(type);
+    nut_dia = nut_dia(type);
+    nut_thickness = nut_thickness(type);
+    nut_nyloc_thickness = nut_nyloc_thickness(type);
+    nut_sx = nut_sx(type);
+    nut_ty1 = nut_ty1(type);
+    nut_ty2= nut_ty2(type);
+
+    
+
+nut_profile = [
+    [0, nut_dia/2],
+    [nut_nyloc_thickness-nut_thickness, nut_dia/2],
+    [nut_nyloc_thickness-nut_thickness, nut_ty1/2],
+    [nut_nyloc_thickness-nut_thickness + (nut_ty1-nut_ty2)/2, nut_ty1/2],
+    [nut_nyloc_thickness, nut_ty2/2],
+    [nut_nyloc_thickness, -nut_ty2/2],
+    [nut_nyloc_thickness-nut_thickness + (nut_ty1-nut_ty2)/2, -nut_ty1/2],
+    [nut_nyloc_thickness-nut_thickness, -nut_ty1/2],
+    [nut_nyloc_thickness-nut_thickness, -nut_dia/2],
+    [0, -nut_dia/2]
+];
+
+
+    outer_side_length = outer_side_length(type);
+    outer_height = outer_height(type);
+    inner_side_length= inner_side_length(type);
+    inner_height = inner_height(type);
+    inner_offset_z = outer_height-inner_height+0.01;
+    r=1;
+    color("lightgray")
+    union() {
+    
+    //create the base
+    difference () {
+        rounded_cube_xy([outer_side_length, outer_side_length, outer_height], r=r);
+        translate([(outer_side_length-inner_side_length)/2,(outer_side_length-inner_side_length)/2,inner_offset_z])
+        rounded_cube_xy([inner_side_length, inner_side_length, inner_height], r=r);
+    }
+    
+    //position the nuts on the base
+    positions_horizontal = [
+        [outer_side_length/2,0.001,nut_nyloc_thickness,0,90,270],
+        [outer_side_length-0.001,outer_side_length/2,nut_nyloc_thickness, 0,90,0]
+    ];
+    positions_vertical = [
+        [0,outer_side_length/2,inner_offset_z,0,0,0],
+        [outer_side_length/2,outer_side_length,inner_offset_z,0,0,270],
+    ];
+    
+
+     for (pos = positions_horizontal) {
+        translate([pos[0],pos[1],pos[2]])
+        rotate([pos[3],pos[4],pos[5]])
+            difference() {
+            linear_extrude(nut_sx)
+            polygon(nut_profile);
+            //create the screw holes
+            for ( dist = nut_screws_hor(type) ){
+            translate([-0.01,0,nut_sx*dist])
+                rotate([0,90,0])
+                difference() {
+                    cylinder(h = nut_nyloc_thickness+0.02, d=nut_screw_dia, center = false);
+                    if(thread)
+                    female_metric_thread(nut_screw_dia, metric_coarse_pitch(nut_screw_dia), nut_nyloc_thickness, center = false);
+                }
+            }
+        }
+     }
+     for (pos = positions_vertical) {
+        translate([pos[0],pos[1],pos[2]])
+        rotate([pos[3],pos[4],pos[5]])
+            difference() {
+            linear_extrude(nut_sx)
+            polygon(nut_profile);
+            //create the screw holes
+            for ( dist = nut_screws_ver(type) ){
+            translate([-0.01,0,nut_sx*dist])
+                rotate([0,90,0])
+                difference() {
+                    cylinder(h = nut_nyloc_thickness+0.02, d=nut_screw_dia, center = false);
+                    if(thread)
+                    female_metric_thread(nut_screw_dia, metric_coarse_pitch(nut_screw_dia), nut_nyloc_thickness, center = false);
+                }
+            }
+        }
+     }
+}
+}

vitamins/corner_3d_connectors.scad

@@ -30,9 +30,11 @@ corner_3d_connectors = [corner_3d_connector_2020,corner_3d_connector_3030,corner
 
 use <corner_3d_connector.scad>
 
+$show_threads = true;
 
-corner_3d_connector(corner_3d_connector_2020);
+
+corner_3d_connector(corner_3d_connector_2020, false);
 translate([50,0,0])
-corner_3d_connector(corner_3d_connector_3030);
+corner_3d_connector(corner_3d_connector_3030, false);
 translate([120,0,0])
-corner_3d_connector(corner_3d_connector_4040);
+corner_3d_connector(corner_3d_connector_4040, false);