initial work for rack_1u case, rack.scad with mounting tabs

2025-04-29 14:45:29 -04:00
parent 415d5532a1
commit 5aebb0d549
4 changed files with 384 additions and 10 deletions
--- a/lib/rack.scad
+++ b/lib/rack.scad
@@ -0,0 +1,83 @@
+/*
+    This file is part of SBC Case Builder https://github.com/hominoids/SBC_Case_Builder
+    Copyright 2022,2023,2024,2025 Edward A. Kisiel hominoid@cablemi.com
+
+    This program 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.
+
+    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 this program.  If not, see <http://www.gnu.org/licenses/>
+    Code released under GPLv3: http://www.gnu.org/licenses/gpl.html
+
+    rack_end_bracket(side, size, thick)
+
+*/
+
+
+/*
+           NAME: rack_end_bracket
+    DESCRIPTION: creates rack mounting ears
+           TODO: none
+
+          USAGE: rack_end_bracket(side, size, thick)
+
+                             side = "left", "right"
+                             size = "1u", "2u", "3u", "4u"
+                            thick = thickness of bracket
+
+*/
+
+module rack_end_bracket(side, size, thick) {
+
+    depth = size == "1u" ? 44.45 : size == "2u" ? 2*44.45 : size == "3u" ? 3*44.45 : 4*44.45;
+    c_fillet = 2;
+    hole = 3.2;
+    rack_hole = 6;
+    tab_width = 25;
+    b_width = thick;
+    b_depth = depth;
+    b_height = 25;
+    b_loc = [-thick,0,0];
+
+    adjust = .01;
+    $fn=90;
+
+    if(side == "left") {
+        translate([thick,-thick,depth]) rotate([270,0,0]) 
+        difference() {
+            union() {
+                translate([(-tab_width/2),(depth/2),thick/2]) 
+                    cube_fillet_inside([tab_width,depth,thick], 
+                        vertical=[0,c_fillet,c_fillet,0],top=[0,0,0,0],bottom=[0,0,0,0], $fn=90);
+                translate([(b_width/2)+b_loc[0],(b_depth/2)+b_loc[1],(b_height/2)+b_loc[2]])         
+                    cube_fillet_inside([b_width,b_depth,b_height], 
+                        vertical=[0,0,0,0],top=[c_fillet,0,c_fillet,0],bottom=[0,0,0,0], $fn=90);
+            }
+            for (c=[7.5:15:depth]) {
+                translate([-15,c,-adjust]) slot(rack_hole,3,thick+(adjust*2));
+            }
+        }
+    }
+    if(side == "right") {
+        translate([-thick,-thick,0]) rotate([270,180,0]) 
+        difference() {
+            union() {
+                translate([(-tab_width/2),(depth/2),thick/2]) 
+                    cube_fillet_inside([tab_width,depth,thick], 
+                        vertical=[0,c_fillet,c_fillet,0],top=[0,0,0,0],bottom=[0,0,0,0], $fn=90);
+                translate([(b_width/2)+b_loc[0],(b_depth/2)+b_loc[1],(b_height/2)+b_loc[2]])         
+                    cube_fillet_inside([b_width,b_depth,b_height], 
+                        vertical=[0,0,0,0],top=[c_fillet,0,c_fillet,0],bottom=[0,0,0,0], $fn=90);
+            }
+            for (c=[7.5:15:depth]) {
+                translate([-15,c,-adjust]) slot(rack_hole,3,thick+(adjust*2));
+            }
+        }
+    }
+}