Various updates

server_rack/Fan Mount/files/fan_holder_v2.scad

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+/*
+OPENSCAD Library file by the DoomMeister
+Mounting surround for small DC fans (25 - 120mm)
+
+Data taken from various places around the internet.
+http://www.qwikflow.com/dc_fans.html
+
+//Released under the terms of the GNU GPL v3.0
+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.
+
+This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//uncomment this for example
+//fan_mount(size=60,thick=3);
+
+module fan_mount(size=40,thick = 4)
+{
+if(size == 25)
+	{
+	_fan_mount(
+			fan_size = 25,
+			fan_mounting_pitch = 20,
+			fan_m_hole_dia = 3,
+			holder_thickness = thick
+		 );
+	}
+if(size == 30)
+	{
+	_fan_mount(
+			fan_size = 30,
+			fan_mounting_pitch = 24,
+			fan_m_hole_dia = 3,
+			holder_thickness = thick
+		 );
+	}
+
+if(size == 40)
+	{
+	_fan_mount(
+			fan_size = 40,
+			fan_mounting_pitch = 32,
+			fan_m_hole_dia = 3.5,
+			holder_thickness = thick
+		 );
+	}
+if(size == 45)
+	{
+	_fan_mount(
+			fan_size = 45,
+			fan_mounting_pitch = 37,
+			fan_m_hole_dia = 4.3,
+			holder_thickness = thick
+		 );
+	}
+if(size == 60)
+	{
+	_fan_mount(
+			fan_size = 60,
+			fan_mounting_pitch = 50,
+			fan_m_hole_dia = 4.4,
+			holder_thickness = thick
+		 );
+	}
+if(size == 80)
+	{
+	_fan_mount(
+			fan_size = 80,
+			fan_mounting_pitch = 71.5,
+			fan_m_hole_dia = 4.4,
+			holder_thickness = thick
+		 );
+	}
+
+if(size == 120)
+	{
+	_fan_mount(
+			fan_size = 120,
+			fan_mounting_pitch = 105,
+			fan_m_hole_dia = 4.4,
+			holder_thickness = thick
+		 );
+	}
+}
+
+
+//inner module
+module _fan_mount(
+			fan_size, //nominsl size of fan
+			fan_mounting_pitch, //pitch between mounting holes
+			fan_m_hole_dia, //mounting hole diameter
+			holder_thickness //user defined thickness
+		 )
+{
+
+offset1 = (fan_size-(fan_mounting_pitch + fan_m_hole_dia))/2;
+offset2 = (fan_size-(fan_mounting_pitch))/2;
+offset3 = offset2 + fan_mounting_pitch;
+thickness = (fan_size-fan_mounting_pitch)/2;	
+			
+			//difference()
+			//{
+			linear_extrude(height = holder_thickness)
+			union()
+			{	
+			difference()
+			{
+				translate([fan_m_hole_dia/2,fan_m_hole_dia/2,0])
+				minkowski()
+				{	
+					square([fan_size - fan_m_hole_dia,fan_size - fan_m_hole_dia]);
+					circle(r= fan_m_hole_dia/2, $fn=20);
+				}
+			
+					translate([offset1,offset1,0])
+					square([fan_mounting_pitch + fan_m_hole_dia,fan_mounting_pitch + fan_m_hole_dia]);
+				}
+				translate([offset2,offset2,0])
+				rotate([0,0,0])_corner_hole();
+				translate([offset3,offset2,0])
+				rotate([0,0,90])_corner_hole();
+				translate([offset2,offset3,0])
+				rotate([0,0,90])_corner_hole();
+				translate([offset3,offset3,0])
+				rotate([0,0,0])_corner_hole();
+			}
+
+module _corner_hole()
+{
+				difference(){
+					union(){
+							difference(){
+							square([fan_m_hole_dia + thickness,fan_m_hole_dia + thickness],center=true);
+							square([(fan_m_hole_dia + thickness)/2,(fan_m_hole_dia + thickness)/2],center=false);
+							translate([-(fan_m_hole_dia + thickness)/2,-(fan_m_hole_dia + thickness)/2])
+							square([(fan_m_hole_dia + thickness)/2,(fan_m_hole_dia + thickness)/2],center=false);
+							}
+					circle(r=(fan_m_hole_dia + thickness)/2, $fn=20);
+					}
+					circle(r=(fan_m_hole_dia)/2, $fn=20);
+				}
+}
+
+
+echo(offset1,offset2,thickness);
+}
+