Improved the PCB holder.

etching/cad_etching_bath/v2.0/pcb_holder_crossbar.scad

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+/////////////////////////////////////////////////////////////////////////////////
+// Adapter for drilling machine in the embedded lab.
+//
+// Author:              Maximilian Stiefel
+// Last modification:   07.06.2017
+/////////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////////
+// Vars
+/////////////////////////////////////////////////////////////////////////////////
+crossbar_depth = 175;
+crossbar_height = 5;
+crossbar_width = 5;
+
+/////////////////////////////////////////////////////////////////////////////////
+// Action
+/////////////////////////////////////////////////////////////////////////////////
+cube([crossbar_width, crossbar_depth, crossbar_height], center = true);

etching/cad_etching_bath/v2.0/pcb_holder_crossbar.stl

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+solid OpenSCAD_Model
+  facet normal -0 0 1
+    outer loop
+      vertex -2.5 87.5 2.5
+      vertex 2.5 -87.5 2.5
+      vertex 2.5 87.5 2.5
+    endloop
+  endfacet
+  facet normal 0 0 1
+    outer loop
+      vertex 2.5 -87.5 2.5
+      vertex -2.5 87.5 2.5
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+    endloop
+  endfacet
+  facet normal 0 0 -1
+    outer loop
+      vertex -2.5 -87.5 -2.5
+      vertex 2.5 87.5 -2.5
+      vertex 2.5 -87.5 -2.5
+    endloop
+  endfacet
+  facet normal -0 0 -1
+    outer loop
+      vertex 2.5 87.5 -2.5
+      vertex -2.5 -87.5 -2.5
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+    endloop
+  endfacet
+  facet normal 0 -1 0
+    outer loop
+      vertex -2.5 -87.5 -2.5
+      vertex 2.5 -87.5 2.5
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+    endloop
+  endfacet
+  facet normal 0 -1 -0
+    outer loop
+      vertex 2.5 -87.5 2.5
+      vertex -2.5 -87.5 -2.5
+      vertex 2.5 -87.5 -2.5
+    endloop
+  endfacet
+  facet normal 1 -0 0
+    outer loop
+      vertex 2.5 -87.5 2.5
+      vertex 2.5 87.5 -2.5
+      vertex 2.5 87.5 2.5
+    endloop
+  endfacet
+  facet normal 1 0 0
+    outer loop
+      vertex 2.5 87.5 -2.5
+      vertex 2.5 -87.5 2.5
+      vertex 2.5 -87.5 -2.5
+    endloop
+  endfacet
+  facet normal 0 1 -0
+    outer loop
+      vertex 2.5 87.5 -2.5
+      vertex -2.5 87.5 2.5
+      vertex 2.5 87.5 2.5
+    endloop
+  endfacet
+  facet normal 0 1 0
+    outer loop
+      vertex -2.5 87.5 2.5
+      vertex 2.5 87.5 -2.5
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+    endloop
+  endfacet
+  facet normal -1 0 0
+    outer loop
+      vertex -2.5 -87.5 -2.5
+      vertex -2.5 87.5 2.5
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+    endloop
+  endfacet
+  facet normal -1 -0 0
+    outer loop
+      vertex -2.5 87.5 2.5
+      vertex -2.5 -87.5 -2.5
+      vertex -2.5 -87.5 2.5
+    endloop
+  endfacet
+endsolid OpenSCAD_Model

etching/cad_etching_bath/v2.0/pcb_holder_holder_l.scad

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+/////////////////////////////////////////////////////////////////////////////////
+// Adapter for drilling machine in the embedded lab.
+//
+// Author:              Maximilian Stiefel
+// Last modification:   10.06.2017
+/////////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////////
+// Vars
+/////////////////////////////////////////////////////////////////////////////////
+// Dimesions holder
+holder_height = 160;
+holder_width = 15;
+holder_depth = 5;
+
+// Dimensions notch
+notch_height = 135;
+notch_width = 2;
+notch_depth = 3;
+
+// General allowance
+allowance = 0.5;
+
+// Dimensions crossbar
+crossbar_height = 5 + allowance;
+crossbar_width = 5 + allowance;
+
+// Dimensions lid
+lid_thickness = 3;
+lid_slot_width = 8;
+
+// Dimensions neck
+neck_width = lid_slot_width - allowance;
+neck_depth = holder_depth;
+neck_height = lid_thickness + allowance;
+
+// Dimensions head 
+head_width = holder_width;
+head_depth = holder_depth;
+head_height = 5;
+
+// Suitable for M3 screw thread
+hole_diameter = 2.5;
+
+// Height difference between notch for PCB and the actual holder
+height_diff_1 = holder_height - notch_height;
+
+// Width difference between crossbar and holder
+width_diff_1 = holder_width - crossbar_width;
+
+// Width difference between holder and neck
+width_diff_2 = holder_width - neck_width;
+
+/////////////////////////////////////////////////////////////////////////////////
+// Action
+/////////////////////////////////////////////////////////////////////////////////
+difference()
+{
+union()
+{
+	// Cube for the base holder
+	cube([holder_width, holder_depth, holder_height], center = false);
+	// Head
+	translate([0, 0, holder_height + neck_height])
+	cube([head_width, head_depth, head_height]);
+	// Neck
+	translate([width_diff_2/2, 0, holder_height])
+	cube([neck_width, neck_depth, neck_height]);
+}
+
+union()
+{
+	// Cube for notch
+	translate([holder_width/2 - notch_width/2, -1, height_diff_1/2])
+	cube([notch_width, notch_depth, notch_height], center = false);
+
+	// Slots for crossbars
+	translate([width_diff_1/2, -1, (1/4)*height_diff_1 - crossbar_height/2])
+	cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
+	translate([width_diff_1/2, -1, (3/4)*height_diff_1 + notch_height - crossbar_height/2])
+	cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
+
+	// Drill holes for screws
+	translate([0, holder_depth/2, (1/4)*height_diff_1])
+	rotate([0, 90, 0])
+	cylinder(h = 9, r = hole_diameter/2);
+	translate([0, holder_depth/2,(3/4)*height_diff_1 + notch_height])
+	rotate([0, 90, 0])
+	cylinder(h = 9, r = hole_diameter/2);
+}
+}

etching/cad_etching_bath/v2.0/pcb_holder_holder_r.scad

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+/////////////////////////////////////////////////////////////////////////////////
+// Adapter for drilling machine in the embedded lab.
+//
+// Author:              Maximilian Stiefel
+// Last modification:   10.06.2017
+/////////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////////
+// Vars
+/////////////////////////////////////////////////////////////////////////////////
+// Dimesions holder
+holder_height = 160;
+holder_width = 15;
+holder_depth = 5;
+
+// Dimensions notch
+notch_height = 135;
+notch_width = 2;
+notch_depth = 3;
+
+// General allowance
+allowance = 0.5;
+
+// Dimensions crossbar
+crossbar_height = 5 + allowance;
+crossbar_width = 5 + allowance;
+
+// Dimensions lid
+lid_thickness = 3;
+lid_slot_width = 8;
+
+// Dimensions neck
+neck_width = lid_slot_width - allowance;
+neck_depth = holder_depth;
+neck_height = lid_thickness + allowance;
+
+// Dimensions head 
+head_width = holder_width;
+head_depth = holder_depth;
+head_height = 5;
+
+// Suitable for M3 screw thread
+hole_diameter = 2.5;
+
+// Height difference between notch for PCB and the actual holder
+height_diff_1 = holder_height - notch_height;
+
+// Width difference between crossbar and holder
+width_diff_1 = holder_width - crossbar_width;
+
+// Width difference between holder and neck
+width_diff_2 = holder_width - neck_width;
+
+/////////////////////////////////////////////////////////////////////////////////
+// Action
+/////////////////////////////////////////////////////////////////////////////////
+difference()
+{
+union()
+{
+	// Cube for the base holder
+	cube([holder_width, holder_depth, holder_height], center = false);
+	// Head
+	translate([0, 0, holder_height + neck_height])
+	cube([head_width, head_depth, head_height]);
+	// Neck
+	translate([width_diff_2/2, 0, holder_height])
+	cube([neck_width, neck_depth, neck_height]);
+}
+
+union()
+{
+	// Cube for notch
+	translate([holder_width/2 - notch_width/2, -1, height_diff_1/2])
+	cube([notch_width, notch_depth, notch_height], center = false);
+
+	// Slots for crossbars
+	translate([width_diff_1/2, -1, (1/4)*height_diff_1 - crossbar_height/2])
+	cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
+	translate([width_diff_1/2, -1, (3/4)*height_diff_1 + notch_height - crossbar_height/2])
+	cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
+
+	// Drill holes for screws
+	translate([holder_width/2, holder_depth/2, (1/4)*height_diff_1])
+	rotate([0, 90, 0])
+	cylinder(h = 9, r = hole_diameter/2);
+	translate([holder_width/2, holder_depth/2,(3/4)*height_diff_1 + notch_height])
+	rotate([0, 90, 0])
+	cylinder(h = 9, r = hole_diameter/2);
+}
+}

etching/cad_etching_bath/v2.0/pcb_holder_lid.scad

@@ -0,0 +1,74 @@
+/////////////////////////////////////////////////////////////////////////////////
+// Adapter for drilling machine in the embedded lab.
+//
+// Author:              Maximilian Stiefel
+// Last modification:   10.06.2017
+/////////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////////
+// Vars
+/////////////////////////////////////////////////////////////////////////////////
+// Allowance
+allowance1 = 0.5;
+allowance2 = 1;
+
+// Dimensions cuvette
+glass_thickness = 6;
+cuvette_width = 180 + 2*glass_thickness + allowance2;
+cuvette_depth = 50 + 2*glass_thickness + allowance2;
+
+// Dimensions lid
+lid_thickness = 3;
+lid_width = 180 + 2*glass_thickness + 2*lid_thickness;
+lid_depth = 50 + 2*glass_thickness + 2*lid_thickness;
+lid_height = 20;
+
+// Dimensions holder heater
+heater_diameter = 30; 
+heater_offset = 40;
+heater_pos = -lid_width/2 + heater_diameter/2 + 2*lid_thickness + 3;
+
+// Dimensions slot for the PCB holder arms
+slot_width = lid_width - heater_diameter - 2*lid_thickness - 20;
+slot_depth = 8;
+slot_height = 1.5 * lid_height;
+slot_pos = heater_pos + heater_diameter/2 + lid_thickness + 3;  
+
+// Dimensions service holes for temp. sensor and air tube
+service_hole_width = 10;
+service_hole_depth = 10;
+service_hole_height = lid_height;
+
+/////////////////////////////////////////////////////////////////////////////////
+// Action
+/////////////////////////////////////////////////////////////////////////////////
+difference()
+{
+	union()
+	{
+		// Basic lid
+		translate([0, 0, lid_height/2])
+		cube([lid_width, lid_depth, lid_height], center = true);
+		translate([heater_pos, 0, lid_height - 1])
+		cylinder(h = heater_offset + 1, r = heater_diameter/2 + lid_thickness);
+	}
+	union()
+	{
+		// Depening to put it over the cuvette
+		translate([0, 0, (3/8)*lid_height - 1])
+		cube([cuvette_width, cuvette_depth, (3/4)*lid_height], center = true);
+		// Hole for heater
+		translate([heater_pos, 0, -1])
+		cylinder(h = heater_offset + lid_height + 2, r = heater_diameter/2);
+		// Slot for the PCB holder arms
+		translate([slot_pos, -slot_depth/2, 0])
+		cube([slot_width, slot_depth, slot_height], center = false);
+		
+		// Service holes
+		translate([-lid_width/2 + lid_thickness + 5, -lid_depth/2 + lid_thickness + 1, (1/2)*lid_height])
+		cube([service_hole_width, service_hole_depth, service_hole_height]);
+		translate([lid_width/2 - lid_thickness - service_hole_width -5, -lid_depth/2 + lid_thickness + 1, (1/2)*lid_height])
+		cube([service_hole_width, service_hole_depth, service_hole_height]);
+
+	}
+}