add toy model of the backplane

backplane_pcb - only the pcb, later with holes
backplane_populated - pcb and connectors

1 files changed, 19 insertions, 2 deletions

diff --git a/parameters.scad b/parameters.scad
index a1f1b2e..6fad0e7 100644
--- a/parameters.scad
+++ b/parameters.scad
@@ -1,6 +1,6 @@
 // size of the array
 num_hdd_x = 4;
-num_hdd_y = 3;
+num_hdd_y = 5;
 
 // space above hdd available for air flow
 cooling_height = 10;
@@ -11,12 +11,29 @@ bar_thickness = 10;
 // length hdd is standing out to be grabbed
 hdd_standout = 25;
 
+// dimensions of the backplane PCB
+backplane_width  = 70;
+backplane_height = 30;
+backplane_thickness = 1.6;
+
+// offsets of the backplane relative to the hdd
+backplane_hoffset = -(bar_thickness - 2);
+backplane_voffset = -(bar_thickness - 2);
+
+// display only: dimensions and offsets of the SATA connector relative
+// to the backplane
+backplane_con_width = 45;
+backplane_con_height = 5;
+backplane_con_depth = 10;
+backplane_con_hoffset = 5 - backplane_hoffset;
+backplane_con_voffset = 15;
+
 // outer diameter of thread rod and nut used for support
 rod_diameter = 4;
 nut_diameter = 6;
 nut_height = 3;
 
-// dimensions of HDDs; not model-specific; current values are fake
+// dimensions of HDDs; not model-specific
 hdd_width = 101.6;
 hdd_height = 25.4;
 hdd_length = 146;