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/// ARRAY SIZE
// size of the array
num_hdd_x = 4;
num_hdd_y = 5;
/// PRINTER SPECIFICATION
// assumed space deviation of the resulting form; used to leave space
// in holes so that screws and rods do not stuck
pla_epsilon = 0.05;
/// PRIMARY DIMENSIONS
// width of vertical and horizontal bars
vrail_width = 15;
hrail_height = 15;
// depth of front and back
front_depth = 15;
back_depth = 6;
// length hdd is standing out to be grabbed
hdd_standout = 15;
// dimensions of the L-shaped rail between front and back
rail_width = 21;
rail_height = rail_width;
rail_thickness = 2;
// width and height of the horizontal support bar (U-shaped metal)
support_bar_width = 10 + pla_epsilon;
// width of the SATA power cable (including some extra space for
// navigation)
spc_width=3;
/// HDD SIZE (from spec)
// dimensions of HDDs; not model-specific
hdd_width = 101.6 + pla_epsilon;
hdd_height = 25.4 + pla_epsilon;
hdd_length = 146;
/// OPENSCAD HACKS
$fn = 180;
// a length larger than any constructed feature; use to simulate
// infinitely long structures (for difference operations)
large = 1000;
// A small quantity that does not change the print results. Use to
// displace surfaces of CSG operations to prevent them from overlapping.
epsilon = 0.0001;
/// COMPUTED DIMENSIONS
tray_width = hdd_width + vrail_width/2;
tray_height = hdd_height + hrail_height;
connector_width = vrail_width - 2*(1 + rail_thickness);
/// COMMON FUNCTIONS
// they do not belong here but are not enough to warrant a seperate
// file. sorry
module ccube(x) cube(x, center=true);
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