git-sync/homeracker
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat(rackmount_ears): asymetry slider (#13)

Browse Source 
Added "insane" asymetry slider to create differently sized rackmount
ears.
This commit is contained in:
Patrick Pötz
2025-04-27 12:42:26 +02:00
committed by GitHub
parent 98e19efa60
commit ebeb258d60
1 changed files with 43 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
models/rackmount_ears/rackmount_ears.scad
View File

@@ -1,13 +1,26 @@
// import BOSL2
include <BOSL2/std.scad>
/* [Hidden] */
$fn=100;
CAGE_BOLT_DIAMETER=6.5;
RACK_BORE_DISTANCE_VERTICAL=15.875;
RACK_BORE_DISTANCE_TOP_BOTTOM=6.35;
RACK_MOUNT_SURFACE_WIDTH=15.875;
RACK_BORE_DISTANCE_HORIZONTAL=RACK_MOUNT_SURFACE_WIDTH/2;
RACK_HEIGHT_UNIT=44.5; // mm
RACK_WIDTH_10_INCH_INNER=222.25; // mm
RACK_WIDTH_10_INCH_OUTER=254; // mm
RACK_WIDTH_19_INCH=482.6; // mm
/* [Base] */
// automatically chooses the tightest fit for the rackmount ears based on the device width. If true, rack_size will be ignored.
autosize=true;
// rack size in inches. If autosize is true, this value will be ignored. Only 10 and 19 inch racks are supported.
rack_size=10; // [10:10 inch,19:19 inch]
// Asymetry Slider. If autosize is true, this value will be ignored. CAUTION: there's no sanity check for this slider!
asymetry=100; // [-150:0.1:150]
// Width of the device in mm. Will determine the width of the rackmount ears depending on rack_size.
device_width=201;
@@ -38,44 +51,18 @@ device_bore_rows=2;
// If true, the device will be aligned to the center of the rackmount ear. Otherwise it will be aligned to the bottom of the rackmount ear.
center_device_bore_alignment=false;
/* [CONSTANTS (shouldn't need to be changed)] */
CAGE_BOLT_DIAMETER=6.5;
/* [Derived] */
CHAMFER=min(strength/3,0.5);
RACK_BORE_DISTANCE_VERTICAL=15.875;
RACK_BORE_DISTANCE_TOP_BOTTOM=6.35;
RACK_MOUNT_SURFACE_WIDTH=15.875;
RACK_BORE_DISTANCE_HORIZONTAL=RACK_MOUNT_SURFACE_WIDTH/2;
RACK_BORE_WIDTH=RACK_MOUNT_SURFACE_WIDTH-2*max(strength,2);
RACK_HEIGHT_UNIT=44.5; // mm
RACK_HEIGHT_UNIT_COUNT=max(1,ceil(device_height/RACK_HEIGHT_UNIT));
RACK_HEIGHT=RACK_HEIGHT_UNIT_COUNT*RACK_HEIGHT_UNIT; // actual height calculated by height unit size x number of units
RACK_BORE_COUNT=RACK_HEIGHT_UNIT_COUNT*3; // 3 holes for each units
RACK_WIDTH_10_INCH_INNER=222.25; // mm
RACK_WIDTH_10_INCH_OUTER=254; // mm
RACK_WIDTH_19_INCH=482.6; // mm
// Base assertions
module validate_params() {
valid_rack_sizes=[10,19];
if(autosize == false){
assert(rack_size == 10 || rack_size == 19, "Invalid rack_size. Only 10 and 19 inch racks are supported. Choose a valid one or set autosize to true.");
}
}
validate_params();
// Debug
echo("Height: ", RACK_HEIGHT);
echo("Rack Bore Count: ", RACK_BORE_COUNT);
// Calculate the width of the ear
function get_ear_width(device_width) =
device_width > RACK_WIDTH_10_INCH_INNER || autosize == false && rack_size == 19 ?
(RACK_WIDTH_19_INCH - device_width) / 2 :
(RACK_WIDTH_10_INCH_OUTER - device_width) / 2
;
rack_ear_width = get_ear_width(device_width);
function get_bore_depth(device_bore_margin_horizontal,device_bore_columns) =
(device_bore_columns - 1) * device_bore_margin_horizontal
@@ -92,7 +79,7 @@ device_screw_alignment = [strength,depth/2,device_screw_alignment_vertical];
module base_ear(width,strength,height) {
union() {
// Front face
cuboid([rack_ear_width,strength,height],anchor=LEFT+BOTTOM+FRONT,chamfer=CHAMFER);
cuboid([width,strength,height],anchor=LEFT+BOTTOM+FRONT,chamfer=CHAMFER);
// Side face
cuboid([strength,depth,height],anchor=LEFT+BOTTOM+FRONT,chamfer=CHAMFER);
}
@@ -110,15 +97,33 @@ module screws_countersunk(length, diameter_head, length_head, diameter_shaft) {
// Assemble the rackmount ear
difference() {
module rackmount_ear(asym=0){
ear_width_19_inch=(RACK_WIDTH_19_INCH - device_width) / 2 + asym;
ear_width_10_inch=(RACK_WIDTH_10_INCH_OUTER - device_width) / 2 + asym;
// Calculate the width of the ear
rack_ear_width = device_width > RACK_WIDTH_10_INCH_INNER || autosize == false && rack_size == 19 ?
ear_width_19_inch:
ear_width_10_inch
;
difference() {
// Create the base of the ear
base_ear(device_width,strength,RACK_HEIGHT);
// Create the holes for the device screws
screws_countersunk(length=strength,diameter_head=device_bore_hole_head_diameter,length_head=device_bore_hole_head_length,diameter_shaft=device_bore_hole_diameter);
difference() {
// Create the base of the ear
base_ear(rack_ear_width,strength,RACK_HEIGHT);
// Create the holes for the device screws
screws_countersunk(length=strength,diameter_head=device_bore_hole_head_diameter,length_head=device_bore_hole_head_length,diameter_shaft=device_bore_hole_diameter);
}
// Create the holes for the rackmount screws
zcopies(spacing=RACK_HEIGHT_UNIT,n=RACK_HEIGHT_UNIT_COUNT,sp=[0,0,0])
zcopies(spacing=RACK_BORE_DISTANCE_VERTICAL,n=3,sp=[rack_ear_width-RACK_BORE_DISTANCE_HORIZONTAL,0,RACK_BORE_DISTANCE_TOP_BOTTOM])
cuboid([RACK_BORE_WIDTH,strength+1,CAGE_BOLT_DIAMETER], rounding=CAGE_BOLT_DIAMETER/2, edges=[TOP+LEFT,TOP+RIGHT,BOTTOM+LEFT,BOTTOM+RIGHT], anchor=FRONT);
}
// Create the holes for the rackmount screws
zcopies(spacing=RACK_HEIGHT_UNIT,n=RACK_HEIGHT_UNIT_COUNT,sp=[0,0,0])
zcopies(spacing=RACK_BORE_DISTANCE_VERTICAL,n=3,sp=[rack_ear_width-RACK_BORE_DISTANCE_HORIZONTAL,0,RACK_BORE_DISTANCE_TOP_BOTTOM])
cuboid([RACK_BORE_WIDTH,strength+1,CAGE_BOLT_DIAMETER], rounding=CAGE_BOLT_DIAMETER/2, edges=[TOP+LEFT,TOP+RIGHT,BOTTOM+LEFT,BOTTOM+RIGHT], anchor=FRONT);
}
// Place the ears
rackmount_ear(asymetry);
x_mirror_plane = [1,0,0];
translate([-device_width,0,0])
mirror(x_mirror_plane){
rackmount_ear(-asymetry);
}