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own cad design

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Hendrik Langer 6 years ago
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1 changed files with 29 additions and 185 deletions
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  1. 214
      cad/case.scad

214
cad/case.scad
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@ -1,204 +1,48 @@
//Pi Zero parametric box design with camera support
//R.J.Tidey 17th May 2016
// General parameters
//build 1=base, 2=lid, 3=both
build = 3;
//camera 0=none, 1=internal, 2=external
camera = 2;
//GPIO 0=no cut_out, 1=top cut_out, 2 side cut out
gpio = 1;
wall = 2.0; wall = 2.0;
hdmi_recess = 1; tolerance = 0.4;
corner = 3.0;
tol = 0.3;
$fn=50;
//Base parameters
//inner dimensions
base_width = 30;
//65 for original pizero with no camera connector
//67 for pizero with camera connector
//70 to give more radius for bending cable back internally
base_length = camera==1 ? 70.0 : 67.0;
hole2hole_l = 58;
hole2hole_w = 23;
hdmi_recess_w = 17.5;
hdmi_recess_h = 3.75;
support_offset = 3.5; width=65.0+6;
support_height = 1.0; length=30.0+32.0;
support_radius = 1.4; height=14.0;
support_size = 7.0;
usbpower_offset = 54.0;
usbusb_offset = 41.4;
usb_length = 9.25;
hdmi_offset = 12.4;
hdmi_length = 13.75;
cutout_height_offset = 1.0;
sd_offset = 16.7;
sd_width = 13.0;
//Lid parameters $fn=50;
//1.5 for no camera shallow
//6 for camera
lid_height = camera==1 ? 6.0 : 1.5;
board_thick = 1.35;
connector_thick = 3.2;
screw_depth = 8.0;
screw_radius = 1.3;
gpio_centre_x = 32.5;
gpio_centre_y = 3.5;
gpio_length = 51.5;
gpio_width = 6;
gpio_recess_h = 1.2;
corner_size = 2.4;
//Camera parameters,
camera_hole = 10;
camera_x = 20.0;
camera_screw_centre_offset = 0.0;
camera_screw_x = 12.5;
camera_screw_y = 21.0;
camera_screw_r = 1.5;
camera_cable_y = 20.0;
camera_cable_h = 1.0;
//calculate required base_height
base_height = support_height + board_thick + connector_thick + tol;
echo("base_height = ",base_height);
echo("base_length = ",base_length);
echo("lid_height = ",lid_height);
module round_cube(start,length,width,height,z_offset,cor) { holes_x=58.0;
hull() { holes_y=23.0;
translate([start,start,z_offset])
cylinder(height+wall,r=cor);
translate([start+length,start,z_offset])
cylinder(height+wall,r=cor);
translate([start+length,start+width,z_offset])
cylinder(height+wall,r=cor);
translate([start,start+width,z_offset])
cylinder(height+wall,r=cor);
}
}
module screwhole() { hdmi_y_space = 33.0;
cylinder(wall+support_height+tol,r=support_radius);
cylinder(wall*0.75,2*support_radius,support_radius);
}
module corner_support() { module base(x, y, z, thick) {
translate([0,0,-thick])
difference() { difference() {
union() { minkowski() {
round_cube(corner-2*tol,corner_size,corner_size,lid_height,0,corner); cube([x,y,z]);
translate([support_offset,support_offset,wall-0.1]) cylinder(r=wall,h=0.1);
cylinder(lid_height+connector_thick+0.1,4,3); }
translate([thick,thick,thick]) minkowski() {
cube([x-2*thick,y-2*thick,z]);
cylinder(r=thick,h=0.1);
} }
translate([support_offset,support_offset,wall+lid_height+connector_thick-screw_depth])
cylinder(screw_depth+1,r=screw_radius);
}
}
module cut_outs(height) {
translate([tol+hdmi_offset-0.5*hdmi_length,-wall-0.1,height])
cube([hdmi_length, wall+ 1.0,base_height]);
translate([tol+usbusb_offset-0.5*usb_length,-wall-0.1,height])
cube([usb_length, wall+ 1.0,base_height]);
translate([tol+usbpower_offset-0.5*usb_length,-wall-0.1,height])
cube([usb_length, wall+ 1.0,base_height]);
translate([-wall-0.1,tol+sd_offset-0.5*sd_width,height])
cube([wall+ 1.0,sd_width,base_height]);
if(hdmi_recess==1) {
translate([tol+hdmi_offset-0.5*hdmi_recess_w,-wall-0.1,wall])
cube([hdmi_recess_w, wall+ 0.1,base_height]);
}
if(camera==2) {
translate([base_length - 2* wall,tol+0.5*(base_width-camera_cable_y),height])
cube([4*wall,camera_cable_y,camera_cable_h]);
}
if(gpio==2) {
translate([tol + gpio_centre_x - gpio_length*0.5,tol+base_width-wall,height])
cube([gpio_length,4*wall,base_height]);
} }
} }
module base_shell() { module holes(r, h) {
difference() { translate([0,0,0]) cylinder(r=r,h=h);
round_cube(corner-wall,base_length+2*tol+2*wall-2*corner,base_width+2*tol+2*wall-2*corner,base_height,0,corner); translate([holes_x,0,0]) cylinder(r=r,h=h);
round_cube(corner-tol,base_length+4*tol-2*corner,base_width+4*tol-2*corner,base_height,wall,corner); translate([0,holes_y,0]) cylinder(r=r,h=h);
} translate([holes_x,holes_y,0]) cylinder(r=r,h=h);
translate([-tol,-tol,0])
cube([support_size,support_size,support_height+wall]);
translate([hole2hole_l+tol,-tol,0])
cube([support_size,support_size,support_height+wall]);
translate([hole2hole_l+tol,hole2hole_w+tol,0])
cube([support_size,support_size+2*tol,support_height+wall]);
translate([-tol,hole2hole_w+tol,0])
cube([support_size,support_size+2*tol,support_height+wall]);
}
module base() {
difference() {
base_shell();
translate([tol+support_offset,tol+support_offset,-0.1]) screwhole();
translate([tol+support_offset+hole2hole_l,tol+support_offset,-0.1]) screwhole();
translate([tol+support_offset+hole2hole_l,tol+support_offset+hole2hole_w,-0.1]) screwhole();
translate([tol+support_offset,tol+support_offset+hole2hole_w,-0.1]) screwhole();
cut_outs(wall+support_height+board_thick-tol);
}
} }
module lid_shell() { translate([-(width-holes_x)/2,-hdmi_y_space,0]) base(width, length, height, wall);
difference() { holes(3.5, 1.0);
round_cube(corner-wall,base_length+2*tol+2*wall-2*corner,base_width+2*tol+2*wall-2*corner,lid_height,0,corner); holes(2.0/2, height);
round_cube(corner-tol,base_length+4*tol-2*corner,base_width+4*tol-2*corner,lid_height,wall,corner);
if(gpio==1) {
translate([tol+gpio_centre_x-0.5*gpio_length,tol+gpio_centre_y-0.5*gpio_width,-0.5])
cube([gpio_length,gpio_width,wall+1.0]);
}
if(camera==1) {
translate([tol+camera_x,tol+0.5*(base_width-camera_hole),-0.5])
cube([camera_hole,camera_hole,wall+1.0]);
translate([tol+camera_x+0.5*camera_hole+camera_screw_centre_offset,tol+0.5*base_width,-0.5]){
translate([0,-0.5*camera_screw_y,0]) cylinder(wall+1.0,camera_screw_r,camera_screw_r);
translate([0,0.5*camera_screw_y,0]) cylinder(wall+1.0,camera_screw_r,camera_screw_r);
translate([-camera_screw_x,-0.5*camera_screw_y,0]) cylinder(wall+1.0,camera_screw_r,camera_screw_r);
translate([-camera_screw_x,0.5*camera_screw_y,0]) cylinder(wall+1.0,camera_screw_r,camera_screw_r);
}
}
}
}
module lid() { #translate([12.4-3.5,-hdmi_y_space-1+(12/2),(13/2)-1.2]) {
difference() { cube([22,12,13], center=true);
union() { translate([0,-2*wall,0]) cube([17.5,12,9], center=true);
lid_shell();
translate([0,0,0]) corner_support();
translate([hole2hole_l,0,0]) corner_support();
translate([hole2hole_l,hole2hole_w,0]) corner_support();
translate([0,hole2hole_w,0]) corner_support();
}
if(hdmi_recess==1) {
translate([tol+hdmi_offset-0.5*hdmi_recess_w,base_width+tol+0.1,lid_height+wall-hdmi_recess_h])
cube([hdmi_recess_w, 2*wall,hdmi_recess_h+1]);
}
if(gpio==2) {
translate([tol + gpio_centre_x - gpio_length*0.5,-wall,lid_height+wall-gpio_recess_h])
cube([gpio_length,4*wall,gpio_recess_h+1]);
}
}
} }
if (build == 1 || build == 3) { #translate([41.4-3.5,-30,4]) rotate([90,0,0]) cylinder(r=3.0/2,h=10);
base();
}
if (build == 3) {
translate([0,base_width+4*wall,0]) lid();
}
if(build == 2){
lid();
}
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