5 //tongue_w = 11.92 + 0.4;
9 usb_tongue_d = 8.97 - 0.2;
10 usb_tongue_w_slop = +0.5;
11 usb_wall_h = 4.54 - 2.04;
14 side_wall_th = 1.5; // XXXX rename wall_th
16 board_l = 17.56 + 0.2;
17 board_w = 19.14 + 0.2;
18 board_th = 1.92 + 0.1;
20 sw_to_edge = board_w/2 + 0.1;
25 wall_y_min = -board_l - side_wall_th; // XXXX remove
26 ceil_y_min = wall_y_min - 5;;
29 [ [0, 0], [-sw_to_edge, -1.0] ],
30 [ [sw_to_edge-4.5, -4.5], [sw_to_edge, -5.7] ],
31 // [ [3.0, -11.72], [sw_to_edge, -13.38] ],
32 [ [-sw_to_edge+3.85, -14.90], [sw_to_edge, -13.38] ],
34 chip_cutout = [[ -sw_to_edge + 4.20, -3.75 ],
35 [ -sw_to_edge + 11.95, -11.90 ]];
39 strain_pitch_across = 5;
40 strain_pitch_along = 10;
44 cover_strap_c_d_y = 5.5; // from front of board
45 cover_registration_sz_y = 2;
46 cover_registration_sz_z = 3;
50 bottom_floor_th = 1.5;
62 top_top_z = usb_wall_h;
63 top_base_z = -board_th;
64 bottom_base_z = top_base_z - cable_space_z - bottom_floor_th;;
66 front_y_max = front_wall_th;
67 main_y_min = -board_l - side_wall_th;
69 strain_0_y_c = main_y_min - strain_w/2;
70 strain_1_y_c = strain_0_y_c - strain_pitch_along;
71 total_y_min = strain_1_y_c - strain_w/2 - side_wall_th;
73 bottom_wall_top_z = (top_top_z + top_base_z) * 0.5 - fit_gap_z/2;
74 cover_wall_bot_z = (top_top_z + top_base_z) * 0.5 + fit_gap_z/2;
75 cover_top_z = top_top_z + cover_ceil_th;
77 top_side_wall_x = +board_w/2 + side_wall_th;
78 total_side_wall_x = top_side_wall_x + side_wall_th + side_x_gap;
80 cover_registration_c_dy = -cover_strap_c_d_y - strap_w/2
81 - side_wall_th - cover_registration_sz_y/2;
90 module FrontWallsPlan(slop) {
92 rectfromto([ -board_w/2 - side_wall_th, 0 ],
93 [ -usb_w/2 - slop, front_wall_th ]);
96 module TopSmallWallsPlan() {
99 rectfromto([ -usb_w/2, -0.01 ],
100 [ -usb_w/2 + usb_wall_w, usb_tongue_d ]);
104 for (w=small_walls) {
105 rectfromto(w[0], w[1]);
108 module TopCeilPlan() {
111 rectfromto([ -usb_w/2, -0.01 ],
112 [ 0.1, usb_tongue_d ]);
113 rectfromto([ -board_w/2 - side_wall_th, 0 ],
114 [ 0.1, ceil_y_min ]);
116 rectfromto(chip_cutout[0], chip_cutout[1]);
119 module TopMainWallsPlan() {
121 rectfromto([ -board_w/2 - side_wall_th, 0 ],
122 [ -board_w/2, wall_y_min ]);
124 FrontWallsPlan(usb_tongue_w_slop);
125 rectfromto([ -board_w/2 - side_wall_th + 0, - board_l ],
126 [ +board_w/2 + side_wall_th, total_y_min ]);
129 module CoverRegistrations(){
130 linextr_y_xz(cover_registration_c_dy - strap_w/2,
131 cover_registration_c_dy + strap_w/2) {
133 rectfromto([ -total_side_wall_x,
134 cover_wall_bot_z - cover_registration_sz_z ],
135 [ +total_side_wall_x, cover_top_z ]);
137 TopElevationForCutout();
138 translate([0, -20]) TopElevationForCutout();
144 module Top(){ ////toplevel
147 linextr(0, usb_wall_h)
149 linextr(usb_wall_h - usb_ceil_th, usb_wall_h)
151 linextr(-board_th, usb_wall_h)
154 linextr(cover_wall_bot_z, top_top_z)
155 rectfromto([ -(board_w/2 + 0.1), total_y_min ],
156 [ -total_side_wall_x, main_y_min - fit_gap_y ]);
159 for (y_c = [strain_0_y_c, strain_1_y_c]) {
160 for (x_c = [-1,+1] * strain_pitch_across/2) {
161 translate([x_c, y_c, 0])
163 square([ strain_t, strain_w ], center=true);
166 linextr_y_xz(total_y_min-1, main_y_min)
167 translate([0, top_base_z])
168 scale([1, strain_groove_d/strain_groove_w])
169 circle(strain_groove_w/2, $fn = 8);
173 module TopElevationForCutout(){
174 rectfromto([ -(top_side_wall_x + side_x_gap), top_base_z ],
175 [ +(top_side_wall_x + side_x_gap), top_top_z ]);
177 module BottomMainElevation(){
179 rectfromto([ -total_side_wall_x, bottom_base_z ],
180 [ +total_side_wall_x, bottom_wall_top_z ]);
182 TopElevationForCutout();
185 module Bottom(){ ////toplevel
188 linextr_y_xz(total_y_min, front_y_max)
189 BottomMainElevation();
192 linextr_y_xz(total_y_min + side_wall_th,
193 front_y_max - side_wall_th)
194 rectfromto([ -board_w/2, bottom_base_z + bottom_floor_th ],
197 linextr_y_xz(total_y_min - 1,
198 total_y_min + side_wall_th + 1){
199 translate([ 0, top_base_z ]){
201 translate([ 0, -cable_dia/2 ])
202 circle(r = cable_dia/2, $fa = 10, $fs = 1);
203 square([ cable_dia, 0.1 ], center=true);
208 CoverRegistrations();
209 cube([ 1, fit_gap_y*2, fit_gap_z*2 ], center=true);
214 module CoverMainElevation(){
216 rectfromto([ -total_side_wall_x, cover_wall_bot_z ],
217 [ +total_side_wall_x, cover_top_z ]);
219 TopElevationForCutout();
222 module Cover(){ ////toplevel
223 linextr_y_xz(main_y_min, front_y_max)
224 CoverMainElevation();
225 CoverRegistrations();
228 module BottomDemo(){ ////toplevel
229 translate([0, 0, -0.25]) Bottom();
231 translate([0, 0, +0.25]) Cover();