77 lines
2.7 KiB
OpenSCAD
77 lines
2.7 KiB
OpenSCAD
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//OpenSCAD representation of small gauge film formats
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//Website: https://git.sixteenmillimeter.com/16mm/filmless.git
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module rounded_cube (cube_arr = [1, 1, 1], d = 0, center = false) {
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off_x = 0;
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off_y = 0;
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r = d/2;
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union () {
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cube([cube_arr[0] - d, cube_arr[1], cube_arr[2]], center = center);
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cube([cube_arr[0], cube_arr[1] - d, cube_arr[2]], center = center);
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translate ([1 * (cube_arr[0] / 2) - r , 1 * (cube_arr[1] / 2)- r, 0]) cylinder(r = r, h = cube_arr[2], center = center);
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translate ([-1 * (cube_arr[0] / 2) + r, -1 * (cube_arr[1] / 2) + r, 0]) cylinder(r = r, h = cube_arr[2], center = center);
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translate ([1 * (cube_arr[0] / 2) - r, -1 * (cube_arr[1] / 2) + r, 0]) cylinder(r = r, h = cube_arr[2], center = center);
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translate ([-1 * (cube_arr[0] / 2) + r, 1 * (cube_arr[1] / 2)- r, 0]) cylinder(r = r, h = cube_arr[2], center = center);
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}
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}
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module 16mm_perf () {
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$fn = 10;
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PERF_W = 1.829;
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PERF_H = 1.27;
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rounded_cube([PERF_W, PERF_H, 2], d = .5, center = true);
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}
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module 16mm_film (frames = 10, double = false, long = true) {
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THICKNESS = 0.0047 * 25.4;
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WIDTH = 16;
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SPACING_LONG = 7.62; //long pitch (projection)
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SPACING_SHORT = 7.605; //short pitch
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PERF_OFFSET = (1.829 / 2) + .85;
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difference () {
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if (long) {
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cube([WIDTH, SPACING_LONG * frames, THICKNESS], center = true);
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} else {
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cube([WIDTH, SPACING_SHORT * frames, THICKNESS], center = true);
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}
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if (long) {
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OFFSET = (SPACING_LONG * frames) / 2;
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for (i = [0 : frames]) {
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translate([8 - PERF_OFFSET, -OFFSET + SPACING_LONG * i, 0]) 16mm_perf();
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}
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if (double) {
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for (i = [0 : frames]) {
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translate([-8 + PERF_OFFSET, -OFFSET + SPACING_LONG * i, 0]) 16mm_perf();
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}
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}
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} else {
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OFFSET = (SPACING_SHORT * frames) / 2;
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for (i = [0 : frames]) {
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translate([8 - PERF_OFFSET, -OFFSET + SPACING_LONG * i, 0]) 16mm_perf();
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}
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if (double) {
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for (i = [0 : frames]) {
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translate([-8 + PERF_OFFSET, -OFFSET + SPACING_LONG * i, 0]) 16mm_perf();
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}
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}
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}
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}
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}
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module film_sheet () {
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STRIPS = 12;
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FRAMES = 33;
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PERFS = "single";
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PITCH = "long";
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projection() for (i = [0:STRIPS - 1]) {
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translate([16.01 * i, 0, 0]) {
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16mm_film(FRAMES, PERFS == "double", PITCH == "long");
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}
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}
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echo("STRIP LENGTH", (PITCH == "long" ? 7.62 : 7.605) * FRAMES, "mm");
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echo("PAGE WIDTH", 16 * STRIPS, "mm");
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echo("PITCH", PITCH);
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echo("PERFS", PERFS);
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}
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//film_sheet();
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