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Rewrote phillips_driver() to an actual spec.

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Revar Desmera 2020-01-27 04:09:06 -08:00
parent bba54d2315
commit f740051ad1
2 changed files with 35 additions and 35 deletions
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68
phillips_drive.scad
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@ -15,7 +15,7 @@
// Module: phillips_drive()
// Description: Creates a model of a phillips driver bit of a given named size.
// Arguments:
// size = The size of the bit. "#1", "#2", or "#3"
// size = The size of the bit as a string. "#0", "#1", "#2", "#3", or "#4"
// shaft = The diameter of the drive bit's shaft.
// l = The length of the drive bit.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
@ -27,44 +27,44 @@
// phillips_drive(size="#2", shaft=6, l=20);
// phillips_drive(size="#3", shaft=6, l=20);
// }
module phillips_drive(size="#2", shaft=6, l=20, anchor=BOTTOM, spin=0, orient=UP) {
// These are my best guess reverse-engineered measurements of
// the tip diameters of various phillips screwdriver sizes.
ang = 11;
rads = [["#1", 1.25], ["#2", 1.77], ["#3", 2.65]];
radidx = search([size], rads)[0];
r = radidx == []? 0 : rads[radidx][1];
h = (r/2)/tan(ang);
cr = r/2;
orient_and_anchor([shaft, shaft, l], orient, anchor, chain=true) {
module phillips_drive(size="#2", shaft=6, l=20, $fn=36, anchor=BOTTOM, spin=0, orient=UP) {
assert(is_string(size));
assert(in_list(size,["#0","#1","#2","#3","#4"]));
num = ord(size[1]) - ord("0");
b = [0.61, 0.97, 1.47, 2.41, 3.48][num];
e = [0.31, 0.43, 0.81, 2.00, 2.41][num];
g = [0.81, 1.27, 2.29, 3.81, 5.08][num];
//f = [0.33, 0.53, 0.70, 0.82, 1.23][num];
//r = [0.30, 0.50, 0.60, 0.80, 1.00][num];
alpha = [ 136, 138, 140, 146, 153][num];
beta = [7.00, 7.00, 5.75, 5.75, 7.00][num];
gamma = 92.0;
ang1 = 28.0;
ang2 = 26.5;
h1 = adj_ang_to_opp(g/2, ang1);
h2 = adj_ang_to_opp((shaft-g)/2, 90-ang2);
h3 = adj_ang_to_opp(b/2, ang1);
p0 = [0,0];
p1 = [e/2, adj_ang_to_opp(e/2, 90-alpha/2)];
p2 = p1 + [(shaft-e)/2, adj_ang_to_hyp((shaft-e)/2, 90-gamma/2)];
orient_and_anchor([shaft,shaft,l], anchor=anchor, spin=spin, orient=orient, geometry="cylinder", chain=true) {
down(l/2) {
difference() {
intersection() {
union() {
clip = (shaft-1.2*r)/2/tan(26.5);
zrot(360/8/2) cylinder(h=clip, d1=1.2*r/cos(360/8/2), d2=shaft/cos(360/8/2), center=false, $fn=8);
up(clip-0.01) cylinder(h=l-clip, d=shaft, center=false, $fn=24);
union() {
cyl(d1=0, d2=g, h=h1, anchor=BOT);
up(h1) {
cyl(d1=g, d2=shaft, h=h2, anchor=BOT);
up(h2) cyl(d=shaft, h=l-h1-h2, anchor=BOT);
}
cylinder(d=shaft, h=l, center=false, $fn=24);
}
zrot(45)
zrot_copies(n=4) {
yrot(ang) {
zrot(-45) {
off = (r/2-cr*(sqrt(2)-1))/sqrt(2);
translate([off, off, 0]) {
linear_extrude(height=l, convexity=4) {
difference() {
union() {
square([shaft/2, shaft/2], center=false);
mirror_copy([1,-1]) back(cr) zrot(1.125) square([shaft/2, shaft/2], center=false);
}
difference() {
square([cr*2, cr*2], center=true);
translate([cr,cr,0]) circle(r=cr, $fn=8);
}
}
}
zrot_copies(n=4, r=b/2/cos(90-alpha/2), sa=90) {
up(h3) {
xrot(-beta) {
linear_extrude(height=(h1+h2)*20, convexity=4, center=true) {
path = [p0, p1, p2, [-p2.x,p2.y], [-p1.x,p1.y]];
polygon(path);
}
}
}

2
version.scad
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@ -8,7 +8,7 @@
//////////////////////////////////////////////////////////////////////
BOSL_VERSION = [2,0,96];
BOSL_VERSION = [2,0,97];
// Section: BOSL Library Version Functions