Uit Hack42
(+update) |
(+adjWheel.scad) |
||
| Regel 46: | Regel 46: | ||
</pre> | </pre> | ||
|} | |} | ||
| + | |||
| + | ==adjWheel.scad== | ||
| + | {| | ||
| + | |[[Bestand:AdjWheel.png|thumb|left|An example of adjWheel(7,3)]] | ||
| + | |- | ||
| + | |<pre> | ||
| + | module adjWheel(radius, width) { | ||
| + | circ = 2*radius*3.14159; | ||
| + | notch = (circ/40)*0.95; | ||
| + | edge = (circ-(notch*20))/400; | ||
| + | union() { | ||
| + | difference() { | ||
| + | cylinder(h=width,r=radius,$fs=0.01); | ||
| + | //notches | ||
| + | for ( i = [0:19] ) { | ||
| + | rotate( i * 360 / 20, [0,0,1]) | ||
| + | translate([radius,0,0]) | ||
| + | cylinder(h=width+0.01,r=notch,$fs=0.01); | ||
| + | } | ||
| + | } | ||
| + | //rounded edges | ||
| + | for ( i = [0:19] ) { | ||
| + | rotate( i * 360 / 20, [0,0,1]) | ||
| + | translate([radius-2*edge,notch+edge,0]) | ||
| + | cylinder(h=width,r=edge,$fs=0.01); | ||
| + | } | ||
| + | } | ||
| + | } | ||
| + | |||
| + | adjWheel(7,3); | ||
| + | </pre> | ||
| + | |} | ||
| + | |||
| + | ==notchRing.scad== | ||
| + | |||
| + | __FORCETOC__ | ||
Huidige versie van 9 sep 2011 om 06:40
ratchet.scad
module tooth(base, height, tipl, tiph, width) {
difference() {
intersection() {
translate([-(base+tipl)/2,0,0]) cube([base+tipl,height,width], center = false);
scale(v=[1,(height/(base+tipl))*2,0]) cylinder(r=(base+tipl)/2,h=width, $fs=0.01);
}
translate([-(base/2+tipl/2),0,0])
polyhedron( points = [ [0,0,0],[0,0,width],[0,tiph,0],[0,tiph,width],[tipl,0,0],[tipl,0,width] ],
triangles = [ [1,3,5],[0,4,2],[0,2,1],[2,3,1],[0,1,4],[4,1,5],[2,4,5],[2,5,3] ]);
}
}
//tooth2(7,7,5,5,1);
module ratchet(diam, nrteeth, height, tipl, tiph, width) {
//moves teeth down by this distance
down = 0.01 + (diam - diam * cos(180/nrteeth));
//make sure tooth's height is not lower than down movement
if (height <= down) {
ratchet2(diam, nrteeth, down, tipl, tiph, width, down);
} else {
ratchet2(diam, nrteeth, height, tipl, tiph, width, down);
}
}
module ratchet2(diam, nrteeth, height, tipl, tiph, width, down) {
// calculate tooth's base
base = 2 * sin(180/nrteeth) * diam;
union() {
cylinder(h=width,r=diam);
//teeth
for ( i = [0 : (nrteeth-1)] ) {
rotate( i * 360 / nrteeth, [0, 0, 1])
translate([-(0.25*base), (diam-2*down), 0]) // check the .25
tooth(base, height, tipl, tiph, width);
}
}
}
ratchet(10,6,3,5,7,1);
|
adjWheel.scad
module adjWheel(radius, width) {
circ = 2*radius*3.14159;
notch = (circ/40)*0.95;
edge = (circ-(notch*20))/400;
union() {
difference() {
cylinder(h=width,r=radius,$fs=0.01);
//notches
for ( i = [0:19] ) {
rotate( i * 360 / 20, [0,0,1])
translate([radius,0,0])
cylinder(h=width+0.01,r=notch,$fs=0.01);
}
}
//rounded edges
for ( i = [0:19] ) {
rotate( i * 360 / 20, [0,0,1])
translate([radius-2*edge,notch+edge,0])
cylinder(h=width,r=edge,$fs=0.01);
}
}
}
adjWheel(7,3);
|
