Updates

2025-06-30 17:14:30 +02:00
parent b6c7d680e6
commit e66309cbf2
140 changed files with 2 additions and 0 deletions
--- a/tir_sportif/dioptre-pédagogique/scad/knob.scad
+++ b/tir_sportif/dioptre-pédagogique/scad/knob.scad
@@ -0,0 +1,66 @@
+//knob parameters
+KNOB_HEIGHT=10;
+KNOB_DIAM=30;
+
+//screw parameters
+SCREWHEAD_FACETOFACE=11;
+SCREWHEAD_DEPTH=8;
+THRU_HOLE_DIAM=0;
+
+//grippy cutouts parameters
+NUM_GRIP_CUTOUTS=16;
+GRIP_CUTOUT_DIAM=4;
+CUTOUT_RADIUS_ADJ=1;
+
+module FaceToFaceHex(width,height){
+    cube([width/sqrt(3),width,height],center = true,$fn=64);
+    rotate([0,0,120])cube([width/sqrt(3),width,height],center = true);
+    rotate([0,0,240])cube([width/sqrt(3),width,height],center = true);
+
+}
+// a=angle, r=radius of rotation
+module rotate_on_circle(angle, radius) {
+    dx=radius*sin(angle);
+    dy=radius*cos(angle);
+    translate([dx,dy,0])
+    children();   
+}
+
+difference(){
+    //Knob
+    union(){
+        translate([0, 0, -(((KNOB_HEIGHT-SCREWHEAD_DEPTH)/2)+0.01)]) 
+        cylinder(r=KNOB_DIAM/2, h=KNOB_HEIGHT, center=true,$fn=64);
+        translate([0, 0, -(((KNOB_HEIGHT-SCREWHEAD_DEPTH+KNOB_HEIGHT)/2))]) {
+        * cylinder(r=KNOB_DIAM/4, h=KNOB_HEIGHT/2, center=true,$fn=64);
+        }
+    };
+
+    //screw
+    union(){
+        //screwHead
+        FaceToFaceHex(SCREWHEAD_FACETOFACE,SCREWHEAD_DEPTH);
+        //screwHole
+        translate([0, 0, -(((KNOB_HEIGHT+SCREWHEAD_DEPTH)/2)+0.001)]) 
+        cylinder(r=THRU_HOLE_DIAM/2, h=KNOB_HEIGHT+KNOB_HEIGHT/2+0.001, center=true,$fn=64);
+    };
+
+    //grippyCutouts
+    for(i=[1:NUM_GRIP_CUTOUTS]){
+        rot_angle=(360/NUM_GRIP_CUTOUTS)*i;
+        translate([0,0,-(((KNOB_HEIGHT-SCREWHEAD_DEPTH)/2)+0.01)])
+        rotate_on_circle(rot_angle,(KNOB_DIAM/2)+CUTOUT_RADIUS_ADJ)
+        cylinder(r=GRIP_CUTOUT_DIAM/2,h=KNOB_HEIGHT+0.01,center=true,$fn=64);
+    };
+        
+    //top filet
+    translate([0, 0,-(((KNOB_HEIGHT-SCREWHEAD_DEPTH)/2)-0.1)])
+    rotate_extrude()
+        polygon(points = [[KNOB_DIAM,KNOB_HEIGHT], [0,KNOB_HEIGHT+2],[0,KNOB_HEIGHT],[KNOB_DIAM/1.29,0]],$fn=100);
+    //down filet
+    color("pink") {
+        translate([0, 0,-(((KNOB_HEIGHT-SCREWHEAD_DEPTH)/2)+0.1)])
+        rotate_extrude()
+        polygon(points = [[-KNOB_DIAM,-KNOB_HEIGHT], [0,-KNOB_HEIGHT-2],[0,-KNOB_HEIGHT],[-KNOB_DIAM/1.29,0]],$fn=100);
+    }
+}