CircularKnitic Parametric
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Goal: Replicate CircularKnitic's designs with OpenScad to allow for larger machines to be built
Code
CKvars.scad
needleWidth=1.8;
p2needlegrooveID=274.4;
p2needlegrooveDepth=2.8;
p2H=104;
p2W=4.8;
p2ID=270;
p2OD=p2ID+(p2W*2);
p2holeH=75;
p2holeD=2;
p2holeCSD=4.01726;
p2holeCSL=1.5;
p2number=12; //number of sections around circle
p2needles=5; //needles mounted on each p2
p3wiggle=0.1;
p3number=4;
p3baseH=3;
p3baseID=p2ID-20-(p3wiggle*2);
p3baseOD=p2OD+20+(p3wiggle*2);
p3ridgeW1=3;
p3ridgeW2=5;
p3ridgeH=5;
p3wallW=3;
p3wallchamfW=2;
p3wallchamfH=3;
p3wallHaboveholesc=5;
p3grooveH1=18;
p3grooveH2=73;
p3grooveW=2.2;
firstcenter=(((((360/p2number/p2needles/2)/360*(p2OD*PI))-(needleWidth/2))/((360/p2number/p2needles/2)/360*(p2OD*PI)))*(360/p2number/p2needles/2))/2;
p3wallH=p3wallHaboveholesc+p2holeH+p3baseH;
CKp2.scad
include <CKvars.scad>;
CKp2();
module CKp2(){
rez=360/p2number*2*2;
$fn=rez; //defines resolution of circles.
translate([p2OD/2,0,0]){
difference(){
cylinder(h=p2H,d=p2OD);
cylinder(h=p2H,d=p2ID);
translate([-p2OD/2,-p2OD/2,0]){
cube([p2OD,p2OD/2,p2H]);
}
rotate([0,0,-360/p2number]){
translate([-p2OD/2,0,0])
cube([p2OD,p2OD/2,p2H]);
}
for(i=[1:p2needles]){
rotate([0,0,(360/p2number/p2needles/2)-(360/p2number/p2needles*i)]){
translate([-p2OD/2-0.2,-needleWidth/2,0])
cube([p2needlegrooveDepth+0.2,needleWidth,p2H]);
}
}
rotate([0,0,-360/p2number/p2needles]){
translate([-p2OD/2-0.2,0,p2holeH])
rotate([0,90,0]){
union(){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
translate([0,0,((p2OD-p2ID)/2)-p2holeCSL]){
cylinder(h=p2holeCSL+2, d=p2holeCSD);
}
} //end union
}
}
rotate([0,0,-360/p2number/p2needles*(p2needles-1)]){
translate([-p2OD/2-0.2,0,p2holeH])
rotate([0,90,0]){
union(){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
translate([0,0,((p2OD-p2ID)/2)-p2holeCSL]){
cylinder(h=p2holeCSL+2, d=p2holeCSD);
}
} //end union
}
}
echo(((((360/p2number/p2needles/2)/360*(p2OD*PI))-(needleWidth/2))/((360/p2number/p2needles/2)/360*(p2OD*PI)))*(360/p2number/p2needles/2));
firstcenter=(((((360/p2number/p2needles/2)/360*(p2OD*PI))-(needleWidth/2))/((360/p2number/p2needles/2)/360*(p2OD*PI)))*(360/p2number/p2needles/2))/2;
rotate([0,0,-firstcenter]){
translate([-p2OD/2-0.2,0,p2holeH])
rotate([0,90,0]){
union(){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
translate([0,0,((p2OD-p2ID)/2)-p2holeCSL]){
cylinder(h=p2holeCSL+2, d=p2holeCSD);
}
} //end union
}
}
rotate([0,0,-360/p2number+firstcenter]){
translate([-p2OD/2-0.2,0,p2holeH])
rotate([0,90,0]){
union(){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
translate([0,0,((p2OD-p2ID)/2)-p2holeCSL]){
cylinder(h=p2holeCSL+2, d=p2holeCSD);
}
} //end union
}
}
}
}
} //end module
CKp3.scad
- need to add holes for screws/bolts
include <CKvars.scad>;
CKp3();
module CKp3(){
rez=360/p2number*2*2;
$fn=rez; //defines resolution of circles.
centerlineD=p2ID+(p2W+(p3wiggle*2));
echo(centerlineD);
translate([p3baseOD/2,0,0]){
difference(){
union(){
cylinder(h=p3baseH,d=p3baseOD);
difference(){
cylinder(h=p3ridgeH+p3baseH,d=centerlineD-((p2W+(p3wiggle*2)/2)));
translate([0,0,p3baseH])
cylinder(h=p3ridgeH,d1=centerlineD-(p3ridgeW2*2)-((p2W+(p3wiggle*2)/2)),d2=centerlineD-(p3ridgeW1*2)-((p2W+(p3wiggle*2)/2)));
}
difference(){
translate([0,0,p3baseH])
cylinder(h=p3wallchamfH,d1=centerlineD+((p3wallchamfW+p3wallW)*2)+((p2W+(p3wiggle*2)/2)),d2=centerlineD+(p3wallW*2)+((p2W+(p3wiggle*2)/2)));
cylinder(h=p3wallchamfH+p3baseH,d=centerlineD+((p2W+(p3wiggle*2)/2)));
}
difference(){
cylinder(h=p3wallH,d=centerlineD+(p3wallW*2)+((p2W+(p3wiggle*2)/2)));
cylinder(h=p3wallH,d=centerlineD+((p2W+(p3wiggle*2)/2)));
}
} //end main union
cylinder(h=p3wallH,d=p3baseID);
translate([-p3baseOD/2,-p3baseOD/2,0]){
cube([p3baseOD,p3baseOD/2,p3wallH]);
}
rotate([0,0,-360/p3number]){
translate([-p3baseOD/2,0,0])
cube([p3baseOD,p3baseOD/2,p3wallH]);
}
//slots
for(i=[1:p2needles*(p2number/p3number)]){
rotate([0,0,(360/p2number/p2needles/2)-(360/p2number/p2needles*i)]){
translate([((-centerlineD-(p3wallW*2)-((p2W+(p3wiggle*2)/2)))/2)-0.1,-p3grooveW/2,p3grooveH1])
cube([p3wallW+0.2,p3grooveW,p3grooveH2-p3grooveH1]);
}
}
//first and last holes
rotate([0,0,-firstcenter]){
translate([((-centerlineD-(p3wallW*2)-((p2W+(p3wiggle*2)/2)))/2)-0.1,0,p2holeH+p3baseH])
rotate([0,90,0]){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
}
}
rotate([0,0,-(360/p2number*(p3number-1))+firstcenter]){
translate([((-centerlineD-(p3wallW*2)-((p2W+(p3wiggle*2)/2)))/2)-0.1,0,p2holeH+p3baseH])
rotate([0,90,0]){
cylinder(h=p2OD-p2ID+0.2, d=p2holeD);
}
}
//middle holes
}
}
} //end module
Original Files
Notes
- all measurements in millimeters as used in original design