RotoKnitic v19.01
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Using same parts and materials from OSE CircularKnitic v18.03, but switch mounting plates so that the mountain is stationary.
- requires spinning spool for fabric output
- allows for more multiple mountains and input threads
Design
- Needles will rotate in the needle holder
- https://github.com/OpenSourceEcology/circular_knitic_pick-a-needle
Concept
Standard
Pick-a-Needle
Goals
- change direction
- sock heels
Needle Accomidation
- pick-a-needle, optionally raise needles to an inactive postion
- Test laser cut needles, printed latch?
- Test 3D printed needles
Fabric Spool
- Apply constant tension on fabric
- Roll onto spool for easy handling and storage
Provisional BOM
Part SCAD Code
Variable Profiles
CKvars.scad
Needles
2D Laser Cut Parts
3D Printed Parts
p4 "yarn holder"
include <CKvars.scad>;
CKp4();
module CKp4(){
rez=p2number*p2needles*2;
$fn=rez; //defines resolution of circles.
translate([p4baseOD/2,0,0]){
difference(){
union(){
cylinder(h=p4baseH,d=p4baseOD-(p4basegapW*2)-((p4baseW-p4basegapW)/2*2));
//ramps
for(i=[1:p2needles*(p2number/p4number)]){
rotate([0,0,(360/p2number/p2needles)-(360/p2number/p2needles*i)-(((360/p2number/p2needles))/2)]){
difference(){
minkowski(){
union(){
translate([-p4baseOD/2+p4rampfromOD,p4rampWm/2,p4rampH+p4baseH-(p4rampC1/2)])
rotate([90,0,0])
cylinder(h=p4rampWm,d=p4rampC1);
intersection(){
translate([-10,0,3.82])
translate([-p4baseOD/2+p4rampfromOD,p4rampWm/2,p4rampH+p4baseH-(p4rampC2/2)])
rotate([90,0,0])
cylinder(h=p4rampWm,d=p4rampC2);
translate([-7,0,-2.86/2])
translate([-p4baseOD/2+p4rampfromOD,p4rampWm/2,p4rampH+p4baseH-(p4rampC2/2)])
cube([p4rampC2,p4rampC2,p4rampC2],center=true);
}
}//end union
difference(){
translate([-p4rampMinkD/2,0,0])
cylinder(d=p4rampMinkD,h=0.01, $fn=36);
translate([-p4rampMinkD,0,-0.01])
cube([p4rampMinkD,p4rampMinkD,0.02], center=true);
} //end diff
} //end mink
translate([-p4rampC2/2,0,0])
translate([-p4baseOD/2+p4rampfromOD,p4rampW/2,p4rampH+p4baseH-(p4rampC2/2)])
cube([p4rampC2,p4rampC2,p4rampC2+1],center=true);
translate([0,0,0])
translate([-p4baseOD/2+p4rampfromOD,p4rampW/2,p4baseH-(p4rampC2/2)-0.1])
cube([p4rampC2,p4rampC2,p4rampC2],center=true);
translate([0,-p4clawW/2,0])
translate([-(p4baseID/2)-p4rampfromID,0,p4baseH])
cube([(p4baseID/2)+p4rampfromID,p4clawW,p4rampoverhangH]);
translate([-7,0,0])
translate([-p4baseOD/2+p4rampfromOD,(p4rampW/2)+(p4rampC2/2)-0.01,p4rampH+p4baseH-(p4rampC2/2)])
cube([p4rampC2,p4rampC2,p4rampC2],center=true);
translate([-7,0,0])
translate([-p4baseOD/2+p4rampfromOD,-(p4rampW/2)-(p4rampC2/2)+0.01,p4rampH+p4baseH-(p4rampC2/2)])
cube([p4rampC2,p4rampC2,p4rampC2],center=true);
}//end ramps difference
} //end for rotate
} //end for
//claws
for(i=[1:p2needles*(p2number/p4number)]){
rotate([0,0,(360/p2number/p2needles)-(360/p2number/p2needles*i)-(((360/p2number/p2needles))/2)]){
hull(){
translate([-p4baseOD/2,-p4clawW/2,0])
#cube([(p4baseOD-p4baseID)/2,p4clawW,p4basegapH]);
translate([-p4baseOD/2,-((p4rampW+p4clawWslanttop)/2),p4baseH-0.1])
#cube([(p4baseOD-p4baseID)/2,p4rampW+p4clawWslanttop,0.1]);
} //end hull
}
}//end for
} //end main union
cylinder(h=p4baseH,d=p4baseID);
//simiple chamfer of inside corner
translate([0,0,p4baseH-0.5])
cylinder(h=0.5,d1=p4baseID+0.5,d2=p4baseID+1.9);
translate([0,0,p4baseH-0.5-0.5])
cylinder(h=0.5,d1=p4baseID,d2=p4baseID+0.5);
translate([-p4baseOD/2,-p4baseOD/2,0]){
cube([p4baseOD,p4baseOD/2,p4baseH]);
}
rotate([0,0,-360/p4number]){
translate([-p4baseOD/2,0,0])
cube([p4baseOD,p4baseOD/2,p4baseH]);
}
difference(){
cylinder(h=p4basegapH,d=p4basegapOD);
cylinder(h=p4basegapH,d=p4basegapID);
}
//bolt holes
for(i=[0:(p2number/p4number)-1]){
rotate([0,0,(-360/p2number/p2needles*0.5)+(i*-360/p2number)]){
if(p2p4type==1){
translate([-(p4baseOD/2)+((p4baseOD-p4baseID)/2),0,p4holeH])
rotate([0,270,0])
translate([0,0,0])
union(){
cylinder(d1=p2p4flatHD,d2=0,h=(p2p4flatHD/2)/tan(45),$fn=36);
translate([0,0,-(p2p4flatHD)/tan(45)])
cylinder(d1=p2p4flatHD*3,d2=p2p4flatHD,h=(p2p4flatHD)/tan(45),$fn=36);
cylinder(d=p2p4flatD,h=((p4baseOD-p4baseID)/2)+2,$fn=36);
}//end union
}//end if
if(p2p4type==0){
translate([-(p4baseOD/2)+((p4baseOD-p4baseID)/2),0,p4holeH])
rotate([0,270,0])
translate([0,0,0])
union(){
translate([0,0,-p2p4boltHH/2])
cylinder(d=p2p4boltHD,h=p2p4boltHH,$fn=36);
cylinder(d=p2p4boltD,h=((p4baseOD-p4baseID)/2)+2,$fn=36);
}//end union
}//end if
}
}
//second set
for(i=[0:(p2number/p3number)-1]){
rotate([0,0,-(360/p2number/p2needles*0.5)+(360/p2number/p2needles)+(i*-360/p2number)+(-360/p2number)]){
if(p2p4type==1){ // if flat socket
translate([-(p4baseOD/2)+((p4baseOD-p4baseID)/2),0,p4holeH])
rotate([0,270,0])
translate([0,0,0])
union(){
cylinder(d1=p2p4flatHD,d2=0,h=(p2p4flatHD/2)/tan(45),$fn=36);
translate([0,0,-(p2p4flatHD)/tan(45)])
cylinder(d1=p2p4flatHD*3,d2=p2p4flatHD,h=(p2p4flatHD)/tan(45),$fn=36);
cylinder(d=p2p4flatD,h=((p4baseOD-p4baseID)/2)+2,$fn=36);
}//end union
}//end if
if(p2p4type==0){ // if regular socket
translate([-(p4baseOD/2)+((p4baseOD-p4baseID)/2),0,p4holeH])
rotate([0,270,0])
translate([0,0,0])
union(){
translate([0,0,-p2p4boltHH/2])
cylinder(d=p2p4boltHD,h=p2p4boltHH,$fn=36);
cylinder(d=p2p4boltD,h=((p4baseOD-p4baseID)/2)+2,$fn=36);
}//end union
}//end if
} //end rotate
} //end for
//end mounting holes
//trim end
if(p4number>1){
rotate([0,0,-(360/(p4baseOD*PI/p4endtrim))])
mirror([1,1,0])
cube([p4baseOD/2,p4baseOD/2,p4rampH+p4baseH]);
}
} //end main difference
} //end main translate
} //end module
Parts
Pontiac Coil L-09
PCL90();
module PCL90(){
x=36.576;
y=41.402;
z=51.308;
topz=28.448; ///distance from base to center of top mount hole
top2stroke0=42.7482;
top2stroke1=68.1482;
plungerholeD=2.4384;
plungercutZ=9.652;
plungercutY=3.556;
plungertop2c=3.9624;
holeOD=4.1656;
botz=topz-12.7;
D=12.7;
difference(){
union(){
cube([x,y,z]);
translate([x/2,y/2,topz])
difference(){
cylinder(d=D,h=top2stroke0+plungertop2c);
translate([0,D/2,top2stroke0])
rotate([90,0,0])
#cylinder(d=plungerholeD,h=D);
translate([-D/2,-plungercutY/2,top2stroke0+plungertop2c-plungercutZ])
#cube([D,plungercutY,plungercutZ]);
}
}
translate([23.7998/2,0,0]){
translate([x/2,y,topz])
rotate([90,0,0])
cylinder(d=holeOD,h=y);
translate([x/2,y,botz])
rotate([90,0,0])
cylinder(d=holeOD,h=y);
}
translate([-23.7998/2,0,0]){
translate([x/2,y,topz])
rotate([90,0,0])
cylinder(d=holeOD,h=y);
translate([x/2,y,botz])
rotate([90,0,0])
cylinder(d=holeOD,h=y);
}
}//end main diff
}//end module
Full Assembly
BOM
TODO
- remove p8 plate connector under mountain
- put hole for makerbeam on plate below
- breakup tabletop plate into multiple pieces to make max size smaller
- could make all cut plates hexagons except for geared plate.
- could make geared a little larger if move support spacer to bridge stepper gear
- tweak outiside diameter values to remove p9
- change p9 to a simple p8 variant near steppers
- could just set p9 thickness to zero for now