RotoKnitic v19.01

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

google doc

Pick-a-Needle

google doc

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

• https://www.digikey.com/product-detail/en/pontiac-coil-inc/F0451A/527-1016-ND/668301

SCAD

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
 

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

Links

https://www.thingiverse.com/thing:2072364/files