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Refactor of hoop scad code, minor changes in other models.

master
Martin 2018-11-09 08:28:33 +01:00
rodzic 0215694d80
commit 0ccdfc15e8
3 zmienionych plików z 49 dodań i 42 usunięć
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73
mechanics/hoop.scad
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@ -1,57 +1,65 @@
use <polyround.scad>;
// NOTE: consider losses on round corners when setting workarea dimensions
workareaWidth = 130;
workareaHeight = 150;
frameHeight = 8;
innerFrameThickness = 5;
outerFrameThickness = 9;
// NOTE: consider losses (presser foot size) on corners when setting workarea dimensions
// print with infill above 60% for better stiffness
// this default workarea 130x150 needes 200x200 printer platform space
hoop(workareaWidth = 130, workareaHeight = 150);
// smaller hoops
//hoop(workareaWidth = 80, workareaHeight = 100);
//hoop(workareaWidth = 60, workareaHeight = 80);
innerOuterFramesSpacing = 0.5;
mountingHolesSpacing = 40;
// print with infill above 50% for better stiffness
// this default workarea 130x150 needes 200x200 printer platform space
hoop();
module hoop(){
module hoop(workareaWidth = 130, workareaHeight = 150, frameHeight = 8, innerFrameThickness = 3, outerFrameThickness = 5, roundness = 5, tightenerSpace = 3, sizeOffset = 0, withHandle = true){
// inner frame
innerFrameWidth = workareaWidth+innerFrameThickness;
innerFrameHeight = workareaHeight+innerFrameThickness;
innerFrameWidth = workareaWidth+innerFrameThickness*2+sizeOffset;
innerFrameHeight = workareaHeight+innerFrameThickness*2+sizeOffset;
linear_extrude(height = 1.5) difference(){
roundRectangle(innerFrameWidth, innerFrameHeight, center=true);
roundRectangle(innerFrameWidth, innerFrameHeight, roundness, center=true);
intersection(){
roundRectangle(workareaWidth, workareaHeight, center=true);
roundRectangle(workareaWidth+sizeOffset, workareaHeight+sizeOffset, roundness, center=true);
square(size=[workareaWidth, workareaHeight], center=true);
}
}
linear_extrude(height = frameHeight) difference(){
roundRectangle(innerFrameWidth, innerFrameHeight, center=true);
roundRectangle(workareaWidth, workareaHeight, center=true);
roundRectangle(innerFrameWidth, innerFrameHeight, roundness, center=true);
roundRectangle(workareaWidth+sizeOffset, workareaHeight+sizeOffset, roundness, center=true);
}
// outer frame
spacing = innerOuterFramesSpacing*2;
outerFrameWidth = innerFrameWidth+outerFrameThickness+spacing;
outerFrameHeight = innerFrameHeight+outerFrameThickness+spacing;
outerFrameWidth = innerFrameWidth+outerFrameThickness*2+spacing;
outerFrameHeight = innerFrameHeight+outerFrameThickness*2+spacing;
difference(){
union(){
linear_extrude(height = frameHeight) difference(){
roundRectangle(outerFrameWidth , outerFrameHeight, center=true);
roundRectangle(innerFrameWidth+spacing, innerFrameHeight+spacing, center=true);
roundRectangle(outerFrameWidth , outerFrameHeight, roundness, center=true);
roundRectangle(innerFrameWidth+spacing, innerFrameHeight+spacing, roundness, center=true);
}
// tightening handle
// adjust magic number divider to elminate gap between frame and handle
translate([-8,outerFrameHeight/28+outerFrameHeight/2,0])
translate([-9,outerFrameHeight/28+3/roundness+outerFrameHeight/2,0])
difference(){
cube([20,12,frameHeight]);
//screw hole
translate([20,8,frameHeight/2]) rotate([0,-90,0]) {cylinder(r=1.8, h=20); cylinder(r=3.5*0.95, h=3, $fn=6);}
tightnWidth = 20+tightenerSpace;
cube([tightnWidth ,12,frameHeight]);
//screw hole
translate([tightnWidth,8,frameHeight/2]) rotate([0,-90,0]) {cylinder(r=1.8, h=tightnWidth+1); cylinder(r=3.5*0.95, h=3, $fn=6);}
}
}
}
translate([-1,0,0]) cube([2,innerFrameHeight,frameHeight]);
translate([-1,0,0]) cube([tightenerSpace,innerFrameHeight,frameHeight]);
}
// outer frame handle
translate([outerFrameWidth/15+ innerFrameWidth/2,0,0]) {
if (withHandle)
translate([outerFrameWidth/15+ innerFrameWidth/2,0,0]) {
handle(frameHeight);
}
}
module handle(frameHeight)
{
difference(){
union(){
translate([0,-20,0]) cube([40,40,frameHeight/2]);
@ -66,15 +74,14 @@ module hoop(){
translate([0,i*mountingHolesSpacing/2,3+frameHeight/2]) rotate([0,90,0]){
cylinder(r=5.5, h=36); cylinder(r=1.8, h=41);
}
}
}
}
module roundRectangle(width=20, height=25, center = false)
module roundRectangle(width=20, height=25, roundness = 5, center = false)
{
// those two values bellow affects roundness of the frames
divider = 15;
cornerR = min([width,height])/5;
cornerR = min([width,height])/roundness;
points=[
[0, 0, cornerR],
@ -88,10 +95,10 @@ module roundRectangle(width=20, height=25, center = false)
];
if(center){
translate([-width/2, -height/2,0]) polygon(polyRound(points,5));
translate([-width/2, -height/2,0]) polygon(polyRound(points,10));
}
else{
polygon(polyRound(points,5));
polygon(polyRound(points,10));
}

10
mechanics/hoop_plotter_adapter.scad
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@ -7,15 +7,15 @@ totalSpacing = 20;
rotate([90,0,0])
difference(){
union(){
translate([totalSpacing-8,-width/2,17]) cube([8,width,8]);
translate([0,-width/4,17]) cube([16,width/2,8]);
translate([0,-width/2,14]) cube([totalSpacing,width,3]);
translate([totalSpacing-8,-width/2,15]) cube([8,width,8]);
translate([0,-width/4,15]) cube([16,width/2,8]);
translate([0,-width/2,11]) cube([totalSpacing,width,4]);
translate([0,-width/2,0]) cube([8,width,15]);
}
for(i=[1,-1])
translate([0,i*mountingHolesSpacing/2,21]) rotate([0,90,0]){
cylinder(r=5.5, h=totalSpacing-4); cylinder(r=mountingHolesDia/2, h=totalSpacing);
translate([0,i*mountingHolesSpacing/2,19]) rotate([0,90,0]){
cylinder(r=6.5, h=totalSpacing-4); cylinder(r=mountingHolesDia/2, h=totalSpacing);
}
// tool holder holes
for(i=[1,-1])

8
mechanics/machine_specific/motor_encoder_parts.scad
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@ -1,4 +1,4 @@
encoder_wheel_axial_hole_dia = 9.3;
encoder_wheel_axial_hole_dia = 9.6;
encoder_blades_no = 10;
encoder_wheel_dia = encoder_wheel_axial_hole_dia*1.6 + 10;
@ -49,8 +49,8 @@ module encoder_wheel(){
module encoder_blade(angle = 10)
intersection(){
difference(){
cylinder(r=encoder_wheel_dia/2, h = 1);
translate([0,-encoder_wheel_dia,0]) cube([encoder_wheel_dia, encoder_wheel_dia*2, 1]);
cylinder(r=encoder_wheel_dia/2, h = 2);
translate([0,-encoder_wheel_dia,0]) cube([encoder_wheel_dia, encoder_wheel_dia*2, 2]);
}
rotate([0,0,angle]) cube([encoder_wheel_dia, encoder_wheel_dia, 1]);
rotate([0,0,angle]) cube([encoder_wheel_dia, encoder_wheel_dia, 2]);
};