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tiltedDelta.scad
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tiltedDelta.scad
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use <ext20v.scad>;
//cube([10,10,10]);
// openbeam sells 1515 extrusions in 270length (and others).
// I think I got misumi at 300, but they are selectable.
// the simple drawing, ext15.scad has no fuzz, so I'll
// use the OpenBeam model, ext15ob.scad until I add that.
use <ext15ob.scad>;
baseExtLen = 300;
railTilt = 10.8; // degrees
use <nema17.scad>;
difference() {
//union() {
translate([0,140,100]) baseVertex();
// translate([0,0,960]) apex();
// translate([0,213,-4]) foot();
//}
dilatedExtrusions(); // for cut-outs for extrusions
}
module foot() {
//%rotate([0,0,45]) cylinder(r1=20,r2=5,h=20,$fn=4);
hull() {
for(x=[-1,1]) for(y=[-1,1])
translate([12*x,12*y,2]) sphere(2,$fn=24);
translate([0,0,12]) sphere(12,$fn=36);
}
}
module apex() {
difference() {
hull() for (a=[-120,0,120]) rotate([0,0,a]) for(x=[-1,1]) {
translate([10*x,36, 0]) sphere(2,$fn=36);
translate([10*x,33,16]) sphere(2,$fn=36);
}
translate([0,0,-4]) cylinder(r1=15,r2=10,h=24,$fn=6);
// remove outside slot residual, and (most of) side rails
for (a=[-120,0,120]) rotate([0,0,a])
translate([0,30, 0])
rotate([railTilt,0,0]) cube([19.6,16,50],center=true);
// side bolt holes
for (a=[-120,0,120]) rotate([0,0,a]) for(x=[-1,1])
translate([15*x,27.1,8.6])
rotate([0,-90*x,0]) rotate([0,0,90]) M5boltHole(.15);
// inside bolt holes
for (a=[-120,0,120]) rotate([0,0,a])
translate([0,11,6])
rotate([railTilt-90,0,0]) M5boltHole(.15);
// flat edge cut-outs
//for (a=[-60:120:355]) rotate([0,0,a])
// #translate([0,28,-4]) scale([3.5,1,1]) cylinder(r1=7,r2=7,h=24,$fn=6);
}
}
//%scale(1.02) nema17();
//nema17MountHoles();
// shave off some odities from main vertex and drill holes
module baseVertex() difference() {
baseVertexShell();
translate([0,11,-16]) rotate([railTilt-90,0,0]) {
//%scale(1.02) nema17();
nema17MountHoles();
}
// remove outside of vertical rail strip
translate([0,60,0]) rotate([railTilt,0,0])
cube([10,5,20],center=true);
railZone();
mirror([1,0,0]) railZone();
for (a=[-1,1]) translate([31.6*a,2,0]) rotate([0,0,-90-a*60])
rotate([0,90,0]) M3railHole(8);
for (a=[-1,1]) translate([17*a,28,0]) rotate([0,0,-90-a*60])
rotate([0,90,0]) M3railHole(8);
// inside 20v mount screw
translate([0,37.5,-4])
rotate([railTilt-90,0,0]) M5boltHole();
for (a=[-1,1]) translate([16.5*a,53,0])
rotate([0,-90*a,0]) rotate([0,0,a*(90-railTilt)]) M5boltHole();
}
// hole for setting up an 8mm M3 screw to attach to a 1515 extrusion
module M3railHole() {
nutRad = 5.46/2/cos(30);
M3screwHole(8);
translate([0,0,-8.8]) rotate([0,0,30])
cylinder(r1=nutRad+.2,r2=nutRad,h=4,$fn=6);
}
// get rid of extranious junk around rails on vertex
module railZone() {
translate([-47,1.5,0]) rotate([0,0,-30]) {
//hull() {
cube([12,100,16],center=true);
//translate([-10,30,-40]) cube(1);
//}
hull() {
translate([-10,20,-40]) cube(1);
translate([4,0,-5]) cube([9,100,5],center=true);
}
}
}
module baseVertexShell() {
cr=2; // corner radius
zHi=7.5-cr;
zLo=-7.5+cr;//-4;
union() {
hull() {
for(x=[-1,1]) {
translate([11*x,59,zHi]) sphere(r=cr,$fn=24);
translate([11*x,61,zLo]) sphere(r=cr,$fn=24);
for(z=[zLo,zHi]) translate([27*x,44,z]) sphere(r=cr,$fn=24);
for(z=[zLo,zHi]) translate([44*x,-2,z]) sphere(r=cr,$fn=24);
}
// for(z=[zLo,zHi]) {
// translate([x*40,0,z]) sphere(r=cr,$fn=24);
// }
// }
}
hull() for(x=[-1,1]) {
// repeat lower nodes on outside of vertex tip
translate([11*x,61,zLo]) sphere(r=cr,$fn=24);
translate([30*x,15,-36]) sphere(r=cr,$fn=24);
translate([30*x, 4,-4 ]) sphere(r=cr,$fn=24);
}
//%hull() {
// translate([0,40,0]) cube([30,1,1],center=true);
// cube([70,2*cr,10],center=true);
// for (x=[-1,1]) translate([x*25,8,-40]) sphere(r=cr,$fn=24);
//}
}
}
module M3screwHole(holeDepth=10,sinkHeight=4,fuzz=0.05) {
translate([0,0,-holeDepth]) cylinder(r=2.96/2+fuzz,h=holeDepth+1,$fn=16);
cylinder(r1=5.38/2+fuzz,r2=5.38/2+sinkHeight*fuzz/2,h=sinkHeight,$fn=20);
}
module nema17MountHoles() {
// make central more superset of shaft
cylinder(r=11+1, h=2*9+35, $fn=48,center=true);
//#cylinder(r=2.5+.2, h=25, $fn=36); // shaft
for (a = [0:90:359]) {
rotate([0, 0, a]) translate([15.5, 15.5, 0])
cylinder(r=2.94/2+.1, h=20, $fn=11,center=true);
}
}
module dilatedExtrusions() {
for (a=[-120,0,120]) rotate([0,0,a])
translate([0,212,0])
rotate([railTilt,0,0]) {
// make a little indent at foot of model to make feet fit better
difference() {
ext20(1000,.1,0);
cube([14,14,1],center=true);
}
// want NEMA face plate 36ish mm from extrusion.
// make sure this is carved out
hull() {
for(x=[-1,1]) translate([25*x,-7.5-36-4,100])
cylinder(r=4,h=80,$fn=24,center=true);
translate([0,-7.5-36-30,100]) cube([90,1,80],center=true);
}
//%hull() {
// translate([0,-7.5-36-20,100]) cube([50,40,80],center=true);
// translate([0,-7.5-36-30,100]) cube([90,1,80],center=true);
//}
// clear zone for linear motion parts around shaft
hull() for(x=[-1,1]) {
translate([10*x,-19,50]) cylinder(r=3,h=100,$fn=24);
translate([20*x,-36,50]) cylinder(r=3,h=100,$fn=24);
}
}
for (a=[-90,30,150]) rotate([0,0,a])
translate([110,(baseExtLen+1)/2,100])
rotate([90,0,0]) difference() {
ext15(baseExtLen+1,.1);
// cut out ext hallow .5mm too long, but put a little
// spacer at the desired position
cube([12,12,1],center=true);
cylinder(r1=2,r2=1,h=2,$fn=16);
translate([0,0,baseExtLen+1]) cube([12,12,1],center=true);
translate([0,0,baseExtLen-1]) cylinder(r1=1,r2=2,h=2,$fn=16);
}
}
m5rad = 4.92/2;//4.88/2;
m5_head_radius = 8.62/2;//8.5/2; // 5mm head height, uses 4mm hex drive
module M5boltHole(fuzz=0.05) {
cylinder(r=m5rad+fuzz,h=11,$fn=15);
translate([0,0,-14])
cylinder(r2=m5_head_radius,r1=m5_head_radius+1,h=15,$fn=24);
// extra clearance for extrusion nut
translate([0,0,8.8]) cube([10,16,4],center=true);
translate([0,0,6 ]) cylinder(r=3.5+.2,h=4,$fn=17);
}