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Redesigned quadcopter frame

master
Thomas Buck 7 years ago
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69dd205971
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39276e8e8a
2 changed files with 145 additions and 119 deletions
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  1. 261
      Copter/mgh-quad.scad
  2. 3
      README.md

261
Copter/mgh-quad.scad
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@ -1,138 +1,165 @@
//parametric micro quadcopter frame for lulfro and others
//Patrick Sapinski
//v2
//01/06/16
//https://www.thingiverse.com/thing:843597
motor_size = 8.45;
motor_height = 10;
motor_wall_d = 2.2;
motor_clamp_cut = 3;
motorD = 8.2;
motorZ = 22;
shellThickness = 3.5;
armW = 6;
m2mDist = 100;
batteryWidth = 35.0;
quadThickness = 5;
motor_helper_disc = 40;
motor_helper_height = 0.2;
usbWidth = 14;
usbOff = -1;
motor_arm_width = 8;
motor_arm_height = 6;
motor_arm_length = 20;
propLength = 70;
motor_body_len = 40;
motor_body_height = 8;
motor_body_wall = 2;
module makeArmHollow() {
translate([m2mDist/2,0,0])
union(){
//hollow out the motor holder
sphere(r=motorD/2);
cylinder(h = motorZ/2, r=motorD/2);
//hollow out the groove for the wire in the motor holder
translate([-shellThickness,0,-shellThickness])
cube([m2mDist,armW - shellThickness,motorZ],center=true);
//???
translate([-shellThickness*2,-armW/2 + shellThickness/2,-motorZ/2])
cube([motorZ,armW - shellThickness,motorZ + shellThickness]);
}
triangle_cut_height = 8;
cable_cut_width = 3;
cable_cut_height = 1.5;
motor_body_arm_dist = (motor_body_len - motor_arm_width + 2) / sqrt(2);
fc_width = 20;
fc_height = 28;
rx_width = 12;
rx_height = 25;
$fn = 25;
module triangle(o_len, a_len, depth) {
linear_extrude(height=depth)
polygon(points=[[0,0],[a_len,0],[0,o_len]], paths=[[0,1,2]]);
}
module copter_frame() {
difference() {
union(){
//translate([15,5,4]) rotate([90,0,0]) linear_extrude(height = 2) polygon(points=[[0,0],[10,0],[12,7],[0,7]]);
//translate([15,-3,4]) rotate([90,0,0]) linear_extrude(height = 2) polygon(points=[[0,0],[10,0],[12,7],[0,7]]);
//create each arm
rotate([0,0,45]){
for (i = [0 : 3])
rotate([0,0,i * 90])
translate([m2mDist/2,0,0])
//create the motor holder and arm
union(){
translate([-m2mDist/2 + motorD/2,-armW/2,motorZ/2 - armW])
cube([m2mDist/2,armW,armW]);
cylinder(h = motorZ/2, r=motorD/2 + shellThickness/2);
sphere(r=motorD/2 + shellThickness/2);
//prop preview
//%rotate([0,0,45]) cylinder(d=propLength, h=5);
module fc_pcb() {
%cube([fc_width, fc_height, 2]);
}
module rx_pcb() {
%cube([rx_width, rx_height, 2]);
}
module motor_clamp() {
// motor / prop mockup
%cylinder(d = motor_size, h = motor_height + 5);
%cylinder(d = 2, h = motor_height + 15);
%translate([0, 0, 20]) cylinder(d = 65, h = 2);
difference() {
union () {
color("blue")
hull() {
cylinder(d = motor_size + motor_wall_d, h = motor_height);
// print helper discs ("brim")
translate([0, 0, 10.8])
cylinder(h=0.2, d=40);
translate([-motor_arm_width / 2, -(motor_size + motor_wall_d) / 2 - 2, motor_height - motor_arm_height])
cube([motor_arm_width, 1, motor_arm_height]);
}
color("green")
translate([0, 0, motor_height - motor_helper_height])
cylinder(d = motor_helper_disc, h = motor_helper_height);
color("blue")
sphere(d = motor_size + motor_wall_d);
}
//create the FC cube
translate([0,0,motorZ/2 - armW/2])
cube([batteryWidth + shellThickness,batteryWidth + shellThickness,armW],center=true);
// cable hole
translate([-cable_cut_width / 2, -(motor_size + motor_wall_d) / 2 - cable_cut_height, -5])
cube([cable_cut_width, cable_cut_height, 20]);
//parabolic arms
translate([0,0,8])
difference() {
cube([m2mDist-20,m2mDist-20,armW],center=true);
for (i = [0 : 3])
rotate([0,0,i * 90])
translate([m2mDist - 35,0,-10])
oval(m2mDist/2,m2mDist/2.8, 20);
}
// motor hole
translate([0, 0, -1])
cylinder(d = motor_size, h = motor_height + 2);
// clamp cutout
translate([-motor_clamp_cut / 2, -3, -motor_size - motor_wall_d - 1])
cube([motor_clamp_cut, motor_size + motor_wall_d + 5, motor_height + motor_size + motor_wall_d + 2]);
sphere(d = motor_size);
}
}
module arm() {
motor_clamp();
translate([usbOff, batteryWidth / 2 - 2, -0.75])
cube([usbWidth, 5, 10]);
//create each arms hollow area
rotate([0,0,45]){
rotate([0,0,90]) makeArmHollow();
rotate([0,0,180]) makeArmHollow();
rotate([0,0,270]) makeArmHollow();
rotate([0,0,360]) makeArmHollow();
// motor arm itself
color("blue")
translate([-motor_arm_width / 2, -(motor_arm_length + ((motor_size + motor_wall_d) / 2) + 2), motor_height - motor_arm_height])
cube([motor_arm_width, motor_arm_length, motor_arm_height]);
}
module body() {
// arms
for(r = [45 : 90 : 360]) {
rotate([0, 0, r])
translate([0, motor_arm_length + ((motor_size + motor_wall_d) / 2) + motor_body_arm_dist + 1, 0])
difference() {
arm();
translate([-cable_cut_width / 2, -motor_arm_length - ((motor_size + motor_wall_d) / 2) - 2, motor_height - cable_cut_height])
cube([cable_cut_width, motor_arm_length + 1, cable_cut_height + 1]);
}
}
translate([0,0,motorZ/2 - armW/2 - motorZ/2 + shellThickness/2])
union(){
//hollow out some grooves in the arms for the wires
rotate([0,0,45])
cube([armW - shellThickness,m2mDist/2,motorZ/1.5],center=true);
rotate([0,0,45])
cube([m2mDist/2,armW - shellThickness,motorZ/1.5],center=true);
color("red")
translate([-motor_body_len / 2, -motor_body_len / 2, motor_height - motor_body_height])
difference() {
cube([motor_body_len, motor_body_len, motor_body_height]);
for(r = [45 : 90 : 360]) {
translate([motor_body_len / 2, motor_body_len / 2, -motor_height + motor_body_height])
rotate([0, 0, r])
translate([-cable_cut_width / 2, motor_body_len / 2 * sqrt(2) - 6, motor_height - cable_cut_height]) {
cube([cable_cut_width, 8, cable_cut_height + 1]);
translate([0, -1, -5])
cube([cable_cut_width, cable_cut_height, 10]);
}
}
}
//hollow out the FC hole
translate([0,0,motorZ/2 - armW/2 - shellThickness/2])
cube([batteryWidth,batteryWidth,armW],center=true);
//drunk code below
b = 11;
h = 11;
w = 4;
rotate(a=[0,0,45])
translate([2,2,motorZ/2])
linear_extrude(height = w, center = true, convexity = 10, twist = 0)
polygon(points=[[0,0],[h,0],[0,b]], paths=[[0,1,2]]);
}
module quad() {
difference() {
translate([0, 0, motor_height])
rotate([180, 0, 0]) {
body();
translate([-3, -14, 6])
fc_pcb();
translate([-16, -12.5, 6])
rx_pcb();
}
rotate(a=[0,0,45 + 180])
translate([2,2,motorZ/2])
linear_extrude(height = w, center = true, convexity = 10, twist = 0)
polygon(points=[[0,0],[h,0],[0,b]], paths=[[0,1,2]]);
// cut out for actual PCBs
translate([-(motor_body_len - (2 * motor_body_wall)) / 2, -(motor_body_len - (2 * motor_body_wall)) / 2, motor_body_wall])
cube([motor_body_len - (2 * motor_body_wall), motor_body_len - (2 * motor_body_wall), motor_body_height - motor_body_wall + 1]);
rotate(a=[0,0,45 + 90])
translate([2,2,motorZ/2])
linear_extrude(height = w, center = true, convexity = 10, twist = 0)
polygon(points=[[0,0],[h,0],[0,b]], paths=[[0,1,2]]);
// usb cutout
translate([-2, -motor_body_len / 2 - 1, 2])
cube([12, 4, 7]);
rotate(a=[0,0,45 + 270])
translate([2,2,motorZ/2])
linear_extrude(height = w, center = true, convexity = 10, twist = 0)
polygon(points=[[0,0],[h,0],[0,b]], paths=[[0,1,2]]);
}
}
module oval(w,h, height, center = false) {
scale([1, h/w, 1]) cylinder(h=height, r=w, center=center);
// triangle cut-outs
translate([0, -motor_body_len / 3, -1]) {
triangle(triangle_cut_height, motor_body_len / 4, 4);
triangle(triangle_cut_height, -motor_body_len / 4, 4);
}
translate([0, motor_body_len / 3, -1]) {
triangle(-triangle_cut_height, motor_body_len / 4, 4);
triangle(-triangle_cut_height, -motor_body_len / 4, 4);
}
translate([-motor_body_len / 3, 0, -1])
rotate([0, 0, -90]) {
triangle(triangle_cut_height, motor_body_len / 4, 4);
triangle(triangle_cut_height, -motor_body_len / 4, 4);
}
translate([motor_body_len / 3, 0, -1])
rotate([0, 0, 90]) {
triangle(triangle_cut_height, motor_body_len / 4, 4);
triangle(triangle_cut_height, -motor_body_len / 4, 4);
}
}
}
translate([0, 0, 11])
rotate([180, 0, 0])
copter_frame();
quad();

3
README.md
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@ -2,5 +2,4 @@
## MGH-Projekt (Mehrgenerationenhaus)
The quadcopter frame design is taken from / based on this [Parametric Brushed Micro Quadcopter](https://www.thingiverse.com/thing:843597) by DrKow.
Includes our own quad copter frame design and code and plans for an Rx.
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