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Merge branch 'bldc_motors' of https://github.com/martinbudden/NopSCADlib into martinbudden-bldc_motors

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This commit is contained in:
Chris Palmer
2021-05-31 16:25:23 +01:00
parent 53acaac379 00ca412441
commit b09efb10e0
5 changed files with 358 additions and 2 deletions
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3
global_defs.scad
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@@ -27,6 +27,7 @@
// Setting $_bom in the local file overrides it in the local file but not in the libs.
//
rr_green = [0, 146/255, 0]; // RepRap logo colour
crimson = [220/255, 20/255, 60/255];
$_bom = is_undef($bom) ? 0 : $bom; // 0 no bom, 1 assemblies and stls, 2 vitamins as well
$exploded = is_undef($explode) ? 0 : $explode; // 1 for exploded view
@@ -35,7 +36,7 @@ extrusion_width = is_undef($extrusion_width) ? 0.5 : $extrusion_width; // fil
nozzle = is_undef($nozzle) ? 0.45 : $nozzle; // 3D printer nozzle
cnc_bit_r = is_undef($cnc_bit_r) ? 1.2 : $cnc_bit_r; // minimum tool radius when milling 2D objects
pp1_colour = is_undef($pp1_colour) ? rr_green : $pp1_colour; // printed part colour 1, RepRap logo colour
pp2_colour = is_undef($pp2_colour) ? "Crimson" : $pp2_colour; // printed part colour 2
pp2_colour = is_undef($pp2_colour) ? crimson : $pp2_colour; // printed part colour 2
pp3_colour = is_undef($pp3_colour) ? "SteelBlue" : $pp3_colour; // printed part colour 3
pp4_colour = is_undef($pp4_colour) ? "darkorange" : $pp4_colour;// printed part colour 4
show_rays = is_undef($show_rays) ? false : $show_rays; // show camera sight lines and light direction

31
tests/bldc_motors.scad Normal file
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@@ -0,0 +1,31 @@
//
// NopSCADlib Copyright Chris Palmer 2021
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
include <../core.scad>
use <../utils/layout.scad>
include <../vitamins/bldc_motors.scad>
module bldc_motors()
layout([for(b = bldc_motors) BLDC_diameter(b)])
rotate(-90)
BLDC(bldc_motors[$i]);
if($preview)
let($show_threads = 1)
bldc_motors();

3
utils/thread.scad
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@@ -191,7 +191,8 @@ module female_metric_thread(d, pitch, length, center = true, top = -1, bot = -1,
}
function metric_coarse_pitch(d) //! Convert metric diameter to pitch
= d == 1.6 ? 0.35 // M1.6
= d == 1.4 ? 0.3 // M1.4
: d == 1.6 ? 0.35 // M1.6
: [0.4, // M2
0.45,// M2.5
0.5, // M3

286
vitamins/bldc_motor.scad Normal file
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@@ -0,0 +1,286 @@
//
// NopSCADlib Copyright Chris Palmer 2021
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
//
//! Brushless DC electric motor
//
include <NopSCADlib/core.scad>
use <NopSCADlib/vitamins/rod.scad>
use <NopSCADlib/utils/thread.scad>
use <NopSCADlib/utils/tube.scad>
function BLDC_diameter(type) = type[1]; //! Diameter of motor
function BLDC_height(type) = type[2]; //! Height of motor including boss, if any, but excluding prop shaft
function BLDC_shaft_diameter(type) = type[3]; //! shaft diameter
function BLDC_shaft_length(type) = type[4]; //! Total shaft length
function BLDC_shaft_offset(type) = type[5]; //! shaft offset from base
function BLDC_body_colour(type) = type[6]; //! Body colour
function BLDC_base_diameter(type) = type[7]; //! Base diameter
function BLDC_base_height_1(type) = type[8]; //! Base height 1
function BLDC_base_height_2(type) = type[9]; //! Base height 2
function BLDC_base_hole_diameter(type) = type[10]; //! Base hole diameter
function BLDC_base_holes(type) = type[11]; //! Base holes
function BLDC_base_open(type) = type[12]; //! Base open
function BLDC_wire_diameter(type) = type[13]; //! Wire diameter
function BLDC_side_colour(type) = type[14]; //! Side colour
function BLDC_bell_diameter(type) = type[15]; //! Bell diameter
function BLDC_bell_height_1(type) = type[16]; //! Bell height 1
function BLDC_bell_height_2(type) = type[17]; //! Bell height 2
function BLDC_bell_hole_diameter(type) = type[18]; //! Bell hole diameter
function BLDC_bell_holes(type) = type[19]; //! Bell holes
function BLDC_bell_spokes(type) = type[20]; //! Bell spoke count
function BLDC_boss_diameter(type) = type[21]; //! Boss diameter
function BLDC_boss_height(type) = type[22]; //! Boss height
function BLDC_prop_shaft_length(type) = type[23]; //! Prop shaft length, including threaded section
function BLDC_prop_shaft_diameter(type) = type[24]; //! Diameter of unthreaded portion of prop shaft
function BLDC_prop_shaft_thread_length(type) = type[25]; //! Length of threaded section of prop shaft
function BLDC_prop_shaft_thread_diameter(type) = type[26]; //! Diameter of threaded section of prop shaft
bldc_cap_colour = grey(50);
bldc_shaft_colour = grey(90);
bldc_bearing_colour = grey(80);
module BLDC(type) { //! Draw specified BLDC motor
vitamin(str("BLDC(", type[0], "): Brushless DC motor ", type[0]));
body_colour = BLDC_body_colour(type);
side_colour = BLDC_side_colour(type);
body_diameter = BLDC_diameter(type);
wall_thickness = 1;
height = BLDC_height(type) - BLDC_boss_height(type);
module feet(base_diameter) {
holes = BLDC_base_holes(type);
hole_count = is_list(holes) ? len(holes) : 4;
for(i = [0 : 1 : hole_count - 1]) {
spacing = is_list(holes) ? holes[i] : holes;
radius = base_diameter / 2 - spacing / 2;
rotate(i * 360 / hole_count + (hole_count == 4 ? 45 : 0))
difference() {
hull() {
circle(r = radius);
translate([-spacing / 2, 0])
circle(r = radius);
}
translate([-spacing / 2, 0])
circle(d = BLDC_base_hole_diameter(type));
}
}
}
module cutout(d1, d2, r, h) {
translate_z(-eps)
linear_extrude(h + 2 * eps)
hull() {
translate([d1 / 2, 0])
circle(r = r);
translate([d2 / 2, -r])
square([eps, 2 * r]);
}
}
module cutout2(d1, r1, d2, r2, h) {
translate_z(-eps)
linear_extrude(h + 2 * eps)
hull() {
translate([d1 / 2, 0])
circle(r = r1);
translate([d2 / 2, 0])
circle(r = r2);
}
}
module base() {
base_diameter = BLDC_base_diameter(type);
h1 = BLDC_base_height_1(type);
h2 = BLDC_base_height_2(type);
color(body_colour)
if (BLDC_base_open(type)) {
linear_extrude(h1)
difference() {
union() {
feet(base_diameter);
circle(d = 3 * BLDC_shaft_diameter(type));
}
circle(d = 2 * BLDC_shaft_diameter(type));
}
translate_z(h1)
cylinder(d = 3 * BLDC_shaft_diameter(type), h = h2);
} else {
difference() {
union() {
render(convexity = 8)
linear_extrude(h1)
difference() {
circle(d = base_diameter);
circle(d = 2 * BLDC_shaft_diameter(type));
BLDC_base_screw_positions(type)
circle(d = BLDC_base_hole_diameter(type));
}
rotate_extrude()
polygon([ [base_diameter / 2, 0], [body_diameter / 2, h1], [body_diameter / 2, h1+h2], [body_diameter / 2 - wall_thickness, h1 + h2], [body_diameter / 2 - wall_thickness, h1], [base_diameter / 2, h1] ]);
}
r = body_diameter > 40 ? 2 : body_diameter * PI / (8 * 3);
if (body_diameter > 40) {
r = 2;
// cutout for wires
translate_z(h2 /2)
cutout(base_diameter, body_diameter, 6, h1);
for (a = [90, 180, 270])
rotate(a) {
cutout(base_diameter - 2 * r, body_diameter, r, h1 + h2 / 2);
for (b = [-90 / 4, 90 / 4])
rotate(b)
cutout(base_diameter - 5 * r, body_diameter, r, h1 + h2 / 2);
}
} else {
r = body_diameter * PI / (8 * 3);
for (a = [0, 90, 180, 270])
rotate(a)
cutout(base_diameter, body_diameter, r, h1);
}
}
}
color(bldc_bearing_colour)
translate_z(0.25)
tube(or = BLDC_shaft_diameter(type), ir = BLDC_shaft_diameter(type) / 2, h = h1, center = false);
if (show_threads)
BLDC_base_screw_positions(type)
female_metric_thread(BLDC_base_hole_diameter(type), metric_coarse_pitch(BLDC_base_hole_diameter(type)), h1, center = false, colour = body_colour);
wire_diameter = BLDC_wire_diameter(type);
for (i = [0 : 2])
color(wire_diameter >= 3 ? ["yellow", grey(20), "red"][i] : grey(20))
translate([body_diameter / 5, (i - 1) * wire_diameter, wire_diameter / 2 + 0.25 + (body_diameter > 40 ? h2/2 : 0)])
rotate([0, 90, 0])
cylinder(r = wire_diameter / 2, h = body_diameter / 2, center = false);
} // end module base
module bell() {
bell_diameter = BLDC_bell_diameter(type);
h1 = BLDC_bell_height_1(type);
h2 = BLDC_bell_height_2(type);
gap = BLDC_base_open(type) ? 0 : height > 20 ? 0.5 : 0.25;
side_length = height - h2 - h1 - gap - BLDC_base_height_1(type) - BLDC_base_height_2(type);
color(body_colour) {
translate_z(height - h2) {
difference() {
union() {
top_thickness = min(h2, 2);
render(convexity = 8)
translate_z(h2 - top_thickness)
linear_extrude(top_thickness)
difference() {
circle(d = bell_diameter);
if (BLDC_shaft_length(type) > height)
circle(d = BLDC_shaft_diameter(type));
BLDC_bell_screw_positions(type)
circle(d = BLDC_bell_hole_diameter(type));
}
rotate_extrude()
polygon([ [bell_diameter/2, h2], [body_diameter/2, 0], [body_diameter/2, -h1], [body_diameter/2 - wall_thickness, -h1], [body_diameter/2 - wall_thickness, 0], [bell_diameter/2, h2 - top_thickness] ]);
}
spoke_count = BLDC_bell_spokes(type);
if (spoke_count % 4 == 0) {
r = body_diameter > 40 ? body_diameter / 15 : 2.5;
for (a = [0, 90, 180, 270])
rotate(a) {
cutout(bell_diameter + 2 * r, body_diameter, r, h2);
rotate(45) {
cutout(bell_diameter, body_diameter, r, h2);
}
}
} else {
r1 = bell_diameter * PI / (spoke_count * 3);
r2 = body_diameter * PI / (spoke_count * 3);
for (i = [0 : 1 : spoke_count - 1])
rotate(i * 360 / spoke_count)
cutout2(bell_diameter, r1, body_diameter, r2, h2);
}
} // end difference
} // end translate
if (BLDC_boss_height(type))
translate_z(height)
tube(or = BLDC_boss_diameter(type)/2, ir = BLDC_shaft_diameter(type)/2, h = BLDC_boss_height(type), center = false);
if (BLDC_prop_shaft_diameter(type))
translate_z(height + BLDC_boss_height(type)) {
thread_diameter = BLDC_prop_shaft_thread_diameter(type);
unthreaded_length = BLDC_prop_shaft_length(type) - BLDC_prop_shaft_thread_length(type);
cylinder(d=BLDC_prop_shaft_diameter(type), h = unthreaded_length);
translate_z(unthreaded_length)
if (show_threads)
male_metric_thread(thread_diameter, metric_coarse_pitch(thread_diameter), BLDC_prop_shaft_thread_length(type), center = false);
else
cylinder(d = thread_diameter, h = BLDC_prop_shaft_thread_length(type));
}
} // end colour
color(side_colour)
translate_z(height - h2 - h1 -side_length)
tube(body_diameter/2, body_diameter/2 - wall_thickness, side_length, center = false);
if (show_threads)
translate_z(height)
BLDC_bell_screw_positions(type)
vflip()
female_metric_thread(BLDC_bell_hole_diameter(type), metric_coarse_pitch(BLDC_bell_hole_diameter(type)), h2, center = false, colour = body_colour);
} // end module bell
base();
bell();
color(bldc_shaft_colour)
translate_z(-BLDC_shaft_offset(type) - eps)
not_on_bom()
rod(d = BLDC_shaft_diameter(type), l = BLDC_shaft_length(type), center = false);
}
module BLDC_screw_positions(holes, n = 4) { //! Screw positions utility function
hole_count = is_list(holes) ? len(holes) : 4;
for($i = [0 : min(n, hole_count) - 1]) {
spacing = is_list(holes) ? holes[$i] : holes;
rotate($i * 360 / hole_count)
translate([spacing / 2, 0])
rotate(-$i * 90)
children();
}
}
module BLDC_base_screw_positions(type, n = 4) { //! Positions children at the base screw holes
if (BLDC_base_holes(type))
rotate(is_list(BLDC_base_holes(type)) && len(BLDC_base_holes(type)) == 3 ? 180 : 45)
BLDC_screw_positions(BLDC_base_holes(type), n)
children();
}
module BLDC_bell_screw_positions(type, n = 4) { //! Positions children at the bell screw holes
if (BLDC_bell_holes(type))
rotate(is_list(BLDC_bell_holes(type)) && len(BLDC_bell_holes(type)) == 3 ? 30 : 0)
BLDC_screw_positions(BLDC_bell_holes(type), n)
children();
}

37
vitamins/bldc_motors.scad Normal file
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@@ -0,0 +1,37 @@
//
// NopSCADlib Copyright Chris Palmer 2021
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
//
// Brushless DC electric motors
//
// shaft shaft shaft body base holes base side bell holes boss prop shaft thread
// diameter height diam length offset colour diam h1 h2 diam position open wire colour diam h1 h1 d pos spokes d h length diam length diam
BLDC0603 = ["BLDC0603", 9.0, 8, 1, 15.5, 1, crimson, 10, 1, 1.5, 1.4, [6,6,6], true, 0.8, grey(20), 9, 1, 1, 0, 0, 5, 0, 0, 0, 0, 0, 0];
BLDC0802 = ["BLDC0802", 11.5, 9.5, 1.5, 12, 0.5, grey(20), 9, 1, 2, 1.6, [6,6,6], true, 1.0, grey(20), 11, 2, 0.75, 0, 0, 3, 0, 0, 0, 0, 0, 0];
BLDC1105 = ["BLDC1105", 14.0, 11.75, 1.5, 11, 0, grey(90), 12.5, 1.6, 1.4, 2, 9, true, 1.0, grey(90), 12, 1, 1, 2, [5,5], 4, 0, 0, 0, 0, 0, 0];
BLDC1306 = ["BLDC1306", 17.75, 14.5, 2, 14, 0, crimson, 16, 1.5, 1, 2, 12, false, 1.0, grey(20), 12, 1, 1, 0, 0, 6, 8, 1, 11.5, 5, 6.5, 5];
BLDC1804 = ["BLDC1804", 23.0, 12, 2, 11, 0, grey(20), 19, 2.5, 1.5, 2, 12, false, 1.5, grey(20), 18, 1, 2.5, 0, 0, 6, 9, 1, 12, 5, 6, 5];
BLDC2205 = ["BLDC2205", 28.0, 17.25, 3, 16, 0, crimson, 26, 2, 3, 3, [19,16,19,16], false, 1.6, grey(20), 22.5, 1, 3.75, 0, 0, 6, 0, 0, 14, 5, 9, 5];
BLDC2212 = ["BLDC2212", 28.0, 27, 3, 26, 0, grey(20), 23, 4, 2, 3, [19,16,19,16], false, 2.0, grey(20), 18, 2, 4, 0, 0, 6, 0, 0, 14, 8, 7, 6];
BLDC3548 = ["BLDC3548", 35.0, 45, 5, 65.5, 1, gold, 32, 7, 1, 3, [25,19,25,19], false, 3.0, grey(20), 32, 2, 4,2.5, [16,16,16],6,12, 3.4, 0, 0, 0, 0];
BLDC4250 = ["BLDC4250", 42.5, 48, 5, 70, 20, crimson, 38, 4, 6, 3, 25, false, 3.5, grey(20), 28, 3, 6, 3, 17, 8, 12, 2, 0, 0, 0, 0];
bldc_motors = [BLDC0603, BLDC0802, BLDC1105, BLDC1306, BLDC1804, BLDC2205, BLDC2212, BLDC3548, BLDC4250];
use <bldc_motor.scad>