OpenSCAD::MCAD

If you have downloaded the latest Development Snapshot, the application folder will contain the MCAD library:

There are several files within the MCAD folder:

In order to use an MCAD file, you need to specify which file in the first lines of your OpenSCAD file:

use <MCAD/boxes.scad>
roundedBox([30, 30, 40], 5, true);

bearing.scad

test_bearing() displays a 608 bearing inside a test_bearing_hole.

test_bearing_hole() displays a a cube (size=[30, 30, 7-10*epsilon] ) to hold a bearing.

bearingDimensions(model) Sets the dimensions for the following bearing numbers. 608 (Skatebearing) is the model default.
608 = [8*mm, 22*mm, 7*mm]
623 = [3*mm, 10*mm, 4*mm]
624 = [4*mm, 13*mm, 5*mm]
627 = [7*mm, 22*mm, 7*mm]
688 = [8*mm, 16*mm, 4*mm]
698 = [8*mm, 19*mm, 6*mm]

bearing(pos=[0,0,0], angle=[0,0,0], model=SkateBearing, outline=false, material=Steel, sideMaterial=Brass)

example

bearing([0,0,10],[90,0,0]);

boxes.scad

roundedBox([width, height, depth], float radius, bool sidesonly)

example

roundedBox([20, 30, 40], 5, true)

gridbeam.scad

zBeam(segments) create a vertical gridbeam strut 'segments' long

xBeam(segments) create a horizontal gridbeam strut along the X axis

yBeam(segments) create a horizontal gridbeam strut along the Y axis

topShelf(width, depth, corners) create a shelf suitable for use in gridbeam structures width and depth in 'segments', corners == 1 notches corners

bottomShelf(width, depth, corners) like topShelf, but aligns shelf to underside of beams

backBoard(width, height, corners) create a backing board suitable for use in gridbeam structures width and height in 'segments', corners == 1 notches corners

frontBoard(width, height, corners) like backBoard, but aligns board to front side of beams

translateBeam([x, y, z]) translate gridbeam struts or shelves in X, Y, or Z axes in units 'segments'

example

xBeam(3)

metric_fastners.scad

cap_bolt(dia,len)

csk_bolt(dia,len)

washer(dia)

flat_nut(dia)

bolt(dia,len)

cylinder_chamfer(r1,r2)

chamfer(len,r)

example

translate([-20,0,0])
csk_bolt(3,14);
translate([-10,0,0])
washer(3);
translate([0,0,0])
flat_nut(3);

translate([10,0,0])
bolt(4,14);
translate([-15,-12,0])
cylinder_chamfer(8,1);
translate([0,-15,0])
chamfer(10,2);

motors.scad

example

//

regular_shapes.scad

triangle(radius);

reg_polygon(sides,radius);

hexagon(radius);

heptagon(radius);

octagon(radius);

nonagon(radius);

decagon(radius);

hendecagon(radius);

dodecagon(radius);

ellipse(width, height);

egg_outline(width, length);

cone(height, radius, center = false) ;

oval_prism(height, rx, ry, center = false) ;

oval_tube(height, rx, ry, wall, center = false) ;

cylinder_tube(height, radius, wall, center = false) ;

tubify(radius,wall);

triangle_prism(height,radius);

triangle_tube(height,radius,wall);

pentagon_prism(height,radius);

pentagon_tube(height,radius,wall);

hexagon_prism(height,radius) ;

heptagon_prism(height,radius) ;

octagon_prism(height,radius) ;

nonagon_prism(height,radius);

decagon_prism(height,radius);

hendecagon_prism(height,radius);

dodecagon_prism(height,radius);

torus(outerRadius, innerRadius);

triangle_pyramid(radius);

square_pyramid(base_x, base_y,height);

hardware.scad

rod(length, threaded)

screw(length, nutpos, washer, bearingpos = -1)

bearing(position)

nut(position, washer)

washer(position)

rodnut(position, washer)

rodwasher(position)

example

rod(20);
translate([rodsize * 2.5, 0, 0]) rod(20, true);
translate([rodsize * 5, 0, 0]) screw(10, true);
translate([rodsize * 7.5, 0, 0]) bearing();
translate([rodsize * 10, 0, 0]) rodnut();
translate([rodsize * 12.5, 0, 0]) rodwasher();
translate([rodsize * 15, 0, 0]) nut();
translate([rodsize * 17.5, 0, 0]) washer();

screw.scad

helix(pitch, length, slices=500);

auger(pitch, length, outside_diameter, inner_diameter);

test_auger();

ball_groove(pitch, length, diameter, ball_radius=10);

test_ball_groove();

ball_groove2(pitch, length, diameter, ball_radius, slices=200);

test_ball_groove2();

example

translate([-180,0,0])
auger(100, 300);

ball_groove2(100, 300, 100, 10);

translate([170,0,0])
ball_groove(100, 300, 10);

triangles.scad

triangle(o_len, a_len, depth)

a_triangle(tan_angle, a_len, depth)

example

triangle(5, 5, 5);

translate([10,0,0])
 a_triangle(30, 5, 5);

translate([20,0,0])
a_triangle(60, 5, 5);

teardrop.scad

This script generates a teardrop shape at the appropriate angle to prevent overhangs greater than 45 degrees. The angle is in degrees, and is a rotation around the Y axis. You can then rotate around Z to point it in any direction. Rotation around X or Y will cause the angle to be wrong.

teardrop(radius, length, angle)

example

teardrop(10, 10, 60);

stepper.scad

motor(model=Nema23, size=NemaMedium, dualAxis=false, pos=[0,0,0], orientation = [0,0,0])

example

rotate([0,180,0])
 motor(Nema17);

shapes.scad

box(width, height, depth);

roundedBox(width, height, depth, radius);

cone(height, radius, center = false) ;

ellipticalCylinder(w,h, height, center = false);

ellipsoid(w, h, center = false);

tube(height, radius, wall, center = false);

tube2(height, ID, OD, center = false);

ovalTube(height, rx, ry, wall, center = false);

ngon(sides, radius, center=false);

hexagon(size, height);

octagon(size, height);

dodecagon(size, height);

hexagram(size, height);

rightTriangle(adjacent, opposite, height);

equiTriangle(side, height);

12ptStar(size, height);

dislocateBox(w, h, d);

servo.scad

For the Align DS420 digital servo

alignds420(position, rotation, screws = 0, axle_lenght = 0)

example

alignds420(screws=1);

involute_gears.scad

bevel_gear_pair ( gear1_teeth = 41, gear2_teeth = 7, axis_angle = 90, outside_circular_pitch=1000)

bevel_gear ( number_of_teeth=11, cone_distance=100, face_width=20, outside_circular_pitch=1000, pressure_angle=30, clearance = 0.2, bore_diameter=5, gear_thickness = 15, backlash = 0, involute_facets=0, finish = -1)

nvolute_bevel_gear_tooth ( back_cone_radius, root_radius, base_radius, outer_radius, pitch_apex, cone_distance, half_thick_angle, involute_facets)

gear ( number_of_teeth=15, circular_pitch=false, diametral_pitch=false, pressure_angle=28, clearance = 0.2, gear_thickness=5, rim_thickness=8, rim_width=5, hub_thickness=10, hub_diameter=15, bore_diameter=5, circles=0, backlash=0, twist=0, involute_facets=0, flat=false)

gear_shape ( number_of_teeth, pitch_radius, root_radius, base_radius, outer_radius, half_thick_angle, involute_facets)

involute_gear_tooth ( pitch_radius, root_radius, base_radius, outer_radius, half_thick_angle, involute_facets)

example

gear (circular_pitch=700,
gear_thickness = 12,
rim_thickness = 15,
hub_thickness = 17,
circles=8);

involute_gears.scad
bearing.scad
boxes.scad
gridbeam.scad
hardware.scad
metric_fastners.scad
motors.scad
regular_shapes.scad
screw.scad
servo.scad
shapes.scad
stepper.scad
teardrop.scad
triangles.scad

Challenge:

Use at least one of the files of the MCAD library to create a 3D model.