config.scad

// ----------------------------------------------------------------------------
// Configuration of the carousel and its components.
//
// All the values beyond "---- derived" string in each of the sections should
// not be modified manually, as they are derived from the previously defined
// parameters in some way...
// ----------------------------------------------------------------------------

// Generic parameters to address consistency & interconnections of parts.
CYL_FN = 32; // BEWARE!!! set to +- 256 for STL export!
BLEED = 0.5; // overlap for union & difference operations
EASE = 0.2; // socket/pin ease for interconnecting of parts & holes

// Core defining shape of our carousel is N-faced cylinder.
// This affects most of the subsequent parameter definitions & usage.
CAROUSEL_FACE_COUNT = 6;
CAROUSEL_ESCRIBED_RADIUS = 120;
// ---- derived
CAROUSEL_INSCRIBED_RADIUS = CAROUSEL_ESCRIBED_RADIUS * cos(180/CAROUSEL_FACE_COUNT);

// Base of the carousel -> stand that holds the axle, walls, etc.
BASE_TOTAL_HEIGHT = 24;
BASE_FLOOR_THICKNESS = 4;
BASE_WALL_THICKNESS = 4;

// Face, or, a wall of the carousel "shell".
FACE_HEIGHT = 150;
FACE_HEIGHT_ROOF_START_RATIO = 0.85;    // percentage of full wall height to be skewed

FACE_THICKNESS = 5;
// size of wall struts/doorframe
BEAM_SIZE = 1.1 * FACE_THICKNESS;

// ---- derived
FACE_WIDTH = CAROUSEL_ESCRIBED_RADIUS * 2 * sin(180/CAROUSEL_FACE_COUNT);
FACE_ANGLE = (1 - 2/CAROUSEL_FACE_COUNT)*180;
FACE_APOTHEM_LEN = FACE_WIDTH / (2 * tan(180/CAROUSEL_FACE_COUNT));
FACE_DOOR_HEIGHT = 0.66 * FACE_HEIGHT;
FACE_DOOR_WIDTH = 0.75 * FACE_WIDTH;

// Roof of the carousel.
ROOF_THICKNESS = 1;
ROOF_HEIGHT = 50;

// Ball bearing - real-life dimensions of ball bearing used to "power" the axle.
BEARING_DIAM_OUTER = 32;
BEARING_DIAM_INNER = 15;
BEARING_HEIGHT_BOTTOM = 8;
BEARING_HEIGHT_TOP = 5;
BEARING_SHELL_THICKNESS = 1;
BEARING_SHELL_BOTTOM = 3;
BEARING_SHELL_TOP = 7;

BEARING_PEG_OVERRUN = BEARING_HEIGHT_TOP;

// Axle rotating inside carousel.
AXLE_RADIUS = FACE_THICKNESS;

// Rotating rig carrying the seats.
RIG_HEIGHT = 6;
RIG_STR = 6;

RIG_NUT_SIZE = 10;  // 4 for M4 nut, 10 for M10 nut, etc.
RIG_NUT_WALL = 3;   // thickness of the wall around hole to carry nut

// Abstract "rings" carrying seats, and their distance off the carousel center
// as a fraction of radius.
RIG_RING_POSITIONS = [0.4, 0.8];
RIG_MAX_R = 0.90 * CAROUSEL_INSCRIBED_RADIUS;

COLOR_WALL = "BurlyWood";
COLOR_STRUTS = "SaddleBrown";
COLOR_BASE = "DarkGray";
COLOR_ROOF = "DarkSeaGreen";
COLOR_AXLE = "SaddleBrown";