NopSCADlib/vitamins/variac.scad

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//
// NopSCADlib Copyright Chris Palmer 2018
// 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/>.
//
//
//! Variable auto transformers.
//
include <../utils/core/core.scad>
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use <screw.scad>
function variac_diameter(type) = type[2]; //! Body diameter
function variac_height(type) = type[3]; //! Body height
function variac_bulge_dia(type) = type[4]; //! Bulge to opposite edge
function variac_bulge_width(type) = type[5]; //! Width of the bulge
function variac_shaft_dia(type) = type[6]; //! Shaft diameter
function variac_shaft_length(type) = type[7]; //! Shaft length
function variac_screws(type) = type[8]; //! Number of screws
function variac_screw_pitch(type) = type[9]; //! Pitch of screws
function variac_screw(type) = type[10]; //! Screw type
function variac_dial_dia(type) = type[11]; //! Dial diameter
function variac_dial_thickness(type) = type[12]; //! Dial thickness
function variac_dial_hole_pitch(type)= type[13] ? type[13] : variac_screw_pitch(type); //! Screw pitch for the dial
function variac_dial_hole_r(type) = type[14] ? type[14] : screw_clearance_radius(variac_screw(type)); //! Dial screw hole radius
function variac_dial_big_hole(type) = type[15] ? type[15] : variac_shaft_dia(type) + 2; //! Central dial hole diameter
function variac_radius(type) = variac_diameter(type) / 2; //! Body radius
module variac_hole_positions(type, pitch = undef) //! Position children at the screw positions
for(i = [0 : variac_screws(type) - 1])
rotate(360 * (i + 0.5) / variac_screws(type) - 90)
translate([pitch ? pitch : variac_screw_pitch(type), 0])
children();
module variac_holes(type, h = 100) { //! Drill panel holes for specified variac
variac_hole_positions(type)
drill(screw_clearance_radius(variac_screw(type)), h);
drill(variac_shaft_dia(type) / 2 + 1, h);
}
module variac_dial(type) //! Draw the dial for the specified variac
color("silver") linear_extrude(variac_dial_thickness(type))
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difference() {
circle(d = variac_dial_dia(type));
circle(variac_dial_big_hole(type) / 2);
variac_hole_positions(type, variac_dial_hole_pitch(type))
circle(variac_dial_hole_r(type));
}
module variac(type, thickness = 3, dial = true) { //! Draw the specified variac with screws and possibly the dial when it is fixed and not rotating
vitamin(str("variac(", type[0], ", 3): Variac ", type[1]));
dia = variac_diameter(type);
w = variac_bulge_width(type);
h = variac_height(type);
bulge_r = variac_bulge_dia(type) - dia / 2;
module shape() {
circle(d = dia);
translate([-w / 2, -bulge_r])
square([w, bulge_r]);
}
translate_z(-h) {
color("#A66955") {
linear_extrude(h)
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difference() {
shape();
variac_hole_positions(type)
circle(screw_radius(variac_screw(type)));
}
linear_extrude(h - 10)
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shape();
}
color("silver")
translate_z(1)
cylinder(d = variac_shaft_dia(type), h = h + variac_shaft_length(type) - 1);
if(dial)
translate_z(thickness + h)
variac_dial(type);
translate_z(thickness + h + (dial ? variac_dial_thickness(type) : 0))
not_on_bom()
variac_hole_positions(type)
screw_and_washer(variac_screw(type), 16);
}
}