115 lines
4.4 KiB
OpenSCAD
115 lines
4.4 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2019
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! Geared tin can steppers
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//
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include <../utils/core/core.scad>
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use <../utils/rounded_cylinder.scad>
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use <../utils/round.scad>
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function gs_diameter(type) = type[2]; //! Can diameter
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function gs_height(type) = type[3]; //! Can height
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function gs_pitch(type) = type[4]; //! Screw pitch
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function gs_lug_w(type) = type[5]; //! Screw lug width
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function gs_lug_t(type) = type[6]; //! Screw lug thickness
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function gs_hole_d(type) = type[7]; //! Screw hole diameter
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function gs_offset(type) = type[8]; //! Offset of the shaft from the centre of the can
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function gs_boss_d(type) = type[9]; //! Boss around the shaft diameter
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function gs_boss_h(type) = type[10]; //! Boss around the shaft height
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function gs_shaft_d(type) = type[11]; //! Shaft diameter
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function gs_shaft_flat(type) = type[12]; //! Shaft width across the flats
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function gs_shaft_length(type) = type[13]; //! Shaft length
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function gs_flat_length(type) = type[14]; //! Shaft flat length
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function gs_bulge_w(type) = type[15]; //! Plastic bulge width
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function gs_bulge_d(type) = type[16]; //! Plastic bulge depth from centre
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function gs_bulge_h(type) = type[17]; //! Plastic bulge height
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function gs_bulge2_w(type) = type[18]; //! Plastic rear bulge width
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function gs_bulge2_d(type) = type[19]; //! Plastic rear bulge depth from centre
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function gs_bulge2_h(type) = type[20]; //! Plastic rear bulge height
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module geared_stepper_screw_positions(type) //! Place children at the screw positions
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for(side = [-1, 1])
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translate([side * gs_pitch(type) / 2, -gs_offset(type)])
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children();
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module geared_stepper(type) { //! Draw the specified geared stepper
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vitamin(str("geared_stepper(", type[0], "): Geared stepper - ", type[1]));
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radius = gs_diameter(type) / 2;
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height = gs_height(type);
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offset = gs_offset(type);
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color("silver") {
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translate([0, -offset])
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rounded_cylinder(r = radius, h = height, r2 = 1);
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cylinder(d = gs_boss_d(type), h = 2 * gs_boss_h(type), center = true);
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linear_extrude(gs_lug_t(type))
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difference() {
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hull()
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geared_stepper_screw_positions(type)
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circle(d = gs_lug_w(type));
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geared_stepper_screw_positions(type)
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circle(d = gs_hole_d(type));
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}
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translate([0, -offset - radius, eps])
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cube([gs_bulge_w(type) - 2, 2 * (gs_bulge_d(type) - radius) - 2, 2 * eps], center = true);
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}
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vflip()
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color(brass) {
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d = gs_shaft_d(type);
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h = gs_shaft_length(type);
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linear_extrude(h)
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intersection() {
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circle(d = d);
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square([d + 1, gs_shaft_flat(type)], center = true);
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}
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cylinder(d = d, h = h - gs_flat_length(type));
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}
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color("skyblue") {
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h1 = gs_bulge_h(type);
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translate([0, - offset - radius, eps])
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rounded_rectangle([gs_bulge_w(type), 2 * (gs_bulge_d(type) - radius), h1], 0.5, center = false);
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h2 = gs_bulge2_h(type);
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translate([0, - offset, h1 + 1 - h2])
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linear_extrude(h2)
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round(0.5)
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intersection() {
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circle(gs_bulge2_d(type));
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translate([0, -50])
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square([gs_bulge2_w(type), 100], center = true);
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}
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}
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translate_z(2.5)
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for(i = [0 : 4])
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translate([i - 2.5, 0])
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rotate([90, 0, 0])
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color(["yellow", "orange", "red", "pink", "blue"][i])
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cylinder(d = 1, h = radius + offset + 10);
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}
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