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78 lines
3.3 KiB
OpenSCAD
78 lines
3.3 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2018
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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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//! Nuts for leadscrews.
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//
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include <../utils/core/core.scad>
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use <../utils/tube.scad>
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use <../utils/thread.scad>
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function leadnut_bore(type) = type[2]; //! Thread size
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function leadnut_od(type) = type[3]; //! Outer diameter of the shank
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function leadnut_height(type) = type[4]; //! Total height
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function leadnut_flange_dia(type) = type[5]; //! Flange diameter
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function leadnut_flange_t(type) = type[6]; //! Flange thickness
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function leadnut_flange_offset(type) = type[7]; //! Offset of the flange from the top
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function leadnut_holes(type) = type[8]; //! The number of screw holes
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function leadnut_hole_dia(type) = type[9]; //! The diameter of the screw holes
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function leadnut_hole_pitch(type) = type[10]; //! The radia pitch of the screw holes
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function leadnut_screw(type) = type[11]; //! The type of the fixing screws
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function leadnut_pitch(type) = type[12]; //! Screw pitch
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function leadnut_lead(type) = type[13]; //! Screw lead
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function leadnut_shank(type) = leadnut_height(type) - leadnut_flange_t(type) - leadnut_flange_offset(type); //! The length of the shank below the flange
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module leadnut_screw_positions(type) { //! Position children at the screw holes
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holes = leadnut_holes(type);
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for(i = [0 : holes - 1], a = i * 360 / holes + 180)
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rotate(a)
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translate([leadnut_hole_pitch(type), 0, leadnut_flange_t(type)])
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rotate(45)
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children();
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}
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module leadnut(type) { //! Draw specified leadnut
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vitamin(str("leadnut(", type[0], "): ", type[1]));
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bore_d = leadnut_bore(type);
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bore_r = bore_d / 2;
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h = leadnut_height(type);
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pitch = leadnut_pitch(type);
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lead = leadnut_lead(type);
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color("dimgrey") vflip()
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translate_z(-leadnut_flange_offset(type) - leadnut_flange_t(type)) {
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tube(or = leadnut_od(type) / 2, ir = bore_r, h = h, center = false);
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if(show_threads)
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thread(bore_d, lead, h, thread_profile(pitch / 2, pitch * 0.366, 30), false, starts = lead / pitch, female = true, solid = false);
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translate_z(leadnut_flange_offset(type))
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linear_extrude(leadnut_flange_t(type))
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difference() {
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circle(d = leadnut_flange_dia(type));
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circle(bore_r);
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leadnut_screw_positions(type)
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circle(d = leadnut_hole_dia(type));
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}
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}
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}
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