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184 lines
2.6 KiB
OpenSCAD
184 lines
2.6 KiB
OpenSCAD
// Copyright 2010 D1plo1d
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// This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
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//testNutsAndBolts();
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module SKIPtestNutsAndBolts()
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{
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$fn = 360;
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translate([0,15])nutHole(3, proj=2);
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boltHole(3, length= 30, proj=2);
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}
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MM = "mm";
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INCH = "inch"; //Not yet supported
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//Based on: http://www.roymech.co.uk/Useful_Tables/Screws/Hex_Screws.htm
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METRIC_NUT_AC_WIDTHS =
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[
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-1, //0 index is not used but reduces computation
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-1,
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-1,
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6.40,//m3
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8.10,//m4
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9.20,//m5
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11.50,//m6
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-1,
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15.00,//m8
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-1,
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19.60,//m10
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-1,
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22.10,//m12
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-1,
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-1,
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-1,
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27.70,//m16
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-1,
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-1,
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-1,
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34.60,//m20
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-1,
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-1,
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-1,
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41.60,//m24
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-1,
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-1,
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-1,
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-1,
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-1,
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53.1,//m30
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-1,
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-1,
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-1,
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-1,
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-1,
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63.5//m36
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];
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METRIC_NUT_THICKNESS =
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[
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-1, //0 index is not used but reduces computation
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-1,
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-1,
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2.40,//m3
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3.20,//m4
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4.00,//m5
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5.00,//m6
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-1,
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6.50,//m8
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-1,
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8.00,//m10
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-1,
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10.00,//m12
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-1,
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-1,
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-1,
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13.00,//m16
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-1,
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-1,
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-1,
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16.00//m20
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-1,
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-1,
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-1,
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19.00,//m24
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-1,
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-1,
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-1,
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-1,
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-1,
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24.00,//m30
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-1,
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-1,
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-1,
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-1,
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-1,
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29.00//m36
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];
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COURSE_METRIC_BOLT_MAJOR_THREAD_DIAMETERS =
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[//based on max values
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-1, //0 index is not used but reduces computation
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-1,
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-1,
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2.98,//m3
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3.978,//m4
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4.976,//m5
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5.974,//m6
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-1,
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7.972,//m8
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-1,
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9.968,//m10
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-1,
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11.966,//m12
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-1,
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-1,
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-1,
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15.962,//m16
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-1,
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-1,
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-1,
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19.958,//m20
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-1,
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-1,
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-1,
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23.952,//m24
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-1,
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-1,
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-1,
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-1,
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-1,
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29.947,//m30
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-1,
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-1,
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-1,
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-1,
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-1,
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35.940//m36
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];
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module nutHole(size, units=MM, tolerance = +0.0001, proj = -1)
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{
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//takes a metric screw/nut size and looksup nut dimensions
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radius = METRIC_NUT_AC_WIDTHS[size]/2+tolerance;
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height = METRIC_NUT_THICKNESS[size]+tolerance;
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if (proj == -1)
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{
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cylinder(r= radius, h=height, $fn = 6, center=[0,0]);
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}
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if (proj == 1)
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{
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circle(r= radius, $fn = 6);
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}
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if (proj == 2)
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{
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translate([-radius/2, 0])
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square([radius*2, height]);
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}
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}
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module boltHole(size, units=MM, length, tolerance = +0.0001, proj = -1)
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{
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radius = COURSE_METRIC_BOLT_MAJOR_THREAD_DIAMETERS[size]/2+tolerance;
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//TODO: proper screw cap values
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capHeight = METRIC_NUT_THICKNESS[size]+tolerance; //METRIC_BOLT_CAP_HEIGHTS[size]+tolerance;
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capRadius = METRIC_NUT_AC_WIDTHS[size]/2+tolerance; //METRIC_BOLT_CAP_RADIUS[size]+tolerance;
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if (proj == -1)
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{
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translate([0, 0, -capHeight])
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cylinder(r= capRadius, h=capHeight);
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cylinder(r = radius, h = length);
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}
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if (proj == 1)
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{
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circle(r = radius);
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}
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if (proj == 2)
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{
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translate([-capRadius/2, -capHeight])
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square([capRadius*2, capHeight]);
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square([radius*2, length]);
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}
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}
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