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SBC_Case_Builder/lib/standoff.scad

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/*
This file is part of SBC Case Builder https://github.com/hominoids/SBC_Case_Builder
Copyright 2022,2023,2024 Edward A. Kisiel hominoid@cablemi.com
This program 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.
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 this program. If not, see <http://www.gnu.org/licenses/>
Code released under GPLv3: http://www.gnu.org/licenses/gpl.html
*/
/*
NAME: standoff
DESCRIPTION: create standoffs
TODO: none
USAGE: standoff(stand_off, mask)
stand_off[size, diameter, height, holesize, supportsize, supportheight, sink, pillarstyle,
pillarsupport, reverse, insert_e, i_dia, i_depth], mask)
size = "m2_tap","m2","m2+","m2.5_tap","m2.5","m2.5+","m3_tap","m3","m3+","m4_tap","m4","m4+","custom"
diameter = pillar diameter
height = total height
holesize = hole diameter
supportsize = support size for sink
supportheight = height of support for sink
sink = none, countersunk, recessed, nut holder, blind
pillarstyle = hex, round
pillarsupport = none, left, rear, front, right
reverse = true or false
insert_e = true or false
i_dia = insert diameter
i_depth = insert hole depth
mask[0] = enablemask
mask[1] = mlength
mask[2] = msetback
mask[3] = mstyle
*/
module standoff(stand_off, mask){
size = stand_off[0];
diameter = size == "m2_tap" || size == "m2" || size == "m2+" ? 4 :
size == "m2.5_tap" || size == "m2.5" || size == "m2.5+" ? 4 :
size == "m3_tap" || size == "m3" || size == "m3+" ? 5 :
size == "m4_tap" || size == "m4" || size == "m4+" ? 6 : stand_off[1];
height = stand_off[2];
holesize = size == "m2_tap" ? 1.6 : size == "m2" ? 2 : size == "m2+" ? 2.26 :
size == "m2.5_tap" ? 2.05 : size == "m2.5" ? 2.5 : size == "m2.5+" ? 2.83 :
size == "m3_tap" ? 2.5 : size == "m3" ? 3 : size == "m3+" ? 3.4 :
size == "m4_tap" ? 3.3 : size == "m4" ? 4 : size == "m4+" ? 4.4 : stand_off[3];
supportsize = stand_off[4];
supportheight = stand_off[5];
sink = stand_off[6];
pillarstyle = stand_off[7];
pillarsupport = stand_off[8];
reverse = stand_off[9];
insert_e = stand_off[10];
i_dia = stand_off[11];
i_depth = stand_off[12];
enablemask = mask[0];
mlength = mask[1];
msetback = mask[2];
mstyle = mask[3];
ps = size == "m2_tap" || size == "m2" || size == "m2+" ? 4 :
size == "m2.5_tap" || size == "m2.5" || size == "m2.5+" ? 5 :
size == "m3_tap" || size == "m3" || size == "m3+" ? 6.72 :
size == "m4_tap" || size == "m4" || size == "m4+" ? 8.96 : (2*holesize)+.5;
ds = size == "m2_tap" || size == "m2" || size == "m2+" ? 1.2 :
size == "m2.5_tap" || size == "m2.5" || size == "m2.5+" ? 1.5 :
size == "m3_tap" || size == "m3" || size == "m3+" ? 1.86 :
size == "m4_tap" || size == "m4" || size == "m4+" ? 2.48 : holesize*.465;
adj = 0.1;
$fn = 90;
if(enablemask == true && mstyle == "default") {
if(reverse == true) {
translate([0,0,-msetback-adj]) cylinder(d=supportsize-2*adj,h=mlength);
}
else {
translate([0,0,-mlength+msetback+adj]) cylinder(d=supportsize-2*adj,h=mlength);
}
}
if(enablemask == false) {
difference (){
union () {
if(pillarstyle == "hex" && reverse == false) {
rotate([0,0,30]) cylinder(d=diameter*2/sqrt(3), h=height, $fn=6);
}
if(pillarstyle == "hex" && reverse == true) {
translate([0,0,-height]) rotate([0,0,30]) cylinder(d=diameter*2/sqrt(3), h=height, $fn=6);
}
if(pillarstyle == "round" && reverse == false) {
cylinder(d=diameter, h=height);
}
if(pillarstyle == "round" && reverse == true) {
translate([0,0,-height]) cylinder(d=diameter, h=height);
}
if(reverse == true) {
translate([0,0,-supportheight]) cylinder(d=supportsize, h=supportheight);
}
else {
cylinder(d=(supportsize),h=supportheight);
}
if(pillarsupport == "rear" && reverse == true) {
translate([-1,-supportsize/2,-height]) cube([2, supportsize/2, height]);
}
if(pillarsupport == "rear" && reverse == false) {
translate([-1,-supportsize/2,0]) cube([2, supportsize/2, height]);
}
if(pillarsupport == "front" && reverse == true) {
translate([-1,0,-height]) cube([2, supportsize/2, height]);
}
if(pillarsupport == "front" && reverse == false) {
translate([-1,0,0]) cube([2, supportsize/2, height]);
}
if(pillarsupport == "left" && reverse == true) {
translate([-supportsize/2,-1,-height]) cube([supportsize/2, 2, height]);
}
if(pillarsupport == "left" && reverse == false) {
translate([-supportsize/2,-1,0]) cube([supportsize/2, 2, height]);
}
if(pillarsupport == "right" && reverse == true) {
translate([0,-1,-height]) cube([supportsize/2, 2, height]);
}
if(pillarsupport == "right" && reverse == false) {
translate([0,-1,0]) cube([supportsize/2, 2, height]);
}
}
// hole
if(sink == "none" && reverse == false) {
translate([0,0,-adj]) cylinder(d=holesize, h=height+(adj*2));
}
if(sink != "blind" && reverse == false) {
translate([0,0,-adj]) cylinder(d=holesize, h=height+(adj*2));
}
if(sink != "blind" && reverse == true) {
translate([0,0,-adj-height]) cylinder(d=holesize, h=height+(adj*2));
}
// countersink hole
if(sink == "countersunk" && reverse == false) {
translate([0,0,-adj]) cylinder(d1=ps, d2=holesize, h=ds);
}
if(sink == "countersunk" && reverse == true) {
translate([0,0,+adj-ds]) cylinder(d1=holesize, d2=ps, h=ds);
}
// recessed hole
if(sink == "recessed" && reverse == false) {
translate([0,0,-adj]) cylinder(d=6.5, h=supportheight-2);
}
if(sink == "recessed" && reverse == true) {
translate([0,0,+adj-supportheight+2]) cylinder(d=6.5, h=supportheight-2);
}
// nut holder
if(sink == "nut holder" && reverse == false) {
translate([0,0,-adj]) cylinder(d=ps*2/sqrt(3),h=ds,$fn=6);
}
if(sink == "nut holder" && reverse == true) {
translate([0,0,+adj-ds]) cylinder(d=ps*2/sqrt(3),h=ds,$fn=6);
}
// blind hole
if(sink == "blind" && reverse == false) {
translate([0,0,2]) cylinder(d=holesize, h=height);
}
if(sink == "blind" && reverse == true) {
translate([0,0,-height-2-adj]) cylinder(d=holesize, h=height);
}
if(insert_e == true && reverse == false) {
translate([0,0,height-i_depth]) cylinder(d=i_dia, h=i_depth+adj);
}
if(insert_e == true && reverse == true) {
translate([0,0,-height-adj]) cylinder(d=i_dia, h=i_depth+adj);
}
}
}
}
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