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work on connectingBar

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zhao
2023-01-02 23:55:26 -05:00
parent 1b923fa215
commit 5d4252b62d
7 changed files with 197 additions and 55 deletions
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55
cases/rack2/screws.scad
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@ -1,6 +1,7 @@
/* Some common screw dimensions and helper functions/modules */
inf = 400;
include <../math.scad>
include <../common.scad>
/********************************************************************************/
// M3 dimensions
@ -8,10 +9,20 @@ m3HoleRadiusSlack = 0.15;
m3Diameter = 3.0;
m3Radius = m3Diameter / 2.0;
m3RadiusSlacked = m3Radius + m3HoleRadiusSlack;
m3HexNutWidthAcrossFlats = 5.41;
m3HexNutWidthAcrossCorners = FtoG(m3HexNutWidthAcrossFlats);
m3HexNutThickness = 2.18;
m3HeatSetInsertSlotRadiusSlack = 0.0;
m3HeatSetInsertSlotHeightSlack = 0.5;
m3HeatSetInsertSlotRadius = 2.5;
m3HeatSetInsertSlotHeight = 6;
m3HeatSetInsertSlotRadiusSlacked = m3HeatSetInsertSlotRadius+m3HeatSetInsertSlotRadiusSlack;
m3HeatSetInsertSlotHeightSlacked = m3HeatSetInsertSlotHeight+m3HeatSetInsertSlotHeightSlack;
/********************************************************************************/
// M4 dimensions
m4HoleRadiusSlack = 0.15;
@ -23,6 +34,22 @@ m4HexNutWidthAcrossCorners = FtoG(m4HexNutWidthAcrossFlats);
m4HexNutThickness = 3.07;
/********************************************************************************/
module heatSetInsertSlot_N(screwType) {
if (screwType == "m3") {
union() {
// actual slot for insert
cylinder(h = m3HeatSetInsertSlotHeightSlacked, r = m3HeatSetInsertSlotRadiusSlacked);
// extra space above slot to help with insertion
translate(v=[0, 0, m3HeatSetInsertSlotHeightSlacked])
cylinder(h = inf50, r = 1.3*m3HeatSetInsertSlotRadiusSlacked);
}
} else {
error("Unsupported screw type");
}
}
function screwRadiusSlacked(screwType) =
(screwType == "m3")
? m3RadiusSlacked
@ -30,45 +57,35 @@ function screwRadiusSlacked(screwType) =
? m4RadiusSlacked
: error("Unsupported screw type");
module hexNutPocket_N(screwType) {
if (screwType == "m3") {
hexNutPocketHelper_N(m3RadiusSlacked,
m3HexNutWidthAcrossCorners / 2 + 0.1,
m3HexNutThickness + 0.2);
hexNutPocketHelper_N(m3RadiusSlacked, m3HexNutWidthAcrossCorners / 2 + 0.1, m3HexNutThickness + 0.2);
} else if (screwType == "m4") {
hexNutPocketHelper_N(m4RadiusSlacked,
m4HexNutWidthAcrossCorners / 2 + 0.1,
m4HexNutThickness + 0.2);
hexNutPocketHelper_N(m4RadiusSlacked, m4HexNutWidthAcrossCorners / 2 + 0.1, m4HexNutThickness + 0.2);
} else {
error("Unsupported screw type");
}
}
module hexNutPocketHelper_N(
innerRadius,
widthAcrossCorners,
thickness)
{
module hexNutPocketHelper_N(innerRadius, widthAcrossCorners, thickness) {
union() {
hull() {
// hexagonal cylinder representing where the nut should fit
cylinder(r = widthAcrossCorners, h = thickness, center = true, $fn = 6);
// negative volume for sliding in the nut
translate(v = [inf, 0, 0])
translate(v = [inf50, 0, 0])
cylinder(r = widthAcrossCorners, h = thickness, center = true, $fn = 6);
}
// negative volume for screw lead
translate(v = [0, 0, - 10])
cylinder(r = innerRadius, h = inf, $fn = 32);
cylinder(r = innerRadius, h = inf50, $fn = 32);
hull() {
translate(v = [inf, 0, 0])
cylinder(r = innerRadius, h = inf, $fn = 32);
cylinder(r = innerRadius, h = inf, $fn = 32);
translate(v = [inf50, 0, 0])
cylinder(r = innerRadius, h = inf50, $fn = 32);
cylinder(r = innerRadius, h = inf50, $fn = 32);
}
}
}