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Fixed interior/internal inconsistency. Added internal option to most threaded rods.

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Revar Desmera
2019-06-13 16:08:06 -07:00
parent dc7a8a2203
commit a38441a548
1 changed files with 26 additions and 8 deletions
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34
threading.scad
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@@ -16,7 +16,7 @@ include <BOSL2/paths.scad>
// Module: thread_helix() // Module: thread_helix()
// Usage: // Usage:
// thread_helix(base_d, pitch, thread_depth, thread_angle, twist, [profile], [left_handed], [higbee], [interior]); // thread_helix(base_d, pitch, thread_depth, thread_angle, twist, [profile], [left_handed], [higbee], [internal]);
// Description: // Description:
// Creates a helical thread with optional end tapering. // Creates a helical thread with optional end tapering.
// Arguments: // Arguments:
@@ -28,18 +28,18 @@ include <BOSL2/paths.scad>
// profile = If a an asymmetrical thread profile is needed, it can be specified here. // profile = If a an asymmetrical thread profile is needed, it can be specified here.
// left_handed = If true, thread has a left-handed winding. // left_handed = If true, thread has a left-handed winding.
// higbee = Angle to taper thread ends by. // higbee = Angle to taper thread ends by.
// interior = If true, invert threads for interior threading. // internal = If true, invert threads for internal threading.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
module thread_helix(base_d, pitch, thread_depth=undef, thread_angle=15, twist=720, profile=undef, left_handed=false, higbee=60, interior=false, anchor=CENTER, spin=0, orient=UP) module thread_helix(base_d, pitch, thread_depth=undef, thread_angle=15, twist=720, profile=undef, left_handed=false, higbee=60, internal=false, anchor=CENTER, spin=0, orient=UP)
{ {
h = pitch*twist/360; h = pitch*twist/360;
r = base_d/2; r = base_d/2;
dz = thread_depth/pitch * tan(thread_angle); dz = thread_depth/pitch * tan(thread_angle);
cap = (1 - 2*dz)/2; cap = (1 - 2*dz)/2;
profile = !is_undef(profile)? profile : ( profile = !is_undef(profile)? profile : (
interior? [ internal? [
[thread_depth/pitch, -cap/2-dz], [thread_depth/pitch, -cap/2-dz],
[0, -cap/2], [0, -cap/2],
[0, +cap/2], [0, +cap/2],
@@ -53,12 +53,12 @@ module thread_helix(base_d, pitch, thread_depth=undef, thread_angle=15, twist=72
); );
pline = scale_points(profile, [1,1,1]*pitch); pline = scale_points(profile, [1,1,1]*pitch);
dir = left_handed? -1 : 1; dir = left_handed? -1 : 1;
idir = interior? -1 : 1; idir = internal? -1 : 1;
orient_and_anchor([2*r, 2*r, h], orient, anchor, spin=spin, chain=true) { orient_and_anchor([2*r, 2*r, h], orient, anchor, spin=spin, chain=true) {
difference() { difference() {
extrude_2dpath_along_spiral(pline, h=h, r=base_d/2, twist=twist*dir, $fn=segs(base_d/2), anchor=CENTER); extrude_2dpath_along_spiral(pline, h=h, r=base_d/2, twist=twist*dir, $fn=segs(base_d/2), anchor=CENTER);
down(h/2) right(r) right(interior? thread_depth : 0) zrot(higbee*dir*idir) fwd(dir*pitch/2) cube([3*thread_depth/cos(higbee), pitch, pitch], center=true); down(h/2) right(r) right(internal? thread_depth : 0) zrot(higbee*dir*idir) fwd(dir*pitch/2) cube([3*thread_depth/cos(higbee), pitch, pitch], center=true);
up(h/2) zrot(twist*dir) right(r) right(interior? thread_depth : 0) zrot(-higbee*dir*idir) back(dir*pitch/2) cube([3*thread_depth/cos(higbee), pitch, pitch], center=true); up(h/2) zrot(twist*dir) right(r) right(internal? thread_depth : 0) zrot(-higbee*dir*idir) back(dir*pitch/2) cube([3*thread_depth/cos(higbee), pitch, pitch], center=true);
} }
children(); children();
} }
@@ -564,6 +564,8 @@ module buttress_threaded_nut(
// left_handed = if true, create left-handed threads. Default = false // left_handed = if true, create left-handed threads. Default = false
// bevel = if true, bevel the thread ends. Default: false // bevel = if true, bevel the thread ends. Default: false
// starts = The number of lead starts. Default = 1 // starts = The number of lead starts. Default = 1
// internal = If true, this is a mask for making internal threads.
// slop = printer slop calibration to allow for tight fitting of parts. default=0.2
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
@@ -577,6 +579,8 @@ module metric_trapezoidal_threaded_rod(
left_handed=false, left_handed=false,
starts=1, starts=1,
bevel=false, bevel=false,
internal=false,
slop=undef,
anchor=CENTER, anchor=CENTER,
spin=0, spin=0,
orient=UP orient=UP
@@ -588,6 +592,8 @@ module metric_trapezoidal_threaded_rod(
left_handed=left_handed, left_handed=left_handed,
starts=starts, starts=starts,
bevel=bevel, bevel=bevel,
internal=internal,
slop=slop,
anchor=anchor, anchor=anchor,
spin=spin, spin=spin,
orient=orient orient=orient
@@ -654,6 +660,8 @@ module metric_trapezoidal_threaded_nut(
// starts = The number of lead starts. Default = 1 // starts = The number of lead starts. Default = 1
// left_handed = if true, create left-handed threads. Default = false // left_handed = if true, create left-handed threads. Default = false
// bevel = if true, bevel the thread ends. Default: false // bevel = if true, bevel the thread ends. Default: false
// internal = If true, this is a mask for making internal threads.
// slop = printer slop calibration to allow for tight fitting of parts. default=0.2
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
@@ -670,6 +678,8 @@ module acme_threaded_rod(
starts=1, starts=1,
left_handed=false, left_handed=false,
bevel=false, bevel=false,
internal=false,
slop=undef,
anchor=CENTER, anchor=CENTER,
spin=0, spin=0,
orient=UP orient=UP
@@ -681,6 +691,8 @@ module acme_threaded_rod(
starts=starts, starts=starts,
left_handed=left_handed, left_handed=left_handed,
bevel=bevel, bevel=bevel,
internal=internal,
slop=slop,
anchor=anchor, anchor=anchor,
spin=spin, spin=spin,
orient=orient orient=orient
@@ -749,6 +761,8 @@ module acme_threaded_nut(
// left_handed = if true, create left-handed threads. Default = false // left_handed = if true, create left-handed threads. Default = false
// bevel = if true, bevel the thread ends. Default: false // bevel = if true, bevel the thread ends. Default: false
// starts = The number of lead starts. Default = 1 // starts = The number of lead starts. Default = 1
// internal = If true, this is a mask for making internal threads.
// slop = printer slop calibration to allow for tight fitting of parts. default=0.2
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
@@ -762,6 +776,8 @@ module square_threaded_rod(
left_handed=false, left_handed=false,
bevel=false, bevel=false,
starts=1, starts=1,
internal=false,
slop=undef,
anchor=CENTER, anchor=CENTER,
spin=0, spin=0,
orient=UP orient=UP
@@ -772,6 +788,8 @@ module square_threaded_rod(
left_handed=left_handed, left_handed=left_handed,
bevel=bevel, bevel=bevel,
starts=starts, starts=starts,
internal=internal,
slop=slop,
anchor=anchor, anchor=anchor,
spin=spin, spin=spin,
orient=orient orient=orient
@@ -923,7 +941,7 @@ module pco1881_cap(wall=2, anchor=BOTTOM, spin=0, orient=UP)
down(h/2) zrot(45) { down(h/2) zrot(45) {
tube(id=28.58, wall=wall, h=11.2+wall, anchor=BOTTOM); tube(id=28.58, wall=wall, h=11.2+wall, anchor=BOTTOM);
cylinder(d=w, h=wall, anchor=BOTTOM); cylinder(d=w, h=wall, anchor=BOTTOM);
up(wall+2) thread_helix(base_d=25.5, pitch=2.7, thread_depth=1.6, thread_angle=15, twist=650, higbee=45, interior=true, anchor=BOTTOM); up(wall+2) thread_helix(base_d=25.5, pitch=2.7, thread_depth=1.6, thread_angle=15, twist=650, higbee=45, internal=true, anchor=BOTTOM);
} }
children(); children();
} }