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Docs formatting and gear example image fixes.

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This commit is contained in:
Garth Minette 2020-10-19 23:52:46 -07:00
parent fc7518b343
commit 21e9dfa1bf
3 changed files with 190 additions and 187 deletions
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371
involute_gears.scad
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@ -174,16 +174,16 @@ function _gear_q7(f,r,b,r2,t,s) = _gear_q6(b,s,t,(1-f)*max(b,r)+f*r2); //
// Example(2D): // Example(2D):
// gear_tooth_profile(pitch=5, teeth=20, pressure_angle=20, valleys=false); // gear_tooth_profile(pitch=5, teeth=20, pressure_angle=20, valleys=false);
// Example(2D): As a function // Example(2D): As a function
// stroke(gear_tooth_profile(pitch=5, teeth=20, pressure_angle=20, valleys=false)); // stroke(gear_tooth_profile(pitch=5, teeth=20, pressure_angle=20, valleys=false), width=0.1);
function gear_tooth_profile( function gear_tooth_profile(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
pressure_angle = 28, pressure_angle = 28,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
interior = false, interior = false,
valleys = true, valleys = true,
center = false center = false
) = let( ) = let(
p = pitch_radius(pitch, teeth), p = pitch_radius(pitch, teeth),
c = outer_radius(pitch, teeth, clearance, interior), c = outer_radius(pitch, teeth, clearance, interior),
@ -212,27 +212,27 @@ function gear_tooth_profile(
module gear_tooth_profile( module gear_tooth_profile(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
pressure_angle = 28, pressure_angle = 28,
backlash = 0.0, backlash = 0.0,
clearance = undef, clearance = undef,
interior = false, interior = false,
valleys = true, valleys = true,
center = false center = false
) { ) {
r = root_radius(pitch, teeth, clearance, interior); r = root_radius(pitch, teeth, clearance, interior);
translate([0,-r,0]) fwd(r)
polygon( polygon(
points=gear_tooth_profile( points=gear_tooth_profile(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
backlash = backlash, backlash = backlash,
clearance = clearance, clearance = clearance,
interior = interior, interior = interior,
valleys = valleys, valleys = valleys,
center = center center = center
) )
); );
} }
@ -269,15 +269,15 @@ module gear_tooth_profile(
// path = gear2d(pitch=8, teeth=16); // path = gear2d(pitch=8, teeth=16);
// polygon(path); // polygon(path);
function gear2d( function gear2d(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
hide = 0, hide = 0,
pressure_angle = 28, pressure_angle = 28,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
interior = false, interior = false,
anchor = CENTER, anchor = CENTER,
spin = 0 spin = 0
) = let( ) = let(
pr = pitch_radius(pitch=pitch, teeth=teeth), pr = pitch_radius(pitch=pitch, teeth=teeth),
pts = concat( pts = concat(
@ -285,13 +285,13 @@ function gear2d(
each rot(tooth*360/teeth, each rot(tooth*360/teeth,
planar=true, planar=true,
p=gear_tooth_profile( p=gear_tooth_profile(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
interior = interior, interior = interior,
valleys = false valleys = false
) )
) )
], ],
@ -301,24 +301,24 @@ function gear2d(
module gear2d( module gear2d(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
hide = 0, hide = 0,
pressure_angle = 28, pressure_angle = 28,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
interior = false, interior = false,
anchor = CENTER, anchor = CENTER,
spin = 0 spin = 0
) { ) {
path = gear2d( path = gear2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
hide = hide, hide = hide,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
interior = interior interior = interior
); );
pr = pitch_radius(pitch=pitch, teeth=teeth); pr = pitch_radius(pitch=pitch, teeth=teeth);
attachable(anchor,spin, two_d=true, r=pr) { attachable(anchor,spin, two_d=true, r=pr) {
@ -330,9 +330,9 @@ module gear2d(
// Function&Module: rack2d() // Function&Module: rack2d()
// Usage: As a Function // Usage: As a Function
// path = rack2d(pitch, teeth, base, <pressure_angle>, <backlash>); // path = rack2d(pitch, teeth, height, <pressure_angle>, <backlash>);
// Usage: As a Module // Usage: As a Module
// rack2d(pitch, teeth, base, <pressure_angle>, <backlash>); // rack2d(pitch, teeth, height, <pressure_angle>, <backlash>);
// Description: // Description:
// This is used to create a 2D rack, which is a linear bar with teeth that a gear can roll along. // This is used to create a 2D rack, which is a linear bar with teeth that a gear can roll along.
// A rack can mesh with any gear that has the same `pitch` and `pressure_angle`. // A rack can mesh with any gear that has the same `pitch` and `pressure_angle`.
@ -341,7 +341,7 @@ module gear2d(
// Arguments: // Arguments:
// pitch = The circular pitch, or distance between teeth around the pitch circle, in mm. // pitch = The circular pitch, or distance between teeth around the pitch circle, in mm.
// teeth = Total number of teeth along the rack // teeth = Total number of teeth along the rack
// base = Height of rack in mm, from tooth top to back of rack. // height = Height of rack in mm, from tooth top to back of rack.
// pressure_angle = Controls how straight or bulged the tooth sides are. In degrees. // pressure_angle = Controls how straight or bulged the tooth sides are. In degrees.
// backlash = Gap between two meshing teeth, in the direction along the circumference of the pitch circle // backlash = Gap between two meshing teeth, in the direction along the circumference of the pitch circle
// 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`
@ -350,40 +350,43 @@ module gear2d(
// "adendum" = At the tips of the teeth, at the center of rack. // "adendum" = At the tips of the teeth, at the center of rack.
// "adendum-left" = At the tips of the teeth, at the left end of the rack. // "adendum-left" = At the tips of the teeth, at the left end of the rack.
// "adendum-right" = At the tips of the teeth, at the right end of the rack. // "adendum-right" = At the tips of the teeth, at the right end of the rack.
// "dedendum" = At the base of the teeth, at the center of rack. // "dedendum" = At the height of the teeth, at the center of rack.
// "dedendum-left" = At the base of the teeth, at the left end of the rack. // "dedendum-left" = At the height of the teeth, at the left end of the rack.
// "dedendum-right" = At the base of the teeth, at the right end of the rack. // "dedendum-right" = At the height of the teeth, at the right end of the rack.
// Example(2D): // Example(2D):
// rack2d(pitch=5, teeth=10, base=5, pressure_angle=20); // rack2d(pitch=5, teeth=10, height=10, pressure_angle=20);
// Example(2D): Called as a Function // Example(2D): Called as a Function
// path = rack2d(pitch=8, teeth=8, base=5, pressure_angle=28); // path = rack2d(pitch=8, teeth=8, height=10, pressure_angle=28);
// polygon(path); // polygon(path);
function rack2d( function rack2d(
pitch = 5, pitch = 5,
teeth = 20, teeth = 20,
base = 10, height = 10,
pressure_angle = 28, pressure_angle = 28,
backlash = 0.0, backlash = 0.0,
clearance = undef, clearance = undef,
anchor = CENTER, anchor = CENTER,
spin = 0 spin = 0
) = ) =
let( let(
a = adendum(pitch), a = adendum(pitch),
d = dedendum(pitch, clearance), d = dedendum(pitch, clearance)
)
assert(a+d < height)
let(
xa = a * sin(pressure_angle), xa = a * sin(pressure_angle),
xd = d * sin(pressure_angle), xd = d * sin(pressure_angle),
l = teeth * pitch, l = teeth * pitch,
anchors = [ anchors = [
anchorpt("adendum", [0,a,0], BACK), anchorpt("adendum", [ 0, a,0], BACK),
anchorpt("adendum-left", [-l/2,a,0], LEFT), anchorpt("adendum-left", [-l/2, a,0], LEFT),
anchorpt("adendum-right", [l/2,a,0], RIGHT), anchorpt("adendum-right", [ l/2, a,0], RIGHT),
anchorpt("dedendum", [0,-d,0], BACK), anchorpt("dedendum", [ 0,-d,0], BACK),
anchorpt("dedendum-left", [-l/2,-d,0], LEFT), anchorpt("dedendum-left", [-l/2,-d,0], LEFT),
anchorpt("dedendum-right", [l/2,-d,0], RIGHT), anchorpt("dedendum-right", [ l/2,-d,0], RIGHT),
], ],
path = [ path = [
[-(teeth-1)/2 * pitch + -1/2 * pitch, a-base], [-(teeth-1)/2 * pitch + -1/2 * pitch, a-height],
[-(teeth-1)/2 * pitch + -1/2 * pitch, -d], [-(teeth-1)/2 * pitch + -1/2 * pitch, -d],
for (i = [0:1:teeth-1]) let( for (i = [0:1:teeth-1]) let(
off = (i-(teeth-1)/2) * pitch off = (i-(teeth-1)/2) * pitch
@ -394,41 +397,41 @@ function rack2d(
[off + 1/4 * pitch - backlash + xd, -d], [off + 1/4 * pitch - backlash + xd, -d],
], ],
[ (teeth-1)/2 * pitch + 1/2 * pitch, -d], [ (teeth-1)/2 * pitch + 1/2 * pitch, -d],
[ (teeth-1)/2 * pitch + 1/2 * pitch, a-base], [ (teeth-1)/2 * pitch + 1/2 * pitch, a-height],
] ]
) reorient(anchor,spin, two_d=true, size=[l,2*abs(a-base)], anchors=anchors, p=path); ) reorient(anchor,spin, two_d=true, size=[l,2*abs(a-height)], anchors=anchors, p=path);
module rack2d( module rack2d(
pitch = 5, pitch = 5,
teeth = 20, teeth = 20,
base = 10, height = 10,
pressure_angle = 28, pressure_angle = 28,
backlash = 0.0, backlash = 0.0,
clearance = undef, clearance = undef,
anchor = CENTER, anchor = CENTER,
spin = 0 spin = 0
) { ) {
a = adendum(pitch); a = adendum(pitch);
d = dedendum(pitch, clearance); d = dedendum(pitch, clearance);
l = teeth * pitch; l = teeth * pitch;
anchors = [ anchors = [
anchorpt("adendum", [0,a,0], BACK), anchorpt("adendum", [ 0, a,0], BACK),
anchorpt("adendum-left", [-l/2,a,0], LEFT), anchorpt("adendum-left", [-l/2, a,0], LEFT),
anchorpt("adendum-right", [l/2,a,0], RIGHT), anchorpt("adendum-right", [ l/2, a,0], RIGHT),
anchorpt("dedendum", [0,-d,0], BACK), anchorpt("dedendum", [ 0,-d,0], BACK),
anchorpt("dedendum-left", [-l/2,-d,0], LEFT), anchorpt("dedendum-left", [-l/2,-d,0], LEFT),
anchorpt("dedendum-right", [l/2,-d,0], RIGHT), anchorpt("dedendum-right", [ l/2,-d,0], RIGHT),
]; ];
path = rack2d( path = rack2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
base = base, height = height,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
backlash = backlash, backlash = backlash,
clearance = clearance clearance = clearance
); );
attachable(anchor,spin, two_d=true, size=[l, 2*abs(a-base)], anchors=anchors) { attachable(anchor,spin, two_d=true, size=[l, 2*abs(a-height)], anchors=anchors) {
polygon(path); polygon(path);
children(); children();
} }
@ -503,22 +506,22 @@ module rack2d(
// translate([ d13, 0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(pitch,n3,thickness,hole); // translate([ d13, 0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(pitch,n3,thickness,hole);
// translate([ d13, 0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(pitch,n3,thickness,hole); // translate([ d13, 0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(pitch,n3,thickness,hole);
// translate([-d14, 0, 0]) rotate([0,0,-($t-n4/4-n1/4+1/2-floor(n4/4)-3)*360/n4]) color([1.00,0.75,0.50]) gear(pitch,n4,thickness,hole,hide=n4-3); // translate([-d14, 0, 0]) rotate([0,0,-($t-n4/4-n1/4+1/2-floor(n4/4)-3)*360/n4]) color([1.00,0.75,0.50]) gear(pitch,n4,thickness,hole,hide=n4-3);
// translate([(-floor(n5/2)-floor(n1/2)+$t+n1/2)*9, -d1+0.0, 0]) color([0.75,0.75,0.75]) rack(pitch=pitch,teeth=n5,thickness=thickness,base=rack_base,anchor=CENTER,orient=BACK); // translate([(-floor(n5/2)-floor(n1/2)+$t+n1/2)*9, -d1+0.0, 0]) color([0.75,0.75,0.75]) rack(pitch=pitch,teeth=n5,thickness=thickness,height=rack_base,anchor=CENTER,orient=BACK);
function gear( function gear(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
thickness = 6, thickness = 6,
shaft_diam = 3, shaft_diam = 3,
hide = 0, hide = 0,
pressure_angle = 28, pressure_angle = 28,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
helical = 0, helical = 0,
slices = 2, slices = 2,
interior = false, interior = false,
anchor = CENTER, anchor = CENTER,
spin = 0, spin = 0,
orient = UP orient = UP
) = ) =
let( let(
p = pitch_radius(pitch, teeth), p = pitch_radius(pitch, teeth),
@ -527,13 +530,13 @@ function gear(
twist = atan2(thickness*tan(helical),p), twist = atan2(thickness*tan(helical),p),
rgn = [ rgn = [
gear2d( gear2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
hide = hide, hide = hide,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
interior = interior interior = interior
), ),
if (shaft_diam > 0) circle(d=shaft_diam, $fn=max(12,segs(shaft_diam/2))) if (shaft_diam > 0) circle(d=shaft_diam, $fn=max(12,segs(shaft_diam/2)))
], ],
@ -542,20 +545,20 @@ function gear(
module gear( module gear(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
thickness = 6, thickness = 6,
shaft_diam = 3, shaft_diam = 3,
hide = 0, hide = 0,
pressure_angle = 28, pressure_angle = 28,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
helical = 0, helical = 0,
slices = 2, slices = 2,
interior = false, interior = false,
anchor = CENTER, anchor = CENTER,
spin = 0, spin = 0,
orient = UP orient = UP
) { ) {
p = pitch_radius(pitch, teeth); p = pitch_radius(pitch, teeth);
c = outer_radius(pitch, teeth, clearance, interior); c = outer_radius(pitch, teeth, clearance, interior);
@ -565,13 +568,13 @@ module gear(
difference() { difference() {
linear_extrude(height=thickness, center=true, convexity=10, twist=twist) { linear_extrude(height=thickness, center=true, convexity=10, twist=twist) {
gear2d( gear2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
hide = hide, hide = hide,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
interior = interior interior = interior
); );
} }
if (shaft_diam > 0) { if (shaft_diam > 0) {
@ -638,23 +641,23 @@ module gear(
// bevel_gear(pitch=5, teeth=t1, mate_teeth=t2, slices=12, anchor="apex", orient=FWD); // bevel_gear(pitch=5, teeth=t1, mate_teeth=t2, slices=12, anchor="apex", orient=FWD);
// bevel_gear(pitch=5, teeth=t2, mate_teeth=t1, left_handed=true, slices=12, anchor="apex", spin=180/t2); // bevel_gear(pitch=5, teeth=t2, mate_teeth=t1, left_handed=true, slices=12, anchor="apex", spin=180/t2);
function bevel_gear( function bevel_gear(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
face_width = 10, face_width = 10,
pitch_angle = 45, pitch_angle = 45,
mate_teeth = undef, mate_teeth = undef,
hide = 0, hide = 0,
pressure_angle = 20, pressure_angle = 20,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
cutter_radius = 30, cutter_radius = 30,
spiral_angle = 35, spiral_angle = 35,
left_handed = false, left_handed = false,
slices = 1, slices = 1,
interior = false, interior = false,
anchor = "pitchbase", anchor = "pitchbase",
spin = 0, spin = 0,
orient = UP orient = UP
) = ) =
let( let(
slices = cutter_radius==0? 1 : slices, slices = cutter_radius==0? 1 : slices,
@ -676,14 +679,14 @@ function bevel_gear(
apts = [for (u=slice_us) radcp + polar_to_xy(cutter_radius, lerp(sang,eang,u))], apts = [for (u=slice_us) radcp + polar_to_xy(cutter_radius, lerp(sang,eang,u))],
polars = [for (p=apts) [vang(p)-90, norm(p)]], polars = [for (p=apts) [vang(p)-90, norm(p)]],
profile = gear_tooth_profile( profile = gear_tooth_profile(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
interior = interior, interior = interior,
valleys = false, valleys = false,
center = true center = true
), ),
verts1 = [ verts1 = [
for (polar=polars) [ for (polar=polars) [
@ -738,24 +741,24 @@ function bevel_gear(
module bevel_gear( module bevel_gear(
pitch = 3, pitch = 3,
teeth = 11, teeth = 11,
face_width = 10, face_width = 10,
pitch_angle = 45, pitch_angle = 45,
mate_teeth = undef, mate_teeth,
shaft_diam = 3, shaft_diam = 3,
hide = 0, hide = 0,
pressure_angle = 20, pressure_angle = 20,
clearance = undef, clearance = undef,
backlash = 0.0, backlash = 0.0,
cutter_radius = 30, cutter_radius = 30,
spiral_angle = 35, spiral_angle = 35,
left_handed = false, left_handed = false,
slices = 1, slices = 1,
interior = false, interior = false,
anchor = "pitchbase", anchor = "pitchbase",
spin = 0, spin = 0,
orient = UP orient = UP
) { ) {
slices = cutter_radius==0? 1 : slices; slices = cutter_radius==0? 1 : slices;
pitch_angle = is_undef(mate_teeth)? pitch_angle : atan(teeth/mate_teeth); pitch_angle = is_undef(mate_teeth)? pitch_angle : atan(teeth/mate_teeth);
@ -765,19 +768,19 @@ module bevel_gear(
pitchoff = (pr-rr) * cos(pitch_angle); pitchoff = (pr-rr) * cos(pitch_angle);
thickness = face_width * cos(pitch_angle); thickness = face_width * cos(pitch_angle);
vnf = bevel_gear( vnf = bevel_gear(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
face_width = face_width, face_width = face_width,
pitch_angle = pitch_angle, pitch_angle = pitch_angle,
hide = hide, hide = hide,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
clearance = clearance, clearance = clearance,
backlash = backlash, backlash = backlash,
cutter_radius = cutter_radius, cutter_radius = cutter_radius,
spiral_angle = spiral_angle, spiral_angle = spiral_angle,
left_handed = left_handed, left_handed = left_handed,
slices = slices, slices = slices,
interior = interior, interior = interior,
anchor=CENTER anchor=CENTER
); );
anchors = [ anchors = [
@ -799,9 +802,9 @@ module bevel_gear(
// Function&Module: rack() // Function&Module: rack()
// Usage: As a Module // Usage: As a Module
// rack(pitch, teeth, thickness, base, <pressure_angle>, <backlash>); // rack(pitch, teeth, thickness, height, <pressure_angle>, <backlash>);
// Usage: As a Function // Usage: As a Function
// vnf = rack(pitch, teeth, thickness, base, <pressure_angle>, <backlash>); // vnf = rack(pitch, teeth, thickness, height, <pressure_angle>, <backlash>);
// Description: // Description:
// This is used to create a 3D rack, which is a linear bar with teeth that a gear can roll along. // This is used to create a 3D rack, which is a linear bar with teeth that a gear can roll along.
// A rack can mesh with any gear that has the same `pitch` and `pressure_angle`. // A rack can mesh with any gear that has the same `pitch` and `pressure_angle`.
@ -811,7 +814,7 @@ module bevel_gear(
// pitch = The circular pitch, or distance between teeth around the pitch circle, in mm. // pitch = The circular pitch, or distance between teeth around the pitch circle, in mm.
// teeth = Total number of teeth along the rack // teeth = Total number of teeth along the rack
// thickness = Thickness of rack in mm (affects each tooth) // thickness = Thickness of rack in mm (affects each tooth)
// base = Height of rack in mm, from tooth top to back of rack. // height = Height of rack in mm, from tooth top to back of rack.
// pressure_angle = Controls how straight or bulged the tooth sides are. In degrees. // pressure_angle = Controls how straight or bulged the tooth sides are. In degrees.
// backlash = Gap between two meshing teeth, in the direction along the circumference of the pitch circle // backlash = Gap between two meshing teeth, in the direction along the circumference of the pitch circle
// 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`
@ -829,18 +832,18 @@ module bevel_gear(
// "dedendum-back" = At the base of the teeth, at the back of the rack. // "dedendum-back" = At the base of the teeth, at the back of the rack.
// "dedendum-front" = At the base of the teeth, at the front of the rack. // "dedendum-front" = At the base of the teeth, at the front of the rack.
// Example: // Example:
// rack(pitch=5, teeth=10, thickness=5, base=5, pressure_angle=20); // rack(pitch=5, teeth=10, thickness=5, height=5, pressure_angle=20);
module rack( module rack(
pitch = 5, pitch = 5,
teeth = 20, teeth = 20,
thickness = 5, thickness = 5,
base = 10, height = 10,
pressure_angle = 28, pressure_angle = 28,
backlash = 0.0, backlash = 0.0,
clearance = undef, clearance = undef,
anchor = CENTER, anchor = CENTER,
spin = 0, spin = 0,
orient = UP orient = UP
) { ) {
a = adendum(pitch); a = adendum(pitch);
d = dedendum(pitch, clearance); d = dedendum(pitch, clearance);
@ -857,15 +860,15 @@ module rack(
anchorpt("dedendum-front", [0,-thickness/2,-d], DOWN), anchorpt("dedendum-front", [0,-thickness/2,-d], DOWN),
anchorpt("dedendum-back", [0, thickness/2,-d], UP), anchorpt("dedendum-back", [0, thickness/2,-d], UP),
]; ];
attachable(anchor,spin,orient, size=[l, thickness, 2*abs(a-base)], anchors=anchors) { attachable(anchor,spin,orient, size=[l, thickness, 2*abs(a-height)], anchors=anchors) {
xrot(90) { xrot(90) {
linear_extrude(height=thickness, center=true, convexity=teeth*2) { linear_extrude(height=thickness, center=true, convexity=teeth*2) {
rack2d( rack2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
base = base, height = height,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
backlash = backlash, backlash = backlash,
clearance = clearance clearance = clearance
); );
} }
@ -876,16 +879,16 @@ module rack(
function rack( function rack(
pitch = 5, pitch = 5,
teeth = 20, teeth = 20,
thickness = 5, thickness = 5,
base = 10, height = 10,
pressure_angle = 28, pressure_angle = 28,
backlash = 0.0, backlash = 0.0,
clearance = undef, clearance = undef,
anchor = CENTER, anchor = CENTER,
spin = 0, spin = 0,
orient = UP orient = UP
) = ) =
let( let(
a = adendum(pitch), a = adendum(pitch),
@ -904,15 +907,15 @@ function rack(
anchorpt("dedendum-back", [0, thickness/2,-d], UP), anchorpt("dedendum-back", [0, thickness/2,-d], UP),
], ],
path = rack2d( path = rack2d(
pitch = pitch, pitch = pitch,
teeth = teeth, teeth = teeth,
base = base, height = height,
pressure_angle = pressure_angle, pressure_angle = pressure_angle,
backlash = backlash, backlash = backlash,
clearance = clearance clearance = clearance
), ),
vnf = linear_sweep(path, height=thickness, anchor="origin", orient=FWD) vnf = linear_sweep(path, height=thickness, anchor="origin", orient=FWD)
) reorient(anchor,spin,orient, size=[l, thickness, 2*abs(a-base)], anchors=anchors, p=vnf); ) reorient(anchor,spin,orient, size=[l, thickness, 2*abs(a-height)], anchors=anchors, p=vnf);

4
scripts/docs_gen.py
View file

@ -294,11 +294,11 @@ def mkdn_esc(txt):
while txt: while txt:
m = quotpat.match(txt) m = quotpat.match(txt)
if m: if m:
out += m.group(1).replace(r'_', r'\_') out += m.group(1).replace(r'_', r'\_').replace(r'&',r'&amp;').replace(r'<', r'&lt;').replace(r'>',r'&gt;')
out += m.group(2) out += m.group(2)
txt = m.group(3) txt = m.group(3)
else: else:
out += txt.replace(r'_', r'\_') out += txt.replace(r'_', r'\_').replace(r'&',r'&amp;').replace(r'<', r'&lt;').replace(r'>',r'&gt;')
txt = "" txt = ""
return out return out

2
version.scad
View file

@ -8,7 +8,7 @@
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
BOSL_VERSION = [2,0,453]; BOSL_VERSION = [2,0,454];
// Section: BOSL Library Version Functions // Section: BOSL Library Version Functions