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doc fixes mostly

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This commit is contained in:
Adrian Mariano 2022-09-24 23:43:06 -04:00
parent 7d9ec509d2
commit 42afcaa144
1 changed files with 27 additions and 12 deletions
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39
screws.scad
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@ -212,6 +212,8 @@ Torx values: https://www.stanleyengineeredfastening.com/-/media/web/sef/resourc
// anchor = Translate so anchor point on the shaft is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `BOTTOM`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// `$screw_spec` is set to the spec specification structure.
// Anchor Types:
// screw = the entire screw (default)
// head = screw head (invalid for headless screws)
@ -429,6 +431,7 @@ module screw(spec, head, drive, thread, drive_size,
is_struct(spec) ? spec
: screw_info(spec, default(head,"none"), drive, thread=thread, drive_size=drive_size,
threads_oversize=-shaft_undersize, head_oversize=-head_undersize) );
$screw_spec = spec;
head = struct_val(spec,"head");
pitch = thread==0 || thread=="none" ? 0 : struct_val(spec, "pitch") ;
nominal_diam = struct_val(spec, "diameter");
@ -593,6 +596,8 @@ module screw(spec, head, drive, thread, drive_size,
// anchor = Translate so anchor point on the shaft is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `BOTTOM`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// `$screw_spec` is set to the spec specification structure.
// Anchor Types:
// screw = the entire screw (default)
// head = screw head (invalid for headless screws)
@ -636,7 +641,6 @@ module screw_hole(spec, head, thread=false, oversize, hole_oversize, head_oversi
atype="screw",anchor=BOTTOM,spin=0, orient=UP)
{
// Force flatheads to sharp for proper countersink shape
head = is_def(head) && starts_with(head,"flat") ? str(head," sharp")
: head;
if ((thread && thread!="none") || is_def(oversize) || is_def(hole_oversize) || tolerance==0 || tolerance=="none") {
@ -753,7 +757,7 @@ module screw_hole(spec, head, thread=false, oversize, hole_oversize, head_oversi
: in_list(downcase(tolerance), ["normal", "medium"]) ? 1
: in_list(downcase(tolerance), ["loose", "coarse"]) ? 2
: in_list(tolerance, ["H12","H13","H14"]) ?
assert(struct_val(spec,"systerm")=="ISO", str("Hole tolerance ", tolerance, " only allowed with ISO screws"))
assert(struct_val(spec,"system")=="ISO", str("Hole tolerance ", tolerance, " only allowed with ISO screws"))
parse_int(substr(tolerance,1))
: assert(false,str("Unknown tolerance ",tolerance, " for clearance hole"));
tol_table = struct_val(spec,"system")=="UTS" ? UTS_clearance[tol_ind] : ISO_clearance[tol_ind];
@ -805,8 +809,9 @@ module screw_hole(spec, head, thread=false, oversize, hole_oversize, head_oversi
// drive_size = size of the drive recess
// thread = thread type or specification. See [screw pitch](#subsection-standard-screw-pitch). Default: "coarse"
// spec = screw specification to define the thread size
// head_height = scalar or vector to give width,height, if no height computed according to formula for UTS sockets
// for flathead second value is the sharp size, and if not given it will be 12% more than given size
// head_size = scalar or vector to give width or [width, height]. If you only give width, height is computed using a formula for socket heads. For flat head screws the second value in the vector is the sharp size; if you don't give it then the sharp size will be 12% more than the given size
// Side Effects:
// `$screw_spec` is set to the spec specification structure.
// Anchor Types:
// screw = the entire screw (default)
// head = screw head (invalid for headless screws)
@ -1359,7 +1364,7 @@ echo(polygon=([[0,-flat_height],[r2,-flat_height],[r1,-flat_height+slopeheight],
// Note that flat head screws are defined by two different diameters, the theoretical maximum diameter, "head_size_sharp"
// and the actual diameter, "head_size". The screw form is defined using the theoretical maximum, which gives
// sharp circular edge at the top of the screw. Real screws have a flat chamfer around the edge.
// Figure(2D,Med): Flat head screw geometry
// Figure(2D,Med,NoAxes,VPD=39,VPT=[0,-4]): Flat head screw geometry
// polysharp = [[0, -5.07407], [4.92593, -5.07407], [10, 0], [10, 0.01], [0, 0.01]];
// color("blue"){
// xflip_copy()polygon(polysharp);
@ -1418,7 +1423,8 @@ function screw_info(spec, head="none", drive, thread="coarse", drive_size=undef,
over_ride = concat(
len(drive_info)>=3 ? ["drive_depth", drive_info[2]] : [],
is_def(type[3]) ? ["length",type[3]] : [],
is_def(drive_info[1]) ? ["drive_size", drive_info[1]] : []
is_def(drive_info[1]) ? ["drive_size", drive_info[1]] : [],
"name",spec
)
)
_oversize_screw(struct_set(screwdata, over_ride), threads_oversize=threads_oversize, head_oversize=head_oversize);
@ -1828,8 +1834,14 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
]
: []
)
concat([["system","UTS"],["diameter",INCH*diameter],["pitch", pitch],["drive",drive]],
head_data
concat([
["type","screw_info"],
["system","UTS"],
["diameter",INCH*diameter],
["pitch", pitch],
["drive",drive]
],
head_data
);
@ -2144,13 +2156,16 @@ function _screw_info_metric(diam, pitch, head, thread, drive) =
: []
)
concat(
[["system","ISO"],["diameter",diam],["pitch", pitch],["drive",drive]],
[
["type","screw_info"],
["system","ISO"],
["diameter",diam],
["pitch", pitch],
["drive",drive]
],
head_data
);
function _is_positive(x) = is_num(x) && x>0;
function _validate_screw_spec(spec) = let(