mirror of
https://github.com/BelfrySCAD/BOSL2.git
synced 2024-12-29 16:29:40 +00:00
Revar Desmera
GitHub
commit
e971554d2c
1 changed files with 33 additions and 32 deletions
65
screws.scad
65
screws.scad
|
|
@ -54,7 +54,7 @@ include <screw_drive.scad>
|
|||
// To set the pitch using these pitch strings you use the `thread=` argument to the modules.
|
||||
// You cannot incorporate a named pitch into the thread name. The finer pitch categories
|
||||
// are defined only for larger screw diameters. You can also use the `thread=` argument to
|
||||
// directly specify a pitch, so `thread=2` would produce a thread pitch of 2mm. Setting the
|
||||
// directly specify a pitch, so `thread=2` produces a thread pitch of 2mm. Setting the
|
||||
// pitch to zero produces an unthreaded screws, the same as setting it to "none". Specifying
|
||||
// a numeric value this way overrides a value given in the name.
|
||||
// Subsection: Screw Heads
|
||||
|
|
@ -73,20 +73,20 @@ include <screw_drive.scad>
|
|||
// shows which drive type is compatible with each head types. Different head types work in ISO and UTS,
|
||||
// as marked in the first column.
|
||||
// .
|
||||
// ISO|UTS|Head | Drive
|
||||
// ---|---|--------------- | ----------------------------
|
||||
// X|X|"none" | hex, torx
|
||||
// X|X|"hex" | *none*
|
||||
// X|X|"socket" | hex, torx
|
||||
// X|X|"button" | hex, torx
|
||||
// X|X|"flat" | slot, phillips, hex, torx
|
||||
// |X|"round" | slot, phillips
|
||||
// |X|"fillister" | slot, phillips
|
||||
// |X|"flat small" | phillips, slot
|
||||
// |X|"flat large" | hex, torx
|
||||
// |X|"flat undercut" | slot, phillips
|
||||
// X| |"pan" | slot, phillips
|
||||
// X| |"cheese" | slot, phillips
|
||||
// |ISO|UTS|Head | Drive |
|
||||
// |---|---|--------------- | ----------------------------|
|
||||
// |X|X|"none" | hex, torx|
|
||||
// |X|X|"hex" | *none*|
|
||||
// |X|X|"socket" | hex, torx|
|
||||
// |X|X|"button" | hex, torx|
|
||||
// |X|X|"flat" | slot, phillips, hex, torx|
|
||||
// | |X|"round" | slot, phillips |
|
||||
// | |X|"fillister" | slot, phillips |
|
||||
// | |X|"flat small" | slot, phillips|
|
||||
// | |X|"flat large" | hex, torx |
|
||||
// | |X|"flat undercut" | slot, phillips |
|
||||
// |X| |"pan" | slot, phillips |
|
||||
// |X| |"cheese" | slot, phillips |
|
||||
// .
|
||||
// The drive size is specified appropriately to the drive type: drive number for phillips or torx,
|
||||
// and allen width in mm or inches (as appropriate) for hex. Drive size is determined automatically
|
||||
|
|
@ -98,15 +98,15 @@ include <screw_drive.scad>
|
|||
// modeled by this method will have dimensions consistent with the standards they are based on, so that
|
||||
// they would interface properly if fabricated by an accurate method. Different tolerance designations
|
||||
// are used for nuts and screws, and also for UTS and ISO.
|
||||
// .
|
||||
// .
|
||||
// For UTS screw threads the tolerance is one of "1A", "2A" or "3A", in
|
||||
// order of increasing tightness. The default tolerance is "2A", which
|
||||
// is the general standard for manufactured bolts.
|
||||
// .
|
||||
// .
|
||||
// For UTS nut threads, the tolerance is one of "1B", "2B" or "3B", in
|
||||
// order of increasing tightness. The default tolerance is "2B", which
|
||||
// is the general standard for manufactured nuts.
|
||||
// .
|
||||
// .
|
||||
// For ISO the tolerance
|
||||
// has the form of a number and letter. The letter specifies the "fundamental deviation",
|
||||
// also called the "tolerance position", the gap
|
||||
|
|
@ -118,7 +118,7 @@ include <screw_drive.scad>
|
|||
// but they can be different, with a tolerance like "5g6g" specifies a pitch diameter
|
||||
// tolerance of "5g" and a crest diameter tolerance of "6g".
|
||||
// Smaller numbers give a tighter tolerance. The default ISO tolerance is "6g".
|
||||
// .
|
||||
// .
|
||||
// For ISO nuts the form is the same, but the number specifying the variability must range from 4-8,
|
||||
// and the fundamental deviation letter must be "G" or "H" where "G" is loose and "H" means
|
||||
// no gap. An allowed (loose) nut tolerance is "7G". The default ISO tolerance is "6H".
|
||||
|
|
@ -298,9 +298,9 @@ Torx values: https://www.stanleyengineeredfastening.com/-/media/web/sef/resourc
|
|||
// down(INCH*1/20*2.145) nut("1/4-20", thickness=8, diameter=0.5*INCH,tolerance="1B");
|
||||
// }
|
||||
|
||||
function screw(name, head, drive, thread="coarse", drive_size, oversize=0, spec, length, l, shank=0, tolerance=undef, details=true, anchor=undef,anchor_head=undef,spin=0, orient=UP) = no_function("screw");
|
||||
function screw(name, head="none", drive, thread="coarse", drive_size, oversize=0, spec, length, l, shank=0, tolerance=undef, details=true, anchor=undef,anchor_head=undef,spin=0, orient=UP) = no_function("screw");
|
||||
|
||||
module screw(name, head, drive, thread="coarse", drive_size, oversize=0, spec, length, l, shank=0, tolerance=undef, details=true, anchor=undef,anchor_head=undef,spin=0, orient=UP)
|
||||
module screw(name, head="none", drive, thread="coarse", drive_size, oversize=0, spec, length, l, shank=0, tolerance=undef, details=true, anchor=undef,anchor_head=undef,spin=0, orient=UP)
|
||||
{
|
||||
a=echo(ssthread=thread);
|
||||
spec = _validate_screw_spec(
|
||||
|
|
@ -310,8 +310,10 @@ module screw(name, head, drive, thread="coarse", drive_size, oversize=0, spec, l
|
|||
head = struct_val(spec,"head");
|
||||
pitch = struct_val(spec, "pitch");
|
||||
diameter = struct_val(spec, "diameter");
|
||||
headless = head=="none" || head==undef;
|
||||
eps = headless || starts_with(head,"flat") ? 0 : 0.01;
|
||||
headless = head=="none";
|
||||
eps = headless ? 0
|
||||
: starts_with(head,"flat") ? -0.01
|
||||
: 0.01;
|
||||
screwlen = one_defined([l,length],"l,length",dflt=undef);
|
||||
length = u_add(first_defined([screwlen,struct_val(spec,"length")]) , eps);
|
||||
assert(all_positive(length), "Must specify positive length");
|
||||
|
|
@ -688,7 +690,6 @@ module screw_head(screw_info,details=false) {
|
|||
full_height = head_size/2/tan(angle);
|
||||
height = is_def(head_height) ? head_height : full_height;
|
||||
d2 = head_size*(1-height/full_height);
|
||||
//down(height)
|
||||
zflip()
|
||||
cyl(d1=head_size, d2=d2, l=height, anchor=BOTTOM);
|
||||
}
|
||||
|
|
@ -758,7 +759,7 @@ module screw_head(screw_info,details=false) {
|
|||
// thread = thread type or specification. See [screw pitch](#subsection-standard-screw-pitch). Default: "coarse"
|
||||
// drive_size = size of drive recess to override computed value
|
||||
// oversize = amount to increase screw diameter for clearance holes. Default: 0
|
||||
function screw_info(name, head, drive, thread="coarse", drive_size=undef, oversize=0) =
|
||||
function screw_info(name, head="none", drive, thread="coarse", drive_size=undef, oversize=0) =
|
||||
let(type=_parse_screw_name(name),
|
||||
drive_info = _parse_drive(drive, drive_size),
|
||||
drive=drive_info[0],
|
||||
|
|
@ -822,7 +823,7 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
|
|||
)
|
||||
INCH / struct_val(UTS_thread, diam)[tind],
|
||||
head_data =
|
||||
head=="none" || is_undef(head) ? let (
|
||||
head=="none" ? let (
|
||||
UTS_setscrew = [ // hex width, hex depth
|
||||
["#0", [0.028, 0.050]],
|
||||
["#1", [0.035, 0.060]],
|
||||
|
|
@ -1151,7 +1152,7 @@ function _screw_info_metric(diam, pitch, head, thread, drive) =
|
|||
)
|
||||
struct_val(ISO_thread, diam)[tind],
|
||||
head_data =
|
||||
head=="none" || is_undef(head) ? let(
|
||||
head=="none" ? let(
|
||||
metric_setscrew =
|
||||
[
|
||||
[1.4, [0.7]],
|
||||
|
|
@ -1363,7 +1364,7 @@ function _validate_screw_spec(spec) = let(
|
|||
pitch = struct_val(spec,"pitch"),
|
||||
pitchOK = is_undef(pitch) || (is_num(pitch) && pitch>=0),
|
||||
head = struct_val(spec,"head"),
|
||||
headOK = is_undef(head) || head=="none" || (
|
||||
headOK = head=="none" || (
|
||||
in_list(head, ["cheese","pan flat","pan round", "flat","flat large", "flat small", "flat undercut", "button","socket","fillister","round","hex"]) &&
|
||||
_is_positive(struct_val(spec, "head_size"))),
|
||||
drive = struct_val(spec, "drive"),
|
||||
|
|
@ -1382,7 +1383,7 @@ function _validate_screw_spec(spec) = let(
|
|||
assert(systemOK, str("Screw spec has invalid \"system\", ", struct_val(spec,"system"), ". Must be \"ISO\" or \"UTS\""))
|
||||
assert(diamOK, str("Screw spec has invalid \"diameter\", ", struct_val(spec,"diameter")))
|
||||
assert(pitchOK, str("Screw spec has invalid \"pitch\", ", pitch))
|
||||
assert(headOK, "Screw spec head type invalid or unknown for your screw size")
|
||||
assert(headOK, "Screw spec head type invalid or unknown for your screw type and size")
|
||||
assert(driveOK, "Screw drive type invalid or unknown for your screw size or head type")
|
||||
spec;
|
||||
|
||||
|
|
@ -1393,9 +1394,9 @@ function _validate_screw_spec(spec) = let(
|
|||
// Usage:
|
||||
// thread_specification(screw_spec, [tolerance], [internal])
|
||||
// Description:
|
||||
// Determines actual thread geometry for a given screw with specified tolerance. If tolerance is omitted the default is used. If tolerance
|
||||
// is "none" or 0 then return the nominal thread geometry. See {{screw()}} or {{nut()}} for details on tolerance values for screws (internal=false) and
|
||||
// nuts (internal=true).
|
||||
// Determines actual thread geometry for a given screw with specified tolerance and nominal size. See [tolerance](#subsection-tolerance) for
|
||||
// information on tolerances. If tolerance is omitted the default is used. If tolerance
|
||||
// is "none" or 0 then return the nominal thread geometry. When `internal=true` the nut tolerance is used.
|
||||
// .
|
||||
// The return value is a structure with the following fields:
|
||||
// - pitch: the thread pitch
|
||||
|
|
|
|||
Loading…
Reference in a new issue