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Modified $overlap to default to zero and made some tweaks to clips and

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dovetails because of this. Fixed bug in rabbit clip with lock=true.
This commit is contained in:
Adrian Mariano 2021-05-16 20:29:04 -04:00
parent b88d05c4db
commit e82483ba79
2 changed files with 21 additions and 14 deletions
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2
attachments.scad
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@ -8,7 +8,7 @@
// Default values for attachment code.
$tags = "";
$overlap = 0.01;
$overlap = 0;
$color = undef;
$attach_to = undef;

33
joiners.scad
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@ -419,7 +419,7 @@ module joiner_quad(spacing1=undef, spacing2=undef, xspacing=undef, yspacing=unde
// Module: dovetail()
//
// Usage:
// dovetail(gender, w|width, h|height, slide, [slope|angle], [taper|back_width], [chamfer], [r|radius], [round], [$slop])
// dovetail(gender, w|width, h|height, slide, [slope|angle], [taper|back_width], [chamfer], [r|radius], [round], [extra], [$slop])
//
// Description:
// Produces a possibly tapered dovetail joint shape to attach to or subtract from two parts you wish to join together.
@ -429,7 +429,9 @@ module joiner_quad(spacing1=undef, spacing2=undef, xspacing=undef, yspacing=unde
// parallel to the Y axis and projecting upwards, so in its default orientation it will slide together with a translation
// in the positive Y direction. The gender determines whether the shape is meant to be added to your model or
// differenced, and it also changes the anchor and orientation. The default anchor for dovetails is BOTTOM;
// the default orientation depends on the gender, with male dovetails oriented UP and female ones DOWN.
// the default orientation depends on the gender, with male dovetails oriented UP and female ones DOWN. The dovetails by default
// have extra extension of 0.01 for unions and differences. You should ensure that attachment is done with overlap=0 to ensure that
// the sizing and positioning is correct.
//
// Arguments:
// gender = A string, "male" or "female", to specify the gender of the dovetail.
@ -473,14 +475,14 @@ module joiner_quad(spacing1=undef, spacing2=undef, xspacing=undef, yspacing=unde
// diff("remove")
// cuboid([50,30,10]) {
// attach(BACK) dovetail("male", slide=10, width=15, height=8, radius=1, $fn=32);
// attach(FRONT, overlap=-0.1) dovetail("female", slide=10, width=15, height=8, radius=1, $tags="remove", $fn=32);
// attach(FRONT) dovetail("female", slide=10, width=15, height=8, radius=1, $tags="remove", $fn=32);
// }
// Example: Or you can make a fully rounded joint
// $fn=32;
// diff("remove")
// cuboid([50,30,10]){
// attach(BACK) dovetail("male", slide=10, width=15, height=8, radius=1.5, round=true);
// attach(FRONT,overlap=-0.1) dovetail("female", slide=10, width=15, height=8, radius=1.5, round=true, $tags="remove");
// attach(FRONT) dovetail("female", slide=10, width=15, height=8, radius=1.5, round=true, $tags="remove");
// }
// Example: With a long joint like this, a taper makes the joint easy to assemble. It will go together easily and wedge tightly if you get the tolerances right. Specifying the taper with `back_width` may be easier than using a taper angle.
// cuboid([50,30,10])
@ -548,8 +550,9 @@ module dovetail(gender, width, height, slide, h, w, angle, slope, taper, back_wi
is_def(back_width) ? (back_width-width) / 2 : 0;
bigend_points = move([offset,slide+2*extra,0], p=smallend_points);
adjustment = $overlap * (gender == "male" ? -1 : 1); // Adjustment for default overlap in attach()
//adjustment = $overlap * (gender == "male" ? -1 : 1); // Adjustment for default overlap in attach()
adjustment = 0; // Default overlap is assumed to be zero
attachable(anchor,spin,orient, size=[width+2*offset, slide, height]) {
down(height/2+adjustment) {
skin(
@ -601,7 +604,8 @@ module _pin_slot(l, r, t, d, nub, depth, stretch) {
module _pin_shaft(r, lStraight, nub, nubscale, stretch, d, pointed)
{
extra = 0.02;
extra = 0.02; // This sets the extra extension below the socket bottom
// so that difference() works without issues
rPoint = r / sqrt(2);
down(extra) cylinder(r = r, h = lStraight + extra);
up(lStraight) {
@ -726,6 +730,8 @@ module snap_pin(size,r,radius,d,diameter, l,length, nub_depth, snap, thickness,
// if you add a lubricant. If `pointed` is true the socket is pointed to receive a pointed pin, otherwise it has a rounded and and
// will be shorter. If `fins` is set to true then two fins are included inside the socket to act as supports (which may help when printing tip up,
// especially when `pointed=false`). The default orientation is DOWN with anchor BOTTOM so that you can difference() the socket away from an object.
// The socket extends 0.02 extra below its bottom anchor point so that differences will work correctly. (You must have $overlap smaller than 0.02 in
// attach or the socket will be beneath the surface of the parent object.)
// .
// The "large" or "standard" size pin has a length of 10.8 and diameter of 7. The "medium" pin has a length of 8 and diameter of 4.6. The "small" pin
// has a length of 6 and diameter of 3.2. The "tiny" pin has a length of 4 and a diameter of 2.5.
@ -802,13 +808,14 @@ module snap_pin_socket(size, r, radius, l,length, d,diameter,nub_depth, snap, fi
// make the socket with a larger depth than the clip (try 0.4 mm) to allow ease of insertion of the clip. The clearance
// value does not apply to the depth. The splinesteps parameter increases the sampling of the clip curves.
// .
// By default clips appear with orient=UP and sockets with orient=DOWN.
// By default clips appear with orient=UP and sockets with orient=DOWN. The clips and sockets extend 0.02 units below
// their base so that unions and differences will work without trouble, but be sure that the attach overlap is smaller
// than 0.02.
// .
// The first figure shows the dimensions of the rabbit clip. The second figure shows the clip in red overlayed on
// its socket in yellow. The left clip has a nonzero clearance, so its socket is bigger than the clip all around.
// The right hand locking clip has no clearance, but it has a lock clearance, which provides some space behind
// the lock to allow the clip to fit. (Note that depending on your printer, this can be set to zero.)
//
// the lock to allow the clip to fit. (Note that depending on your printer, this can be set to zero.)
// Figure(2DMed):
// snap=1.5;
// comp=0.75;
@ -939,7 +946,8 @@ module rabbit_clip(type, length, width, snap, thickness, depth, compression=0.1
} else {
anchor = default(anchor,BOTTOM);
is_pin = in_list(type,["pin","male"]);
default_overlap = 0.01 * (is_pin?1:-1); // Shift by this much to undo default overlap
//default_overlap = 0.01 * (is_pin?1:-1); // Shift by this much to undo default overlap
default_overlap = 0;
extra = 0.02; // Amount of extension below nominal based position for the socket, must exceed default overlap of 0.01
clearance = is_pin ? 0 : clearance;
compression = is_pin ? compression : 0;
@ -989,8 +997,6 @@ module rabbit_clip(type, length, width, snap, thickness, depth, compression=0.1
bez = path_to_bezier(path,relsize=smoothing,tangents=tangent);
rounded = bezier_path(bez,splinesteps=splinesteps);
bounds = pointlist_bounds(rounded);
//kk = search([bounds[1].y], subindex(rounded,1));
//echo(rounded[kk[0]]);
extrapt = is_pin ? [] : [rounded[0] - [0,extra]];
finalpath = is_pin ? rounded
: let(withclearance=offset(rounded, r=-clearance))
@ -1005,6 +1011,7 @@ module rabbit_clip(type, length, width, snap, thickness, depth, compression=0.1
xflip_copy()
right(clearance)
polygon([sidepath[1]+[-thickness/10,lock_clearance],
sidepath[2]-[thickness*.75,0],
sidepath[2],
[sidepath[2].x,sidepath[1].y+lock_clearance]]);
if (is_pin)