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Made ribbon_clamps parametric on screw size.

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This commit is contained in:
Chris Palmer
2020-09-11 19:53:14 +01:00
parent 6b0132c32e
commit 332933a4fd
8 changed files with 71 additions and 55 deletions
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69
printed/ribbon_clamp.scad
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@@ -24,69 +24,72 @@ include <../core.scad>
use <../vitamins/insert.scad>
use <../vitamins/cable_strip.scad>
wall = 2;
wall = 1.6;
min_wall = 2 * extrusion_width;
screw = M3_cap_screw;
insert = screw_insert(screw);
screw_depth = insert_length(insert) + 1;
function ribbon_clamp_hole_pitch(ways) = ribbon_clamp_slot(ways) + 2 * min_wall + 2 * corrected_radius(insert_hole_radius(insert)); //! Hole pitch
function ribbon_clamp_width() = 2 * (insert_hole_radius(insert) + wall); //! Width
function ribbon_clamp_length(ways) = ribbon_clamp_hole_pitch(ways) + ribbon_clamp_width(); //! Length given ways
function ribbon_clamp_height() = screw_depth + 1; //! Height
function ribbon_clamp_screw_depth(screw = screw) = insert_length(screw_insert(screw)) + 1;
function ribbon_clamp_hole_pitch(ways, screw = screw) =
ribbon_clamp_slot(ways) + 2 * min_wall + 2 * corrected_radius(insert_hole_radius(screw_insert(screw))); //! Hole pitch
module ribbon_clamp_hole_positions(ways, side = undef) //! Place children at hole positions
function ribbon_clamp_width(screw = screw) = 2 * (insert_hole_radius(screw_insert(screw)) + wall); //! Width
function ribbon_clamp_length(ways, screw = screw) = ribbon_clamp_hole_pitch(ways, screw) + ribbon_clamp_width(screw); //! Length given ways
function ribbon_clamp_height(screw = screw) = ribbon_clamp_screw_depth(screw) + 1; //! Height
module ribbon_clamp_hole_positions(ways, screw = screw, side = undef) //! Place children at hole positions
for(x = is_undef(side) ? [-1, 1] : side)
translate([x * ribbon_clamp_hole_pitch(ways) / 2, 0])
translate([x * ribbon_clamp_hole_pitch(ways, screw) / 2, 0])
children();
module ribbon_clamp_holes(ways, h = 20) //! Drill screw holes
ribbon_clamp_hole_positions(ways)
module ribbon_clamp_holes(ways, h = 20, screw = screw) //! Drill screw holes
ribbon_clamp_hole_positions(ways, screw)
drill(screw_clearance_radius(screw), h);
module ribbon_clamp(ways) { //! Generate STL for given number of ways
stl(str("ribbon_clamp_", ways));
module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of ways
screw_d = screw_radius(screw) * 2;
stl(str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : ""));
pitch = ribbon_clamp_hole_pitch(ways);
d = ribbon_clamp_width();
h = ribbon_clamp_height();
t = h - ribbon_clamp_slot_depth() - wall;
pitch = ribbon_clamp_hole_pitch(ways, screw);
d = ribbon_clamp_width(screw);
h = ribbon_clamp_height(screw);
t = round_to_layer(ribbon_clamp_slot_depth() + wall);
insert = screw_insert(screw);
difference() {
union() {
hull() {
translate_z(h - t / 2)
cube([ribbon_clamp_hole_pitch(ways), d, t], center = true);
cube([ribbon_clamp_hole_pitch(ways, screw), d, t], center = true);
translate_z(1)
cube([pitch, max(wall, d - 2 * (h - t)), 2], center = true);
}
ribbon_clamp_hole_positions(ways, -1)
ribbon_clamp_hole_positions(ways, screw, -1)
cylinder(d = d, h = h);
ribbon_clamp_hole_positions(ways, 1)
ribbon_clamp_hole_positions(ways, screw, 1)
cylinder(d = d, h = h);
}
translate_z(h)
cube([ribbon_clamp_slot(ways), d + 1, ribbon_clamp_slot_depth() * 2], center = true);
ribbon_clamp_hole_positions(ways)
ribbon_clamp_hole_positions(ways, screw)
translate_z(h)
rotate(22.5)
insert_hole(insert, screw_depth - insert_length(insert));
insert_hole(insert, ribbon_clamp_screw_depth(screw) - insert_length(insert));
}
}
module ribbon_clamp_assembly(ways) pose([55, 180, 25]) //! Printed part with inserts in place
assembly(str("ribbon_clamp_", ways)) {
h = ribbon_clamp_height();
module ribbon_clamp_assembly(ways, screw) pose([55, 180, 25]) //! Printed part with inserts in place
assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : "")) {
h = ribbon_clamp_height(screw);
insert = screw_insert(screw);
stl_colour(pp1_colour) render()
translate_z(h) vflip() ribbon_clamp(ways);
translate_z(h) vflip() ribbon_clamp(ways, screw);
ribbon_clamp_hole_positions(ways)
ribbon_clamp_hole_positions(ways, screw)
vflip()
insert(insert);
}
@@ -99,20 +102,24 @@ module ribbon_clamp_fastened_assembly(ways, thickness, screw = screw) { //! Clam
vitamin(str(": Tape self amalgamating silicone ",tape_l," x 25mm"));
washer = screw_washer(screw);
screw_length = screw_shorter_than(2 * washer_thickness(washer) + thickness + screw_depth);
screw_length = screw_shorter_than(2 * washer_thickness(washer) + thickness + ribbon_clamp_screw_depth(screw));
ribbon_clamp_assembly(ways);
ribbon_clamp_assembly(ways, screw);
color("red") translate_z(tape_thickness / 2)
cube([tape_l, tape_width, tape_thickness], center = true);
ribbon_clamp_hole_positions(ways)
ribbon_clamp_hole_positions(ways, screw)
vflip()
translate_z(thickness)
screw_and_washer(screw, screw_length, true);
}
module ribbon_clamp_20_stl() ribbon_clamp(20);
module ribbon_clamp_8_2_stl() ribbon_clamp(8, M2_dome_screw);
//! * Place inserts into the holes and press home with a soldering iron with a conical bit heated to 200&deg;C.
module ribbon_clamp_20_assembly() ribbon_clamp_assembly(20);
//! * Place inserts into the holes and press home with a soldering iron with a conical bit heated to 200&deg;C.
module ribbon_clamp_8_2_assembly() ribbon_clamp_assembly(8, M2_dome_screw);