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Ribbon clamps can now be made to hold multiple ribbons.

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This commit is contained in:
Chris Palmer 2022-01-29 13:57:40 +00:00
parent 43408843af
commit 1ee80f4a90
3 changed files with 27 additions and 12 deletions
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24
printed/ribbon_clamp.scad
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@ -18,7 +18,10 @@
//
//
//! Clamp for ribbon cable and polypropylene strip.
//! Clamp for ribbon cable and polypropylene strip or one or more ribbon cables.
//!
//! * When `ways` is a scalar number the slot is sized for one rubbon cable and a PP strip.
//! * When `ways` is a two element vector the second element indicates the number of cables and the slot is size for just the cables.
//
include <../core.scad>
use <../vitamins/insert.scad>
@ -34,7 +37,8 @@ function ribbon_clamp_hole_pitch(ways, screw = screw) =
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
function ribbon_clamp_height(screw = screw, ways = undef) = ribbon_clamp_screw_depth(screw) + 1 + //! Height
(!is_undef(ways) && is_list(ways) ? (ways[1] - 1) * inch(0.05) : 0);
module ribbon_clamp_hole_positions(ways, screw = screw, side = undef) //! Place children at hole positions
for(x = is_undef(side) ? [-1, 1] : side)
@ -45,16 +49,20 @@ module ribbon_clamp_holes(ways, h = 20, screw = screw) //! Drill screw holes
ribbon_clamp_hole_positions(ways, screw)
drill(screw_clearance_radius(screw), h);
function str_ways(ways) = is_list(ways) ? str(ways[0], "_", ways[1]) : str(ways);
function str_screw_d(screw_d) = screw_d != 3 ? str("_", screw_d) : "";
module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of ways
screw_d = screw_radius(screw) * 2;
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);
h = ribbon_clamp_height(screw, ways);
slot_d = is_list(ways) ? ways[1] * inch(0.05) : ribbon_clamp_slot_depth();
t = round_to_layer(slot_d + wall);
insert = screw_insert(screw);
stl(str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : ""))
stl(str("ribbon_clamp_", str_ways(ways), str_screw_d(screw_d)))
difference() {
union() {
hull() {
@ -72,7 +80,7 @@ module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of
}
translate_z(h)
cube([ribbon_clamp_slot(ways), d + 1, ribbon_clamp_slot_depth() * 2], center = true);
cube([ribbon_clamp_slot(ways), d + 1, slot_d * 2], center = true);
ribbon_clamp_hole_positions(ways, screw)
translate_z(h)
@ -83,8 +91,8 @@ module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of
module ribbon_clamp_assembly(ways, screw = screw) //! Printed part with inserts in place
pose([55, 180, 25])
assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : ""), ngb = true) {
h = ribbon_clamp_height(screw);
assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", str_ways(ways), str_screw_d(screw_d)), ngb = true) {
h = ribbon_clamp_height(screw, ways);
insert = screw_insert(screw);
stl_colour(pp1_colour) render()

10
readme.md
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@ -645,6 +645,9 @@ When the sides are constrained then a circular model is more accurate.
|:--- |:--- |
| `bezier_cable_length(depth, min_z, pos)` | Calculate a length that will achieve the desired minimum z |
| `cable_strip_length(depth, travel, extra = 15)` | Calculate circular cable strip length |
| `ribbon_clamp_slot(ways)` | Width of the slot to accept a ribbon cable |
| `ribbon_clamp_slot_depth()` | Depth of slot to accept a ribbon cable and a cable strip |
| `ribbon_ways(ways)` | Allows ribbon clamps to accept multiple cables |
### Modules
| Module | Description |
@ -5768,7 +5771,10 @@ The stl and assembly must be given a name and parameterless wrappers for the stl
---
<a name="Ribbon_clamp"></a>
## Ribbon_clamp
Clamp for ribbon cable and polypropylene strip.
Clamp for ribbon cable and polypropylene strip or one or more ribbon cables.
* When `ways` is a scalar number the slot is sized for one rubbon cable and a PP strip.
* When `ways` is a two element vector the second element indicates the number of cables and the slot is size for just the cables.
[printed/ribbon_clamp.scad](printed/ribbon_clamp.scad) Implementation.
@ -5777,7 +5783,7 @@ Clamp for ribbon cable and polypropylene strip.
### Functions
| Function | Description |
|:--- |:--- |
| `ribbon_clamp_height(screw = screw)` | Height |
| `ribbon_clamp_height(screw = screw, ways = undef)` | Height |
| `ribbon_clamp_length(ways, screw = screw)` | Length given ways |
| `ribbon_clamp_width(screw = screw)` | Width |

5
vitamins/cable_strip.scad
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@ -27,8 +27,9 @@
//
include <../utils/core/core.scad>
cable_strip_thickness = 0.8;
function ribbon_clamp_slot(ways) = ways * inch(0.05) + 1;
function ribbon_clamp_slot_depth() = cable_strip_thickness + inch(0.05);
function ribbon_ways(ways) = is_list(ways) ? ways : [ways, 1]; //! Allows ribbon clamps to accept multiple cables
function ribbon_clamp_slot(ways) = let(w = ribbon_ways(ways)) w[0] * inch(0.05) + 1; //! Width of the slot to accept a ribbon cable
function ribbon_clamp_slot_depth() = cable_strip_thickness + inch(0.05); //! Depth of slot to accept a ribbon cable and a cable strip
function cable_strip_thickness() = cable_strip_thickness;
use <../utils/bezier.scad>