Added printed pcb_mount to hold PCBs without mounting holes.

This commit is contained in:
Chris Palmer 2019-10-22 17:47:46 +01:00
parent 18294b4b81
commit a85fdaf176
6 changed files with 218 additions and 7 deletions

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@ -91,6 +91,7 @@ use <tests/strap_handle.scad>
use <tests/ssr_shroud.scad> use <tests/ssr_shroud.scad>
use <tests/psu_shroud.scad> use <tests/psu_shroud.scad>
use <tests/flat_hinge.scad> use <tests/flat_hinge.scad>
use <tests/pcb_mount.scad>
x5 = 800; x5 = 800;
@ -304,6 +305,9 @@ translate([x3, veroboard_y])
translate([x3 + 70, veroboard_y + 30]) translate([x3 + 70, veroboard_y + 30])
geared_steppers(); geared_steppers();
translate([x3 + 140, veroboard_y + 20])
pcb_mounts();
translate([x3, d_connectors_y]) translate([x3, d_connectors_y])
d_connectors(); d_connectors();

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@ -0,0 +1,124 @@
//
// NopSCADlib Copyright Chris Palmer 2019
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
//
//! A frame to mount a PCB by its corners when it has no mounting holes.
//! The stl must be given a parameterless wrapper in the project that uses it.
//
include <../core.scad>
include <../vitamins/screws.scad>
use <../vitamins/pcb.scad>
clearance = 0.2;
min_wall = extrusion_width * 2;
wall = 2;
overlap = 2;
screw = M3_cap_screw;
screw_clearance_r = 3.1 / 2;
pillar_r = corrected_radius(screw_clearance_r) + wall;
function pillar_x_pitch(pcb) = pcb_length(pcb) + 2 * clearance + 2 * (pillar_r - overlap) / sqrt(2); //! x pitch of screw pillars
function pillar_y_pitch(pcb) = pcb_width(pcb) + 2 * clearance + 2 * (pillar_r - overlap) / sqrt(2); //! y pitch of screw pillars
function pcb_mount_length(pcb) = pillar_x_pitch(pcb) + 2 * pillar_r; //! Outside length of the mount
function pcb_mount_width(pcb) = pillar_y_pitch(pcb) + 2 * pillar_r; //! Outside width of the mount
frame_w = 3;
frame_t = 2;
washer_thickness = 1.25;
module pcb_mount_screw_positions(pcb) //! Positions of the screws and pillars
for(x = [-1, 1], y = [-1, 1])
translate([x * pillar_x_pitch(pcb) / 2, y * pillar_y_pitch(pcb) / 2])
children();
module pcb_mount_holes(pcb, h = 0) //! Drill holes for PCB mount
pcb_mount_screw_positions(pcb)
drill(screw_clearance_radius(screw), h);
module pcb_mount_ring()
difference() {
circle(pillar_r);
poly_circle(screw_clearance_r);
}
module pcb_mount_washer_stl() //! A plastic washer to clamp a PCB
linear_extrude(height = washer_thickness)
pcb_mount_ring();
module pcb_mount(pcb, height = 5, washers = true) { //! Make the STL of a pcb mount for the specified PCB.
stl(str("pcb_mount_", pcb[0], "_", height));
y_pitch = pcb_width(pcb) > 4 * pillar_r + 4 ? pillar_r + 1
: pcb_width(pcb) / 2 + frame_w + 1 + pillar_r;
if(washers)
for(x = [-1, 1], y = [-1, 1])
translate([x * (pillar_r + 1), y * y_pitch, 0])
pcb_mount_washer_stl();
for(x = [-1, 1])
translate([x * pillar_x_pitch(pcb) / 2, 0, frame_t / 2])
cube([frame_w, pillar_y_pitch(pcb) - 2 * wall, frame_t], center = true);
for(y = [-1, 1])
translate([0, y * pillar_y_pitch(pcb) / 2, frame_t / 2])
cube([pillar_x_pitch(pcb) - 2 * wall, frame_w, frame_t], center = true);
pcb_mount_screw_positions(pcb)
linear_extrude(height = height)
pcb_mount_ring();
linear_extrude(height = height + pcb_thickness(pcb) - layer_height)
difference() {
pcb_mount_screw_positions(pcb)
pcb_mount_ring();
square([pcb_length(pcb) + 2 * clearance, pcb_width(pcb) + 2 * clearance], center = true);
}
}
module pcb_mount_assembly(pcb, thickness, height = 5) { //! A PCB mount assembly with fasteners
translate_z(height)
pcb(pcb);
color(pp1_colour) pcb_mount(pcb, washers = false);
washer = screw_washer(screw);
nut = screw_nut(screw);
t = pcb_thickness(pcb);
screw_length = screw_longer_than(height + t + washer_thickness + thickness + washer_thickness(washer) + nut_thickness(nut, true));
pcb_mount_screw_positions(pcb) {
translate_z(height + t) {
color(pp2_colour) pcb_mount_washer_stl();
translate_z(washer_thickness)
screw(screw, screw_length);
}
translate_z(-thickness)
vflip()
nut_and_washer(nut, true);
}
}

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@ -30,13 +30,13 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Ring_terminals">Ring_terminals</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr> <tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Ring_terminals">Ring_terminals</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr> <tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr> <tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr> <tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Pcb_mount">Pcb_mount</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr> <tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr> <tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr> <tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td></td><td></td></tr>
<tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr> <tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
<tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr> <tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr>
<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td></td><td></td><td></td></tr> <tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
<tr><td> <a href = "#Ldrs">Ldrs</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr> <tr><td> <a href = "#Ldrs">Ldrs</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr>
<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr> <tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr>
<tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr> <tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr>
@ -3851,6 +3851,54 @@ Printed handle that can be printed without needing support material due to its t
| 1 | handle_assembly | | 1 | handle_assembly |
<a href="#top">Top</a>
---
<a name="Pcb_mount"></a>
## Pcb_mount
A frame to mount a PCB by its corners when it has no mounting holes.
The stl must be given a parameterless wrapper in the project that uses it.
[printed/pcb_mount.scad](printed/pcb_mount.scad) Implementation.
[tests/pcb_mount.scad](tests/pcb_mount.scad) Code for this example.
### Functions
| Function | Description |
|:--- |:--- |
| ```pcb_mount_length(pcb)``` | Outside length of the mount |
| ```pcb_mount_width(pcb)``` | Outside width of the mount |
| ```pillar_x_pitch(pcb)``` | x pitch of screw pillars |
| ```pillar_y_pitch(pcb)``` | y pitch of screw pillars |
### Modules
| Module | Description |
|:--- |:--- |
| ```pcb_mount(pcb, height = 5, washers = true)``` | Make the STL of a pcb mount for the specified PCB. |
| ```pcb_mount_assembly(pcb, thickness, height = 5)``` | A PCB mount assembly with fasteners |
| ```pcb_mount_holes(pcb, h = 0)``` | Drill holes for PCB mount |
| ```pcb_mount_screw_positions(pcb)``` | Positions of the screws and pillars |
| ```pcb_mount_washer_stl()``` | A plastic washer to clamp a PCB |
![pcb_mount](tests/png/pcb_mount.png)
### Vitamins
| Qty | Module call | BOM entry |
| ---:|:--- |:---|
| 4 | ```nut(M3_nut, nyloc = true)``` | Nut M3 x 2.4mm nyloc |
| 1 | ```pcb(PI_IO)``` | PI_IO V2 |
| 1 | ```pin_socket(2p54header, 13, 2)``` | Pin socket 13 x 2 |
| 4 | ```screw(M3_cap_screw, 16)``` | Screw M3 cap x 16mm |
| 3 | ```terminal_35(2)``` | Terminal block 2 way 3.5mm |
| 4 | ```washer(M3_washer)``` | Washer M3 x 7mm x 0.5mm |
### Printed
| Qty | Filename |
| ---:|:--- |
| 1 | pcb_mount_PI_IO_5.stl |
<a href="#top">Top</a> <a href="#top">Top</a>
--- ---

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@ -0,0 +1,35 @@
//
// NopSCADlib Copyright Chris Palmer 2019
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
include <../lib.scad>
use <../printed/pcb_mount.scad>
PI_IO = ["PI_IO", "PI_IO V2", 35.56, 25.4, 1.6, 0, 0, 0, "green", true, [],
[[(3.015 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.685) * 25.4, 90, "term35", 2],
[(3.46 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.69) * 25.4, 90, "term35", 2],
[(3.91 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.69) * 25.4, 90, "term35", 2],
[(3.4 - 2.7) * 25.4, (4.5 - 4.15) * 25.4, 0, "2p54socket", 13, 2],
], []];
module pcb_mounts()
if($preview)
pcb_mount_assembly(PI_IO, 3);
else
pcb_mount(PI_IO);
pcb_mounts();

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