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Added printed pcb_mount to hold PCBs without mounting holes.
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Chris Palmer
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libtest.png
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@ -91,6 +91,7 @@ use <tests/strap_handle.scad>
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use <tests/ssr_shroud.scad>
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use <tests/psu_shroud.scad>
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use <tests/flat_hinge.scad>
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use <tests/pcb_mount.scad>
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x5 = 800;
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@ -304,6 +305,9 @@ translate([x3, veroboard_y])
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translate([x3 + 70, veroboard_y + 30])
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geared_steppers();
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translate([x3 + 140, veroboard_y + 20])
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pcb_mounts();
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translate([x3, d_connectors_y])
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d_connectors();
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124
printed/pcb_mount.scad
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124
printed/pcb_mount.scad
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@ -0,0 +1,124 @@
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//
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// NopSCADlib Copyright Chris Palmer 2019
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! A frame to mount a PCB by its corners when it has no mounting holes.
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//! The stl must be given a parameterless wrapper in the project that uses it.
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//
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include <../core.scad>
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include <../vitamins/screws.scad>
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use <../vitamins/pcb.scad>
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clearance = 0.2;
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min_wall = extrusion_width * 2;
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wall = 2;
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overlap = 2;
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screw = M3_cap_screw;
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screw_clearance_r = 3.1 / 2;
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pillar_r = corrected_radius(screw_clearance_r) + wall;
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function pillar_x_pitch(pcb) = pcb_length(pcb) + 2 * clearance + 2 * (pillar_r - overlap) / sqrt(2); //! x pitch of screw pillars
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function pillar_y_pitch(pcb) = pcb_width(pcb) + 2 * clearance + 2 * (pillar_r - overlap) / sqrt(2); //! y pitch of screw pillars
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function pcb_mount_length(pcb) = pillar_x_pitch(pcb) + 2 * pillar_r; //! Outside length of the mount
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function pcb_mount_width(pcb) = pillar_y_pitch(pcb) + 2 * pillar_r; //! Outside width of the mount
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frame_w = 3;
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frame_t = 2;
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washer_thickness = 1.25;
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module pcb_mount_screw_positions(pcb) //! Positions of the screws and pillars
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for(x = [-1, 1], y = [-1, 1])
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translate([x * pillar_x_pitch(pcb) / 2, y * pillar_y_pitch(pcb) / 2])
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children();
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module pcb_mount_holes(pcb, h = 0) //! Drill holes for PCB mount
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pcb_mount_screw_positions(pcb)
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drill(screw_clearance_radius(screw), h);
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module pcb_mount_ring()
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difference() {
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circle(pillar_r);
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poly_circle(screw_clearance_r);
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}
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module pcb_mount_washer_stl() //! A plastic washer to clamp a PCB
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linear_extrude(height = washer_thickness)
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pcb_mount_ring();
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module pcb_mount(pcb, height = 5, washers = true) { //! Make the STL of a pcb mount for the specified PCB.
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stl(str("pcb_mount_", pcb[0], "_", height));
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y_pitch = pcb_width(pcb) > 4 * pillar_r + 4 ? pillar_r + 1
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: pcb_width(pcb) / 2 + frame_w + 1 + pillar_r;
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if(washers)
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for(x = [-1, 1], y = [-1, 1])
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translate([x * (pillar_r + 1), y * y_pitch, 0])
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pcb_mount_washer_stl();
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for(x = [-1, 1])
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translate([x * pillar_x_pitch(pcb) / 2, 0, frame_t / 2])
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cube([frame_w, pillar_y_pitch(pcb) - 2 * wall, frame_t], center = true);
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for(y = [-1, 1])
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translate([0, y * pillar_y_pitch(pcb) / 2, frame_t / 2])
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cube([pillar_x_pitch(pcb) - 2 * wall, frame_w, frame_t], center = true);
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pcb_mount_screw_positions(pcb)
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linear_extrude(height = height)
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pcb_mount_ring();
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linear_extrude(height = height + pcb_thickness(pcb) - layer_height)
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difference() {
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pcb_mount_screw_positions(pcb)
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pcb_mount_ring();
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square([pcb_length(pcb) + 2 * clearance, pcb_width(pcb) + 2 * clearance], center = true);
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}
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}
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module pcb_mount_assembly(pcb, thickness, height = 5) { //! A PCB mount assembly with fasteners
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translate_z(height)
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pcb(pcb);
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color(pp1_colour) pcb_mount(pcb, washers = false);
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washer = screw_washer(screw);
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nut = screw_nut(screw);
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t = pcb_thickness(pcb);
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screw_length = screw_longer_than(height + t + washer_thickness + thickness + washer_thickness(washer) + nut_thickness(nut, true));
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pcb_mount_screw_positions(pcb) {
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translate_z(height + t) {
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color(pp2_colour) pcb_mount_washer_stl();
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translate_z(washer_thickness)
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screw(screw, screw_length);
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}
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translate_z(-thickness)
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vflip()
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nut_and_washer(nut, true);
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}
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}
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62
readme.md
62
readme.md
@ -30,13 +30,13 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td></td><td></td><td></td></tr>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<tr><td> <a href = "#Ldrs">Ldrs</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr>
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<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr>
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<tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr>
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@ -3851,6 +3851,54 @@ Printed handle that can be printed without needing support material due to its t
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| 1 | handle_assembly |
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<a href="#top">Top</a>
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---
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<a name="Pcb_mount"></a>
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## Pcb_mount
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A frame to mount a PCB by its corners when it has no mounting holes.
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The stl must be given a parameterless wrapper in the project that uses it.
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[printed/pcb_mount.scad](printed/pcb_mount.scad) Implementation.
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[tests/pcb_mount.scad](tests/pcb_mount.scad) Code for this example.
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### Functions
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| Function | Description |
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|:--- |:--- |
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| ```pcb_mount_length(pcb)``` | Outside length of the mount |
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| ```pcb_mount_width(pcb)``` | Outside width of the mount |
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| ```pillar_x_pitch(pcb)``` | x pitch of screw pillars |
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| ```pillar_y_pitch(pcb)``` | y pitch of screw pillars |
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### Modules
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| Module | Description |
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|:--- |:--- |
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| ```pcb_mount(pcb, height = 5, washers = true)``` | Make the STL of a pcb mount for the specified PCB. |
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| ```pcb_mount_assembly(pcb, thickness, height = 5)``` | A PCB mount assembly with fasteners |
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| ```pcb_mount_holes(pcb, h = 0)``` | Drill holes for PCB mount |
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| ```pcb_mount_screw_positions(pcb)``` | Positions of the screws and pillars |
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| ```pcb_mount_washer_stl()``` | A plastic washer to clamp a PCB |
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### Vitamins
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| Qty | Module call | BOM entry |
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| ---:|:--- |:---|
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| 4 | ```nut(M3_nut, nyloc = true)``` | Nut M3 x 2.4mm nyloc |
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| 1 | ```pcb(PI_IO)``` | PI_IO V2 |
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| 1 | ```pin_socket(2p54header, 13, 2)``` | Pin socket 13 x 2 |
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| 4 | ```screw(M3_cap_screw, 16)``` | Screw M3 cap x 16mm |
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| 3 | ```terminal_35(2)``` | Terminal block 2 way 3.5mm |
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| 4 | ```washer(M3_washer)``` | Washer M3 x 7mm x 0.5mm |
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### Printed
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| Qty | Filename |
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| ---:|:--- |
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| 1 | pcb_mount_PI_IO_5.stl |
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<a href="#top">Top</a>
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---
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35
tests/pcb_mount.scad
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35
tests/pcb_mount.scad
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@ -0,0 +1,35 @@
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//
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// NopSCADlib Copyright Chris Palmer 2019
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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include <../lib.scad>
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use <../printed/pcb_mount.scad>
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PI_IO = ["PI_IO", "PI_IO V2", 35.56, 25.4, 1.6, 0, 0, 0, "green", true, [],
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[[(3.015 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.685) * 25.4, 90, "term35", 2],
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[(3.46 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.69) * 25.4, 90, "term35", 2],
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[(3.91 - 2.7) * 25.4 - 3.5 /2, (4.5 - 3.69) * 25.4, 90, "term35", 2],
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[(3.4 - 2.7) * 25.4, (4.5 - 4.15) * 25.4, 0, "2p54socket", 13, 2],
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], []];
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module pcb_mounts()
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if($preview)
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pcb_mount_assembly(PI_IO, 3);
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else
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pcb_mount(PI_IO);
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pcb_mounts();
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BIN
tests/png/pcb_mount.png
Normal file
BIN
tests/png/pcb_mount.png
Normal file
Binary file not shown.
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