Corrected teardrop_plus() shape to be an accurate compensation for slicer
staircasing and added a plus option to tearslot(), etc. Added horiholes.scad to depict staircase holes.
This commit is contained in:
Chris Palmer
parent
574a73e527
commit
d08d949887
63
readme.md
63
readme.md
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@ -24,18 +24,18 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
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<tr><td> <a href = "#Belts">Belts</a> </td><td> <a href = "#LED_meters">LED_meters</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Carriers">Carriers</a> </td><td> <a href = "#Fillet">Fillet</a> </td><td> <a href = "#Polyholes">Polyholes</a> </td></tr>
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<tr><td> <a href = "#Blowers">Blowers</a> </td><td> <a href = "#LEDs">LEDs</a> </td><td> <a href = "#SCS_bearing_blocks">SCS_bearing_blocks</a> </td><td> <a href = "#Corner_block">Corner_block</a> </td><td> <a href = "#Gears">Gears</a> </td><td> <a href = "#Rounded_rectangle">Rounded_rectangle</a> </td></tr>
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<tr><td> <a href = "#Bulldogs">Bulldogs</a> </td><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#SK_brackets">SK_brackets</a> </td><td> <a href = "#Door_hinge">Door_hinge</a> </td><td> <a href = "#Hanging_hole">Hanging_hole</a> </td><td> <a href = "#Sphere">Sphere</a> </td></tr>
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<tr><td> <a href = "#Buttons">Buttons</a> </td><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#SMDs">SMDs</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Layout">Layout</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
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<tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#SSRs">SSRs</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
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<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
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<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
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<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
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<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
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<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
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<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Springs">Springs</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 = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
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<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
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<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Buttons">Buttons</a> </td><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#SMDs">SMDs</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Horiholes">Horiholes</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
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<tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#SSRs">SSRs</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Layout">Layout</a> </td><td></td></tr>
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<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
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<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
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<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
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<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
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<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
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<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#PSU_shroud">PSU_shroud</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</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 = "#Fans">Fans</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
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<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Transformers">Transformers</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 = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Panel_meters">Panel_meters</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Pillars">Pillars</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Pin_headers">Pin_headers</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td></td><td></td><td></td></tr>
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@ -5287,6 +5287,32 @@ Method to print holes in mid air. See <https://hydraraptor.blogspot.com/2014/03/
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<a href="#top">Top</a>
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---
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<a name="Horiholes"></a>
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## Horiholes
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Utilities for depicting the staircase slicing of horizontal holes made with [`teardrop_plus()`](#teardrops).
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[utils/horiholes.scad](utils/horiholes.scad) Implementation.
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[tests/horiholes.scad](tests/horiholes.scad) Code for this example.
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### Functions
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| Function | Description |
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|:--- |:--- |
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| ```teardrop_plus_x(r, y, h)``` | Calculate the ordinate of a compensated teardrop given y. |
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| ```teardrop_x(r, y)``` | Calculate the ordinate of a teardrop given y. Sweeping y from -r to + r yields the positive X half of the shape. |
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### Modules
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| Module | Description |
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|:--- |:--- |
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| ```horihole(r, z, h = 0, center = true)``` | For making horizontal holes that don't need support material and are correct dimensions |
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<a href="#top">Top</a>
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---
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@ -5859,6 +5885,9 @@ This ensures `hull` and `minkowski` results have the correct dimensions when sph
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For making horizontal holes that don't need support material.
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Small holes can get away without it, but they print better with truncated teardrops.
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Using teardrop_plus() or setting the plus option on other modules will elongate the teardrop vertically by the layer height, so when sliced the staircase tips
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do not intrude into the circle.
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[utils/core/teardrops.scad](utils/core/teardrops.scad) Implementation.
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@ -5867,12 +5896,12 @@ Small holes can get away without it, but they print better with truncated teardr
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### Modules
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| Module | Description |
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|:--- |:--- |
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| ```semi_teardrop(h, r, d = undef, center = true, chamfer = 0)``` | A semi teardrop in the positive Y domain |
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| ```teardrop(h, r, center = true, truncate = true, chamfer = 0)``` | For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging |
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| ```semi_teardrop(h, r, d = undef, center = true, chamfer = 0, plus = false)``` | A semi teardrop in the positive Y domain |
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| ```teardrop(h, r, center = true, truncate = true, chamfer = 0, plus = false)``` | For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging |
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| ```teardrop_chamfer(h, center, chamfer)``` | Helper module for adding chamfer to a teardrop |
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| ```teardrop_plus(h, r, center = true, truncate = true, chamfer = 0)``` | Slightly bigger teardrop to allow for the 3D printing staircase effect |
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| ```tearslot(h, r, w, center = true, chamfer = 0)``` | A horizontal slot that doesn't need support material |
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| ```vertical_tearslot(h, r, l, center = true, chamfer = 0)``` | A vertical slot that doesn't need support material |
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| ```teardrop_plus(h, r, center = true, truncate = true, chamfer = 0)``` | Slightly elongated teardrop to allow for the 3D printing staircase effect |
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| ```tearslot(h, r, w, center = true, chamfer = 0, plus = false)``` | A horizontal slot that doesn't need support material |
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| ```vertical_tearslot(h, r, l, center = true, chamfer = 0, plus = false)``` | A vertical slot that doesn't need support material |
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@ -0,0 +1,86 @@
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//
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// NopSCADlib Copyright Chris Palmer 2020
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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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$layer_height = 0.25;
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include <../utils/core/core.scad>
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use <../utils/horiholes.scad>
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show_disc = true;
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thickness = 3;
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length = 50;
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height = 20;
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overlap_x = 15;
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overlap_y = 5;
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module hole_positions() {
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for($i = [0 : 4], $z = 5 + $i * layer_height / 5, $r = 3)
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translate([5 + $i * 10, $z])
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children();
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for($i = [0 : 4], $z = 15 + $i * layer_height / 5, $r = 0.5 + $i / 2)
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translate([5 + $i * 10, $z])
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children();
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}
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module horiholes_stl(t = thickness) {
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rotate([90, 0, 0])
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difference() {
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linear_extrude(t, center = true) {
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difference() {
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square([length, height]);
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hole_positions()
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horihole($r, $z);
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}
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}
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}
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if(t == thickness)
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translate([length / 2, 0])
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rounded_rectangle([length + 2 * overlap_x, thickness + 2 * overlap_y, 2], 5);
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}
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module horiholes() {
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stl_colour(pp1_colour)
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rotate([-90, 0, 0])
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horiholes_stl(eps);
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if(show_disc)
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hole_positions()
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color(silver)
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cylinder(r = $r, h = eps, center = true, $fn = 360);
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hole_positions()
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color("red")
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linear_extrude(2 * eps, center = true)
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//offset(0.01, $fn = 360)
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intersection() {
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difference() {
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square(8, center = true);
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horihole($r, $z);
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}
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circle($r, $fn = 360);
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}
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}
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if($preview)
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rotate(is_undef($bom) ? 0 : [70, 0, 315])
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horiholes();
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else
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horiholes_stl();
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@ -20,18 +20,24 @@
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//
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//! For making horizontal holes that don't need support material.
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//! Small holes can get away without it, but they print better with truncated teardrops.
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//!
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//! Using teardrop_plus() or setting the plus option on other modules will elongate the teardrop vertically by the layer height, so when sliced the staircase tips
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//! do not intrude into the circle.
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//
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module teardrop(h, r, center = true, truncate = true, chamfer = 0) { //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
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module teardrop_2d(r, truncate) {
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hull() {
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circle4n(r);
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if(truncate)
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translate([0, r / 2])
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square([2 * r * (sqrt(2) - 1), r], center = true);
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else
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polygon([[0, 0], [eps, 0], [0, r * sqrt(2)]]);
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}
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}
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module teardrop(h, r, center = true, truncate = true, chamfer = 0, plus = false) { //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
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module teardrop_2d(r, truncate)
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hull()
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for(y = plus ? [-1 : 1] : 0)
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translate([0, y * (layer_height / 2 - eps)]) {
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circle4n(r);
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if(truncate)
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translate([0, r / 2])
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square([2 * r * (sqrt(2) - 1), r], center = true);
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else
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polygon([[0, 0], [eps, 0], [0, r * sqrt(2)]]);
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}
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render(convexity = 5)
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extrude_if(h, center)
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@ -40,23 +46,23 @@ module teardrop(h, r, center = true, truncate = true, chamfer = 0) { //! For mak
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teardrop_chamfer(h, center, chamfer) {
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linear_extrude(eps, center = true)
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teardrop_2d(r + chamfer / 2, truncate);
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translate_z(-chamfer / 2)
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linear_extrude(eps, center = true)
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teardrop_2d(r, truncate);
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}
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}
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module semi_teardrop(h, r, d = undef, center = true, chamfer = 0) { //! A semi teardrop in the positive Y domain
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module semi_teardrop_2d(r, d) {
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module semi_teardrop(h, r, d = undef, center = true, chamfer = 0, plus = false) { //! A semi teardrop in the positive Y domain
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module semi_teardrop_2d(r, d)
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intersection() {
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R = is_undef(d) ? r : d / 2;
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teardrop(r = R, h = 0);
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teardrop(r = R, h = 0, plus = plus);
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sq = R + 1;
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translate([-sq, 0])
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square([2 * sq, sq]);
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}
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}
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render(convexity = 5)
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extrude_if(h, center)
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@ -65,22 +71,21 @@ module semi_teardrop(h, r, d = undef, center = true, chamfer = 0) { //! A semi t
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teardrop_chamfer(h, center, chamfer) {
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linear_extrude(eps, center = true)
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semi_teardrop_2d(r + chamfer / 2, d);
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translate_z(-chamfer / 2)
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linear_extrude(eps, center = true)
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semi_teardrop_2d(r, d);
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}
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}
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module teardrop_plus(h, r, center = true, truncate = true, chamfer = 0) //! Slightly bigger teardrop to allow for the 3D printing staircase effect
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teardrop(h, r + layer_height / 4, center, truncate, chamfer);
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module teardrop_plus(h, r, center = true, truncate = true, chamfer = 0) //! Slightly elongated teardrop to allow for the 3D printing staircase effect
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teardrop(h, r, center, truncate, chamfer, plus = true);
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module tearslot(h, r, w, center = true, chamfer = 0) { //! A horizontal slot that doesn't need support material
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module tearslot_2d(r, w) {
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hull() {
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translate([-w / 2, 0]) teardrop(r = r, h = 0);
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translate([w / 2, 0]) teardrop(r = r, h = 0);
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}
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}
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module tearslot(h, r, w, center = true, chamfer = 0, plus = false) { //! A horizontal slot that doesn't need support material
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module tearslot_2d(r, w)
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hull()
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for(x = [-1, 1])
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translate([x * w / 2, 0]) teardrop(r = r, h = 0, plus = plus);
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extrude_if(h, center)
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tearslot_2d(r, w);
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|
|
@ -88,19 +93,19 @@ module tearslot(h, r, w, center = true, chamfer = 0) { //! A horizontal slot tha
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|||
teardrop_chamfer(h, center, chamfer) {
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||||
linear_extrude(eps, center = true)
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||||
tearslot_2d(r + chamfer / 2, w);
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||||
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||||
translate_z(-chamfer / 2)
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||||
linear_extrude(eps, center = true)
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||||
tearslot_2d(r, w);
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||||
}
|
||||
}
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||||
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||||
module vertical_tearslot(h, r, l, center = true, chamfer = 0) { //! A vertical slot that doesn't need support material
|
||||
module vertical_tearslot_2d(r, l) {
|
||||
hull() {
|
||||
translate([0, l / 2]) teardrop(0, r, true);
|
||||
translate([0, -l / 2]) circle4n(r);
|
||||
}
|
||||
}
|
||||
module vertical_tearslot(h, r, l, center = true, chamfer = 0, plus = false) { //! A vertical slot that doesn't need support material
|
||||
module vertical_tearslot_2d(r, l)
|
||||
hull()
|
||||
for(y = [-1, 1])
|
||||
translate([0, y * l / 2])
|
||||
teardrop(0, r, true, plus = plus);
|
||||
|
||||
extrude_if(h, center)
|
||||
vertical_tearslot_2d(r, l);
|
||||
|
|
@ -108,6 +113,7 @@ module vertical_tearslot(h, r, l, center = true, chamfer = 0) { //! A vertical s
|
|||
teardrop_chamfer(h, center, chamfer) {
|
||||
linear_extrude(eps, center = true)
|
||||
vertical_tearslot_2d(r + chamfer / 2, l);
|
||||
|
||||
translate_z(-chamfer / 2)
|
||||
linear_extrude(eps, center = true)
|
||||
vertical_tearslot_2d(r, l);
|
||||
|
|
@ -123,4 +129,3 @@ module teardrop_chamfer(h, center, chamfer) { //! Helper module for adding chamf
|
|||
hull()
|
||||
children();
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,49 @@
|
|||
//
|
||||
// NopSCADlib Copyright Chris Palmer 2020
|
||||
// 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/>.
|
||||
//
|
||||
|
||||
//
|
||||
//! Utilities for depicting the staircase slicing of horizontal holes made with [`teardrop_plus()`](#teardrops).
|
||||
//
|
||||
include <../utils/core/core.scad>
|
||||
|
||||
function teardrop_x(r, y) = //! Calculate the ordinate of a teardrop given y. Sweeping y from -r to + r yields the positive X half of the shape.
|
||||
let(x2 = sqr(r) - sqr(y))
|
||||
y > r / sqrt(2) ? y >= r ? 0
|
||||
: r * sqrt(2) - y
|
||||
: x2 > 0 ? sqrt(x2)
|
||||
: 0;
|
||||
|
||||
function teardrop_plus_x(r, y, h) = //! Calculate the ordinate of a compensated teardrop given y.
|
||||
y < -h ? teardrop_x(r, y + h)
|
||||
: y > h ? teardrop_x(r, y - h)
|
||||
: r;
|
||||
|
||||
module horihole(r, z, h = 0, center = true) { //! For making horizontal holes that don't need support material and are correct dimensions
|
||||
bot_layer = floor((z - r) / layer_height);
|
||||
top_layer = ceil((z + r) / layer_height);
|
||||
render(convexity = 5)
|
||||
extrude_if(h, center)
|
||||
for(i = [bot_layer : top_layer]) {
|
||||
Z = i * layer_height;
|
||||
x = teardrop_plus_x(r, Z - z + layer_height / 2, layer_height / 2);
|
||||
if(x > 0)
|
||||
translate([-x, Z - z])
|
||||
square([2 * x, layer_height]);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue