From f8294d6d47ea435e62bd75063d56d049a6422252 Mon Sep 17 00:00:00 2001 From: Rahix Date: Fri, 30 May 2025 13:16:24 +0200 Subject: [PATCH 1/3] Add drawings --- MiscParts.FCStd | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/MiscParts.FCStd b/MiscParts.FCStd index c086ed9..c6d87ee 100644 --- a/MiscParts.FCStd +++ b/MiscParts.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:d76f4d1efa46b49db343609a48f73a4c7e8962715cb09de34ec68986354cec1a -size 218853 +oid sha256:2e55773359ace46370f9dd794b408f73a1ea1cede2141e687ca299e1ec2f87b5 +size 246385 From 2df8b914d25d22fe927d500219292a5d33a654a7 Mon Sep 17 00:00:00 2001 From: Rahix Date: Sat, 31 May 2025 21:17:27 +0200 Subject: [PATCH 2/3] Fix spring dimensioning calc error We have 4 springs, so the effective spring constant is 4 times higher. Reflect this in the calculations and adjust the CAD model for the updated spring length. --- FootBracket.FCStd | 4 ++-- MiscParts.FCStd | 4 ++-- Profiles.FCStd | 4 ++-- STM-Cage.FCStd | 4 ++-- STM-Frame.FCStd | 4 ++-- STM.FCStd | 4 ++-- Spring-Dimensioning.ipynb | 16 +++++++++++----- 7 files changed, 23 insertions(+), 17 deletions(-) diff --git a/FootBracket.FCStd b/FootBracket.FCStd index df92892..8c989e7 100644 --- a/FootBracket.FCStd +++ b/FootBracket.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:419a7f9d1609126ba83677047168d9d12095f87d7a9aa4857486e1d8660c9d2f -size 810379 +oid sha256:8beaa499e84d1df72b27edc59d55c35ef5ae3d4fb872a1807c46ca4348156abe +size 805743 diff --git a/MiscParts.FCStd b/MiscParts.FCStd index c6d87ee..467034c 100644 --- a/MiscParts.FCStd +++ b/MiscParts.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:2e55773359ace46370f9dd794b408f73a1ea1cede2141e687ca299e1ec2f87b5 -size 246385 +oid sha256:593d49b1eda0b1ed7c285e48bbabd48f0ba9edd402539374c44e63f11b6b94b0 +size 246982 diff --git a/Profiles.FCStd b/Profiles.FCStd index a3f88a3..7d60262 100644 --- a/Profiles.FCStd +++ b/Profiles.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:d8ed7527f7a7d33051fbc867196fd9624c5dd4bc2fcb3c0d7caf6f21a8037e53 -size 989972 +oid sha256:6d5483458e7b2af03d98394694a9707e1e9dd7abedcd66e1dac358be605f20de +size 988522 diff --git a/STM-Cage.FCStd b/STM-Cage.FCStd index 11073cd..c67c3e7 100644 --- a/STM-Cage.FCStd +++ b/STM-Cage.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:c5f4fa18f0927805fd459e59cd1667f2482e46f14e270c64675f48e549513140 -size 101735 +oid sha256:fd5fad41c6526ae8906f4bc6d18e1dd630e5c027b819668162d5d639b2f70137 +size 91608 diff --git a/STM-Frame.FCStd b/STM-Frame.FCStd index 5ef4239..ce083be 100644 --- a/STM-Frame.FCStd +++ b/STM-Frame.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:e0f59094da70d2c345f1553c198cf7a1bee965c7cf2a2f783a1c326b01f2bbae -size 157931 +oid sha256:323b9464fdf6d2e929e772fc6ab9a9885343352f82a026d029752db45b167e0e +size 163279 diff --git a/STM.FCStd b/STM.FCStd index 49bc1d4..eae1607 100644 --- a/STM.FCStd +++ b/STM.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:7bcd65c0d56bc50dd3369d5b6b39950f905b92aa323b92db80ebdc1ea5792c92 -size 87244 +oid sha256:a1754ac24038bb9722db6b8c2e160dd936f6ad3ca7a90744663bfe5f009d5603 +size 81952 diff --git a/Spring-Dimensioning.ipynb b/Spring-Dimensioning.ipynb index 0793aa7..7bd44e8 100644 --- a/Spring-Dimensioning.ipynb +++ b/Spring-Dimensioning.ipynb @@ -2,7 +2,7 @@ "cells": [ { "cell_type": "code", - "execution_count": 17, + "execution_count": 1, "id": "5bef2913-4855-471d-9594-5ec45c029048", "metadata": {}, "outputs": [ @@ -10,8 +10,8 @@ "name": "stdout", "output_type": "stream", "text": [ - "Length: 236.9 mm\n", - "Freq: 1.411 Hz\n" + "Length: 143.2 mm\n", + "Freq: 2.822 Hz\n" ] } ], @@ -19,7 +19,7 @@ "import math\n", "\n", "# Parameters\n", - "spring_constant_n_mm = 1.1\n", + "spring_constant_n_mm = 1.1 * 4\n", "spring_length_resting_mm = 112\n", "\n", "def spring_length_at(weight):\n", @@ -39,7 +39,13 @@ "cell_type": "code", "execution_count": null, "id": "f21d84d9-c7a1-4fd2-aa32-136f04db32e5", - "metadata": {}, + "metadata": { + "editable": true, + "slideshow": { + "slide_type": "" + }, + "tags": [] + }, "outputs": [], "source": [] } From cf2a505b8d5051ce7c0d3d9191d6bebcf448f6e4 Mon Sep 17 00:00:00 2001 From: Rahix Date: Fri, 6 Jun 2025 21:29:56 +0200 Subject: [PATCH 3/3] Detail the sheet metal box for the STM --- CAD-Screenshot.png | 4 +-- Connector-Plate.ipynb | 76 +++++++++++++++++++++++++++++++++++++++++++ STM-Box.FCStd | 4 +-- STM-Cage.FCStd | 4 +-- STM-Frame.FCStd | 4 +-- 5 files changed, 84 insertions(+), 8 deletions(-) create mode 100644 Connector-Plate.ipynb diff --git a/CAD-Screenshot.png b/CAD-Screenshot.png index 88bf938..6f6ae9d 100644 --- a/CAD-Screenshot.png +++ b/CAD-Screenshot.png @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:11835bf16a19b2d5d5a233f67fa6fb8e3d7bff80e75f1d029c03628ce32439eb -size 496656 +oid sha256:98cda5b8243ed56c48aeaea16887a965a9791b345f24a60efb5d52fcfeb358ee +size 440376 diff --git a/Connector-Plate.ipynb b/Connector-Plate.ipynb new file mode 100644 index 0000000..de29462 --- /dev/null +++ b/Connector-Plate.ipynb @@ -0,0 +1,76 @@ +{ + "cells": [ + { + "cell_type": "code", + "execution_count": 20, + "id": "e70e1154-7d5d-4c92-9f62-2dd2c734f586", + "metadata": { + "editable": true, + "slideshow": { + "slide_type": "" + }, + "tags": [] + }, + "outputs": [ + { + "data": { + "text/html": [ + "171.312323780292 kg" + ], + "text/latex": [ + "$171.312323780292\\ \\mathrm{kg}$" + ], + "text/plain": [ + "" + ] + }, + "execution_count": 20, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "from pint import UnitRegistry\n", + "unit = UnitRegistry()\n", + "unit.formatter.default_format = \"~\"\n", + "\n", + "preload_m4 = 3000 * unit.N\n", + "n_screws = 4 # 2 on each side\n", + "friction_coeff = 0.21 # Al on Al\n", + "safety_factor = 1.5\n", + "\n", + "max_load = preload_m4 * friction_coeff * n_screws / safety_factor / unit.standard_gravity\n", + "max_load.to(unit.kg)" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "d945d6aa-a1d0-4f9b-8f0e-2742e5c75b31", + "metadata": {}, + "outputs": [], + "source": [] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 3 (ipykernel)", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.13.3" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/STM-Box.FCStd b/STM-Box.FCStd index ccbdaf7..eccbc3f 100644 --- a/STM-Box.FCStd +++ b/STM-Box.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:92d4927c2f971f2c398feecb7f935f43dc7e1b7b7637415d4570deb624f51ef8 -size 622329 +oid sha256:a205bb021ced172bbef530c74f8c1bfe7e05f8fcf3e313cddbf0e3dbe449a49e +size 2369039 diff --git a/STM-Cage.FCStd b/STM-Cage.FCStd index c67c3e7..957c9dd 100644 --- a/STM-Cage.FCStd +++ b/STM-Cage.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:fd5fad41c6526ae8906f4bc6d18e1dd630e5c027b819668162d5d639b2f70137 -size 91608 +oid sha256:08c9794709f749c445fc48b942918b8244e20c9f9194d4dbd9b92165feca5fb7 +size 112730 diff --git a/STM-Frame.FCStd b/STM-Frame.FCStd index ce083be..54fd0de 100644 --- a/STM-Frame.FCStd +++ b/STM-Frame.FCStd @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:323b9464fdf6d2e929e772fc6ab9a9885343352f82a026d029752db45b167e0e -size 163279 +oid sha256:b4e0062c81a954c36900fadf743167d0697baf51f217d3e6a93e12dc9215a9b1 +size 162739