From cf2a505b8d5051ce7c0d3d9191d6bebcf448f6e4 Mon Sep 17 00:00:00 2001
From: Rahix <rahix@rahix.de>
Date: Fri, 6 Jun 2025 21:29:56 +0200
Subject: [PATCH] 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": [
+       "<Quantity(171.312324, 'kilogram')>"
+      ]
+     },
+     "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