建立方向盘项目初始版本

.gitignore

@@ -0,0 +1,11 @@
+# FreeCAD automatic backups
+*.FCBak
+*.FCStd1
+
+# Python temporary files
+__pycache__/
+*.py[cod]
+
+# Windows file metadata
+Thumbs.db
+desktop.ini

README.md

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+# M9C12 直驱方向盘项目
+
+本页是项目入口。当前方案是 **编码器铜柱版试装方案**，模型和打印文件仍需实物核对；不是已经完成试装或结构强度验证的生产定稿。
+
+## 当前使用
+
+- [总装 FreeCAD](models/assembly_latest_standoff/Assembly.FCStd) · [STEP](models/assembly_latest_standoff/Assembly.step) · [总装预览](models/assembly_latest_standoff/装配全景.png) · [装配说明与限制](models/assembly_latest_standoff/装配说明.md)
+- [当前零件和采购清单](零件清单.md)
+- [3D 打印包（铜柱版）](deliverables/3D打印文件_铜柱版.zip) · [单件和打印说明](deliverables/3D打印文件_铜柱版/打印和装配说明.md)：编码器支架和磁铁座各 1 件，供试装。
+- [方案及历史索引](方案索引.md)：查找参考件、备选和旧方案。
+
+## 目录
+
+| 目录 | 用途 |
+| --- | --- |
+| `models/` | 当前总装、零件、参考模型和历史概念；从零件清单和方案索引进入。 |
+| `deliverables/` | 当前打印包；旧打印包移至 `历史打印方案/`。旧包中的“当前方案”是历史名称，不代表当前状态。 |
+| `images/` | 原始照片和参考图片。 |
+| `scripts/` | 建模、导出、渲染和检查脚本，含历史方案脚本。 |
+
+本次保留 `models` 和 `scripts` 的原路径：既有重建脚本引用这些位置，随意移动会使其失效。历史模型保留不等于仍被采用；未列入当前清单的模型应先核对用途。
+
+## 后续维护约定
+
+1. 普通尺寸修改更新当前零件的原文件，重新导出对应 STEP/STL，更新总装、说明和清单；避免以新文件夹表示每次修改。
+2. 发布打印文件前核对与当前模型一致，并记录用途、数量、版本及试装状态。备选或被替代的包移入历史目录，保留原因。
+3. 重要方案变更记录在方案索引中；不凭修改时间判断是否有效。新建目录仅用于确有独立价值的方案或零件。
+4. 模型尺寸、间隙和检查结果只在说明中列出的假设范围内成立，实物配合和动态强度须另行验证。

deliverables/3D打印文件_铜柱版/打印和装配说明.md

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+# 3D 打印清单：编码器铜柱版
+
+本包只整理当前编码器方案的两个试装打印件。每个 STL 是一个零件，单位为 mm，不要缩放；请打印店分别上传，每件打印 1 个。STEP 供需要时查看或报价，FCStd 用于编辑和查看，不是额外的打印数量。
+
+| 文件 | 数量 | 用途 |
+| --- | --- | --- |
+| 编码器支架_无立柱.stl | 1 | 四个安装孔连接 M4 铜柱，固定 MT6826S 圆形 PCB |
+| 磁铁座_单件.stl | 1 | 用 M3 贯穿螺丝和螺母固定在电机旋转中心轴上，安装 Ø10 × 3 mm 径向充磁磁铁 |
+
+建议选择适合电机周围温度的材料，例如 PETG 或耐温更高的材料；请打印店按所选工艺确认能否打印、材料精度和尺寸。打印时保留所有孔与支承结构，不要擅自封孔或缩放。以上是首次试装件，未经实际切片、打印或实物验证。
+
+## 编码器支架与铜柱
+
+支架平板约 49 × 49 × 3.2 mm，四孔中心位于 PCD 50 mm，孔径 4.4 mm；保留 PCB 的三个 Ø1.8 mm 导孔及原设计承托区域。PCB 直径 33 mm、厚 1.6 mm、芯片突出 0.8 mm 仍是建模假设，PCB 孔距、元件和焊线空间以实物为准。
+
+外购 4 根 M4 公母六角铜柱，柱身 10 mm（不含公牙）、对边约 7 mm。公牙长度必须按电机螺纹的实际有效深度选择，不能仅由 M4×8 判断电机孔深；确保装紧后既不会顶到底，又有足够有效啮合。铜柱固定电机 PCD50 孔，电机的四个小角码另用 PCD76 孔。PCD50 与 PCD76 相位、铜柱及实物角码的配合仍需试装。
+
+建议各铜柱与支架之间先放相同厚度的 1 mm 金属平垫片。10 mm 铜柱 + 1 mm 垫片时，按假设 PCB 厚 1.6 mm、芯片突出 0.8 mm、磁铁表面离电机基准面 7.5 mm 计算，名义间隙约 1.1 mm；实物间隙不一定是此数值。增加四处同厚垫片会增加间隙，减少则减小；不要在不知道间隙时直接通电高速旋转。先断电慢转检查碰擦和偏心，再确认角度及磁场读数。
+
+四颗支架固定螺钉的长度根据支架厚度、平垫片及铜柱母牙深选择，必须有有效咬合且不顶底。三个 PCB 孔按 M2 自攻螺钉的旧版方案设计，实际大小、PCB 固定、焊点和电线是否压住均先试配，避免用力拧裂 PCB。
+
+## 磁铁座
+
+磁铁座原试装模型底部 Ø27 mm、总高 7.5 mm；M3 通孔 Ø3.3 mm，磁铁槽 Ø10.3 × 3 mm。螺丝头按厚 2.2 mm、直径不大于 7.2 mm 假设，实物直径需确认。先检查贯穿螺栓及螺母装配空间，固定磁铁后确认其不会松脱；手动转动检查磁铁居中且不碰芯片。中心孔定位与真实磁场需要实物验证。
+
+## 不在本次打印清单内
+
+- 风扇改为直接固定在 2020 型材上，无需原打印风扇支架。
+- 编码器调距采用购买的金属垫片，无需旧的薄打印垫片与拼接板。
+- 转向灯回正轴套只有概念示意，回正触点位置、拨片形状和键槽相位尚未验证；`回正轴套_仅供参考.png` 不是打印文件。
+- 电机转接盘、70 转接盘和轴承固定板使用金属件，不在本打印清单中。

deliverables/3D打印文件_铜柱版/磁铁座_单件.step

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+#251 = EDGE_CURVE('',#211,#243,#252,.T.);
+#252 = CIRCLE('',#253,5.15);
+#253 = AXIS2_PLACEMENT_3D('',#254,#255,#256);
+#254 = CARTESIAN_POINT('',(0.,0.,5.1));
+#255 = DIRECTION('',(0.,0.,1.));
+#256 = DIRECTION('',(1.,0.,-0.));
+#257 = ORIENTED_EDGE('',*,*,#210,.T.);
+#258 = ORIENTED_EDGE('',*,*,#130,.T.);
+#259 = ORIENTED_EDGE('',*,*,#113,.T.);
+#260 = PLANE('',#261);
+#261 = AXIS2_PLACEMENT_3D('',#262,#263,#264);
+#262 = CARTESIAN_POINT('',(4.5,-1.25,5.1));
+#263 = DIRECTION('',(0.,0.,1.));
+#264 = DIRECTION('',(1.,0.,-0.));
+#265 = ADVANCED_FACE('',(#266),#277,.F.);
+#266 = FACE_BOUND('',#267,.F.);
+#267 = EDGE_LOOP('',(#268,#269,#275,#276));
+#268 = ORIENTED_EDGE('',*,*,#234,.F.);
+#269 = ORIENTED_EDGE('',*,*,#270,.T.);
+#270 = EDGE_CURVE('',#235,#179,#271,.T.);
+#271 = LINE('',#272,#273);
+#272 = CARTESIAN_POINT('',(4.995998398719,1.25,4.5));
+#273 = VECTOR('',#274,1.);
+#274 = DIRECTION('',(0.,0.,1.));
+#275 = ORIENTED_EDGE('',*,*,#178,.T.);
+#276 = ORIENTED_EDGE('',*,*,#105,.F.);
+#277 = PLANE('',#278);
+#278 = AXIS2_PLACEMENT_3D('',#279,#280,#281);
+#279 = CARTESIAN_POINT('',(4.5,1.25,5.1));
+#280 = DIRECTION('',(-0.,1.,0.));
+#281 = DIRECTION('',(0.,0.,1.));
+#282 = ADVANCED_FACE('',(#283,#294),#297,.T.);
+#283 = FACE_BOUND('',#284,.T.);
+#284 = EDGE_LOOP('',(#285));
+#285 = ORIENTED_EDGE('',*,*,#286,.T.);
+#286 = EDGE_CURVE('',#287,#287,#289,.T.);
+#287 = VERTEX_POINT('',#288);
+#288 = CARTESIAN_POINT('',(3.6,-8.817456953861E-16,1.9));
+#289 = CIRCLE('',#290,3.6);
+#290 = AXIS2_PLACEMENT_3D('',#291,#292,#293);
+#291 = CARTESIAN_POINT('',(0.,0.,1.9));
+#292 = DIRECTION('',(0.,0.,1.));
+#293 = DIRECTION('',(1.,0.,-0.));
+#294 = FACE_BOUND('',#295,.T.);
+#295 = EDGE_LOOP('',(#296));
+#296 = ORIENTED_EDGE('',*,*,#153,.F.);
+#297 = PLANE('',#298);
+#298 = AXIS2_PLACEMENT_3D('',#299,#300,#301);
+#299 = CARTESIAN_POINT('',(0.,0.,1.9));
+#300 = DIRECTION('',(0.,0.,1.));
+#301 = DIRECTION('',(1.,0.,-0.));
+#302 = ADVANCED_FACE('',(#303),#326,.F.);
+#303 = FACE_BOUND('',#304,.F.);
+#304 = EDGE_LOOP('',(#305,#306,#307,#308,#316,#323,#324,#325));
+#305 = ORIENTED_EDGE('',*,*,#195,.F.);
+#306 = ORIENTED_EDGE('',*,*,#270,.F.);
+#307 = ORIENTED_EDGE('',*,*,#242,.F.);
+#308 = ORIENTED_EDGE('',*,*,#309,.F.);
+#309 = EDGE_CURVE('',#310,#243,#312,.T.);
+#310 = VERTEX_POINT('',#311);
+#311 = CARTESIAN_POINT('',(5.15,-1.261386203122E-15,4.5));
+#312 = LINE('',#313,#314);
+#313 = CARTESIAN_POINT('',(5.15,-1.261386203122E-15,4.5));
+#314 = VECTOR('',#315,1.);
+#315 = DIRECTION('',(0.,0.,1.));
+#316 = ORIENTED_EDGE('',*,*,#317,.T.);
+#317 = EDGE_CURVE('',#310,#310,#318,.T.);
+#318 = CIRCLE('',#319,5.15);
+#319 = AXIS2_PLACEMENT_3D('',#320,#321,#322);
+#320 = CARTESIAN_POINT('',(0.,0.,4.5));
+#321 = DIRECTION('',(0.,0.,1.));
+#322 = DIRECTION('',(1.,0.,-0.));
+#323 = ORIENTED_EDGE('',*,*,#309,.T.);
+#324 = ORIENTED_EDGE('',*,*,#251,.F.);
+#325 = ORIENTED_EDGE('',*,*,#218,.T.);
+#326 = CYLINDRICAL_SURFACE('',#327,5.15);
+#327 = AXIS2_PLACEMENT_3D('',#328,#329,#330);
+#328 = CARTESIAN_POINT('',(0.,0.,4.5));
+#329 = DIRECTION('',(0.,0.,1.));
+#330 = DIRECTION('',(1.,0.,-0.));
+#331 = ADVANCED_FACE('',(#332),#351,.F.);
+#332 = FACE_BOUND('',#333,.F.);
+#333 = EDGE_LOOP('',(#334,#343,#349,#350));
+#334 = ORIENTED_EDGE('',*,*,#335,.F.);
+#335 = EDGE_CURVE('',#336,#336,#338,.T.);
+#336 = VERTEX_POINT('',#337);
+#337 = CARTESIAN_POINT('',(3.6,-8.817456953861E-16,4.5));
+#338 = CIRCLE('',#339,3.6);
+#339 = AXIS2_PLACEMENT_3D('',#340,#341,#342);
+#340 = CARTESIAN_POINT('',(0.,0.,4.5));
+#341 = DIRECTION('',(0.,0.,1.));
+#342 = DIRECTION('',(1.,0.,-0.));
+#343 = ORIENTED_EDGE('',*,*,#344,.F.);
+#344 = EDGE_CURVE('',#287,#336,#345,.T.);
+#345 = LINE('',#346,#347);
+#346 = CARTESIAN_POINT('',(3.6,-8.817456953861E-16,1.9));
+#347 = VECTOR('',#348,1.);
+#348 = DIRECTION('',(0.,0.,1.));
+#349 = ORIENTED_EDGE('',*,*,#286,.T.);
+#350 = ORIENTED_EDGE('',*,*,#344,.T.);
+#351 = CYLINDRICAL_SURFACE('',#352,3.6);
+#352 = AXIS2_PLACEMENT_3D('',#353,#354,#355);
+#353 = CARTESIAN_POINT('',(0.,0.,1.9));
+#354 = DIRECTION('',(0.,0.,1.));
+#355 = DIRECTION('',(1.,0.,-0.));
+#356 = ADVANCED_FACE('',(#357,#360),#363,.T.);
+#357 = FACE_BOUND('',#358,.T.);
+#358 = EDGE_LOOP('',(#359));
+#359 = ORIENTED_EDGE('',*,*,#317,.T.);
+#360 = FACE_BOUND('',#361,.T.);
+#361 = EDGE_LOOP('',(#362));
+#362 = ORIENTED_EDGE('',*,*,#335,.F.);
+#363 = PLANE('',#364);
+#364 = AXIS2_PLACEMENT_3D('',#365,#366,#367);
+#365 = CARTESIAN_POINT('',(0.,0.,4.5));
+#366 = DIRECTION('',(0.,0.,1.));
+#367 = DIRECTION('',(1.,0.,-0.));
+#368 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3) 
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#372)) GLOBAL_UNIT_ASSIGNED_CONTEXT
+((#369,#370,#371)) REPRESENTATION_CONTEXT('Context #1',
+  '3D Context with UNIT and UNCERTAINTY') );
+#369 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
+#370 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
+#371 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
+#372 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#369,
+  'distance_accuracy_value','confusion accuracy');
+#373 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
+ENDSEC;
+END-ISO-10303-21;

deliverables/历史打印方案/3D打印文件_一体垫片版/打印和裁切说明.md

@@ -0,0 +1,14 @@
+# 一体式 4×4 双厚度垫片
+
+打印 `一体式4x4双厚垫片.stl` **1 份**，单位毫米，保持原比例。它是单个连续实体，没有连接杆；整体外包络 48 × 48 mm。
+
+- 低台阶一半厚 **0.5 mm**，分为 8 片；高台阶一半厚 **1 mm**，分为 8 片。
+- 按图中的虚线分别在距左边及下边 12、24、36 mm 处裁开，每片名义外形为 12 × 12 mm。虚线只是示意，实际 STL 没有割槽、刻线或厚度标记。
+- 每片中心孔为 Ø4.4 mm，保留原设计的 90°扇形开口；单元边缘切开后，开口才能通向外侧。开口的朝向需要按每个安装位置旋转、镜像调整，使缺口对准立柱开口和相邻角码。
+- 裁切前先以台阶分清厚度，裁出后分别标记、装袋。裁切和修边时不要损伤孔口、缺口及厚度基准面，且应计入刀口宽度；切割后的外形不能保证仍为精确 12 × 12 mm。先用一片试裁、试装。
+
+模型按 16 个理想单元切分后，每片在原 Ø12 mm 圆垫片范围内与对应原始垫片形状一致，薄厚交界处切出的薄片没有多余的厚台阶。方形垫片在原模型的四个安装方向下均未与模拟角码相交；最小间隙仍小于 1 mm，实际孔相位、角码和打印误差需试装核对。
+
+请打印商评估厚 0.5 mm 和 1 mm 的薄板能否成形、平整并保持精度。虽然本模型为一块连续板，最终是否按拼接件分类及能否下单由打印商决定；此结构不能保证通过平台检查。尚未进行实物打印、裁切或装配验证。
+
+`一体式4x4双厚垫片.FCStd` 保留薄、厚板及各开孔的特征树，`Parameters` 中厚度可修改并重算；开孔和单元间距的数值按原设计建立，修改布局需检查全部特征。STEP 和 STL 与当前模型一致。构建脚本为 `scripts/build_washer_panel_4x4.py`。

deliverables/历史打印方案/3D打印文件_一体垫片版/打印店清单.md

@@ -0,0 +1,11 @@
+# 打印交付清单：一体垫片版
+
+每个 STL 打印 1 份，单位毫米，不缩放。
+
+- 编码器支架_单件.stl：PCD50 编码器支架，1 件。
+- 磁铁座_单件.stl：直径 10 mm、厚 3 mm 磁铁用的磁铁座，1 件。
+- 一体式4x4双厚垫片.stl：连续板 1 件，理想裁切后可得 0.5 mm 和 1 mm 垫片各 8 片。无连接杆。详见打印和裁切说明及一体板裁切示意图。
+
+垫片板虚线仅在示意图中，STL 无割线，打印后按照示意图人工裁切。裁切有刀口损耗，不得损伤中心孔、缺口及厚度基准面。薄板能否成型、平整及由商家如何分类，须由打印商确认，不能承诺符合活动或拼件规则。
+
+当前风扇固定方案无需打印风扇支架；转向灯回正轴套仍是示意，尚未定稿，未包含在本包。全部文件尚未实物试印和装配。

deliverables/历史打印方案/3D打印文件_双板垫片版/打印和裁切说明.md

@@ -0,0 +1,14 @@
+# 双板垫片：打印与裁切
+
+两块板分别提交，各打印一份，单位 mm，保持原比例：
+
+- 一体垫片板_0.5mm.stl：48 × 24 × 0.5 mm，裁切后 8 个 0.5 mm 垫片。
+- 一体垫片板_1mm.stl：48 × 24 × 1 mm，裁切后 8 个 1 mm 垫片。
+
+每块板均为连续单体，无连接杆。每片按 12 × 12 mm 格子布置，保留原设计的 Ø4.4 mm 螺丝孔及 90° 缺口，裁切后缺口通向外侧。裁切参考：沿长边从端点量 12、24、36 mm 切三刀，沿短边从端点量 12 mm 切一刀；虚线仅在示意图中，STL 没有预制割线。裁切可能产生刀缝及误差，不得损伤孔口和厚度基准面；建议先裁一片试装。
+
+每种厚度各有 8 片，分别标记分袋。编码器四个支点始终采用相同总厚度。按照原模型各片安装角度调整开口朝向后与角码无实体干涉，但模型与实际零件仍可能不同。
+
+尚未实物打印、切割、安装；0.5 mm 薄板的成型、厚度和翘曲由打印商确认。每个文件是单一连续实体，订单分类与能否下单以打印商审核为准。
+
+两个可编辑 FCStd 和 STEP 为对应单板；分别重开验证，每块均为一实体。STL 为闭合单连通网格；按理想格线切出的各片与旧双厚板对应片的几何双向差均为零。

deliverables/历史打印方案/3D打印文件_双板垫片版/打印店清单.md

@@ -0,0 +1,12 @@
+# 打印交付清单：双板垫片版
+
+每个 STL 各打印 1 份，单位毫米，不缩放。
+
+- 编码器支架_单件.stl：PCD50 编码器支架 1 件。
+- 磁铁座_单件.stl：直径 10 mm、厚 3 mm 磁铁用的磁铁座 1 件。
+- 一体垫片板_0.5mm.stl：连续板 1 件，裁切后有 8 片 0.5 mm 垫片。
+- 一体垫片板_1mm.stl：连续板 1 件，裁切后有 8 片 1 mm 垫片。
+
+两块垫片板均为连续单体，没有连接杆。虚线仅在示意图中，STL 没有预制割线；打印后按示意图人工裁切。注意刀口损耗，不得损伤孔、缺口和厚度基准面。请打印商确认 0.5 mm 薄板能否成型和平整，以及订单分类；不能承诺符合其活动或拼件规则。
+
+当前风扇固定方案无需打印风扇支架；转向灯回正轴套仍是示意，尚未定稿，未包含在本包。全部文件尚未实物试印和装配。

deliverables/历史打印方案/3D打印文件_当前方案/打印店说明.md

@@ -0,0 +1,18 @@
+# 3D 打印交付清单（当前方案）
+
+请分别提交 STL，单位 mm，按原尺寸打印，每个文件各打印 1 份：
+
+1. 编码器支架_单件.stl：电机 PCD50 编码器支架 1 件，四个半开放立柱。
+2. 磁铁座_单件.stl：适用于直径 10 mm、厚 3 mm 磁铁的初版座 1 件。
+3. 4x4_混合垫片.stl：0.5 mm 厚垫片 8 片、1 mm 厚垫片 8 片，合计 16 片；相邻垫片用 2 × 2 mm 截面的连接杆相连，杆外缘间名义跨度 2 mm。
+
+4. 120mm风扇支架_V2.stl：120 mm 风扇支架，单体 1 件，风扇安装面朝下、支脚朝上。查看切片并确认支撑及深孔清理；具体说明见风扇支架_打印及装配说明.md。
+
+垫片分组见拼件预览：上两行为 0.5 mm，下两行为 1 mm；颜色仅用于区分，不要求双色。分离之前标记并分袋，剪断杆后修平边缘，不得损伤开口、孔或基准面。请勿缩放或自行加厚薄片。
+
+商家提供的拼件规则要求单文件连接数量少于 10 件，本垫片拼件为 16 件，超过该规则；提交前请打印商确认是否接单。连接杆截面为 2 × 2 mm，但其与薄片的接合厚度仅为 0.5 mm 或 1 mm，商家需核对成型与拆除可行性。拼接件按商家规则不支持工程塑料和金属。
+
+文件尚未实物打印及试装，打印工艺、尺寸误差、孔配合和磁铁间隙需要验证。编码器位置需在 PCB 固定后微调，四个支架脚下使用相同厚度垫片。
+
+120 mm 风扇支架已换成 V2 试装版；其 2020 轨道夹角位置、线缆、风扇电机凸起、安装工具、实际间隙和强度需实物检查，旧版不适用于当前装配。转向灯回正轴套目前只有示意并非打印定稿，因此本包不包含轴套。
+

deliverables/历史打印方案/3D打印文件_当前方案/风扇支架_打印及装配说明.md

@@ -0,0 +1,23 @@
+# 120 mm 风扇支架 V2（试装）
+
+本文件适配 `models/integer_profiles/Assembly.FCStd` 的示意布局：风扇支架直接固定两根电机 2020 型材，每根型材上各有两个固定点。需要打印 `Fan120Mount.stl` 1 件；这是完整的单体支架。FCStd 与 STEP 保存同一支架形状，源构建文件是 `scripts/build_fan120_integer_v2.FCMacro`。
+
+## 相比 V1 的调整
+
+- 原 V1 在当前装配中与两根底部 3030 纵梁及电机底座角码相交，不要把 V1 作为该装配的送印文件。
+- V2 的风扇接触面距 2020 型材上表面 26 mm，原支架为 14 mm；型材固定脚沿型材长度方向改为相距 50 mm，避开电机底座角码。支脚螺钉孔是横向长槽，方便调整两型材间距。
+- 根据简化装配模型，风扇框和支架与当前可见模型没有正体积相交；支架脚与两根 2020 面接触。支架脚与邻近电机角码的名义间隙只有约 1 mm，风扇框底与纵梁端的名义间隙约 2 mm，实际公差可能改变。
+
+## 打印
+
+- 1 个 STL，单位 mm，不缩放。STL 已放在风扇安装面朝下的打印方向，支脚朝上。
+- 支架按 FDM 工艺试装；材料、层高、支撑、边缘和实际公差由打印店根据设备及温度环境确认。不要将拼接垫片的材料限制套用到这个单件。支脚有深孔和局部悬空，请打印商先看切片并确定支撑和孔清理方式。
+- 首次打印和装配前核对风扇为 120 × 120 mm、四安装孔中心距 105 × 105 mm，以及 2020 型材的槽型、中心距及平整度。
+
+## 五金
+
+- 4 颗 M5 螺丝及与实际 2020 槽相配的 M5 滑块，用于连接支架和型材。V2 支脚加高，V1 使用的 M5 × 14 不再适用；可从 M5 × 25 试配，按螺钉头、滑块深度、实际有效啮合与槽底间隙复核，避免顶底。头部需进入约 9.8 mm 宽的沉孔。
+- 4 颗 M4 螺丝和 4 个 M4 螺母固定风扇。25 mm 厚机箱风扇可从 M4 × 35 试配，实际长度取决于风扇安装孔、垫圈、螺母及防护网。
+- 先安装支架并紧固 4 颗型材螺丝，再安装风扇。出风方向朝向电机后部。检查风扇和支架没有接触编码器、线束和旋转件，确认螺母和工具有操作空间。
+
+当前检查采用模型中 120 × 120 × 25 mm 的简化风扇外框；风扇电机凸台、叶片、网罩、接线、真实槽和螺栓均没有完整建模。修改只是提高支架并移动支脚，尚无实物试印、装配或温升测试。轴向增加 12 mm 后风道、风扇与编码器的实际空间及磁场影响需装机检查。

deliverables/历史打印方案/3D打印文件_精简垫片版/打印和裁切说明.md

@@ -0,0 +1,12 @@
+# 一体式 4×2 双厚度垫片（试装版）
+
+打印 `一体式4x2双厚垫片.stl` 1 份，单位毫米，不缩放。板为一个连续实体，没有连接杆，整体 48 × 24 mm；两种厚度各一排，每排 4 片。
+
+- 薄区 0.5 mm：4 片；厚区 1 mm：4 片。四个支点应使用相同总厚度：不垫、0.5 mm、1 mm、或 1.5 mm。每套厚度仅够四个支点一轮使用，没有备用片。
+- 四个支点各垫一片 1 mm 时，总体仅升高 1 mm，不是 4 mm；每处增加垫片时要检查螺丝进牙，若接近或碰触停止，不能通电运行。
+- 裁切按示意虚线，横向一刀、纵向三刀，目标方格 12 × 12 mm。STL 无预制划线。分离前先标识薄厚，切开后分别装袋。刀缝可能使最终尺寸略小，禁止损伤缺口、厚度基准面。先试裁一片。
+- 与原方案一样，孔为 Ø4.4 mm、90° 开口，分开后按立柱开口和角码方向旋转/翻面。四支点与相邻角码几何检查是基于先前 12×12 方案，实物尺寸、装配误差与切割需试装。
+- 0.5 mm 薄区很薄，成型平整度与厚度取决于工艺，打印商需确认可实现；更换材料、尺寸及翘曲可能影响效果。结构是单个整体，但打印商会自行决定是否承接及如何计费。
+- 按前一编码器模型，初装 0.5 mm 时估算磁铁到芯片约 1 mm，1 mm 时估算约 1.5 mm；这些不是实测，因为 PCB 厚度和芯片突出量为假设。先断电手动转动，确认不碰擦，再检查传感器读数。
+
+STL 单个封闭连通件，STEP 和 FCStd 重开为有效实体且形状一致；按理想零刀缝网格切分的 8 片，均与原 4×4 一体板对应垫片完全一致。 尚未完成实物打印、裁切和装配。

deliverables/历史打印方案/3D打印文件_精简垫片版/打印店清单.md

@@ -0,0 +1,13 @@
+# 打印交付清单：精简垫片版
+
+每个 STL 打印 1 份，单位毫米，不缩放。
+
+- 编码器支架_单件.stl：PCD50 编码器支架 1 件。
+- 磁铁座_单件.stl：直径 10 mm、厚 3 mm 磁铁用的磁铁座 1 件。
+- 一体式4x2双厚垫片.stl：连续板 1 件，理想裁切后可得 0.5 mm 和 1 mm 垫片各 4 片。无连接杆，具体参见裁切示意和说明。
+
+垫片板虚线仅在示意图中，STL 无割线，打印后按照示意图人工裁切。裁切有刀口损耗，不得损伤中心孔、缺口及厚度基准面。请打印商确认薄板能否成型、平整，以及如何分类，不能承诺符合其活动或拼件规则。
+
+四个支点必须采用相同厚度，首次试装的磁铁间隙来自模型假设，实物必须校验。0.5 mm 厚板成型精度及翘曲可能影响使用，由打印商确认。
+
+当前风扇固定方案无需打印风扇支架；转向灯回正轴套仍是示意，尚未定稿，未包含在本包。全部文件尚未实物试印和装配。

deliverables/历史打印方案/3D打印文件_风扇直装/打印店说明.md

@@ -0,0 +1,17 @@
+# 编码器支架、磁铁座与垫片：打印店交付清单
+
+请分别上传以下三个 STL，每个文件打印 1 份，单位 mm，保持原尺寸，不要缩放。请先确认订单能否制作，再进行打印。
+
+| 文件 | 内容 | 下单数量 |
+| --- | --- | --- |
+| `编码器支架_单件.stl` | 50 mm 孔圈编码器支架，四根半开放立柱，一体件 | 1 |
+| `磁铁座_单件.stl` | 电机中心磁铁座，一体件，适配 Ø10 × 3 mm 磁铁的初版试装尺寸 | 1 |
+| `4x4_混合垫片.stl` | 4×4 共 16 片：0.5 mm 厚和 1.0 mm 厚各 8 片，相邻片连接成一体 | 1 组 |
+
+垫片参考 `拼件预览.png`：上两行 0.5 mm，下两行 1.0 mm；不同颜色仅用于区分厚度，不要求双色。打印后请在分离之前将两组分别标记，剪断连接杆并修平边缘后分袋。切片软件可能旋转摆放，请根据模型与切片高度核对分组。
+
+连接杆截面为 2 × 2 mm，沿中心线的名义裸露跨度约 2 mm。为了连接，每端嵌入垫片外缘约 0.8 mm，杆总长约 3.6 mm。垫片本体厚度和中心孔、缺口保持原设计；薄片与杆的结合高度仍受 0.5 mm 或 1 mm 垫片本体限制。请确认所选工艺能否可靠成型、拆分，以及薄片厚度和平整度能否满足要求，不要擅自加厚、缩放或修改孔位。
+
+**商家规则确认：**本垫片拼件有 16 片，超过此前提供的“单个拼件少于 10 件”规则，请先确认是否允许下单。拼接件不支持工程塑料和金属，具体可用材料与工艺请由打印商确认。连接杆及其与薄片的接头也请商家审核。
+
+支架的立柱、M4 孔和 PCB 安装孔，以及磁铁座的 M3 通孔、螺丝头凹腔和磁铁槽均为功能结构，请保留。此包尚未针对指定设备切片、实物打印或试装；电机孔位及实际配合尺寸仍需验证。

models/70_m4_drill_plain/build_status.txt

@@ -0,0 +1 @@
+OK

models/70_m4_drill_plain/validation.json

@@ -0,0 +1,52 @@
+{
+  "fcstd_valid": true,
+  "step_valid": true,
+  "fcstd_solids": 1,
+  "step_solids": 1,
+  "step_volume": 22612.0704924005,
+  "bore_count": 24,
+  "bore_diameter_mm": 3.3,
+  "bore_full_depth_mm": 8,
+  "expected_locations_matched": true,
+  "counterbores_removed": true,
+  "source_outline_sections": [
+    {
+      "z": 0.2,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 1,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 2,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 4,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 6,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 7,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    },
+    {
+      "z": 7.8,
+      "source_minus_new_area": 0.0,
+      "new_minus_source_area": 0.0
+    }
+  ],
+  "source_reference_hidden": true,
+  "parameter_angle_test_movement_mm": 0.36651449093170674,
+  "parameter_angle_test_saved": false
+}

models/70_m4_drill_plain/validation_status.txt

@@ -0,0 +1 @@
+OK

models/70_m4_drill_plain/使用说明.md

@@ -0,0 +1,10 @@
+# 70 转接盘：M4 底孔、取消沉头
+
+本版用于嘉立创 CNC 报价识别测试，独立于原盘、真实螺旋牙型版和保留沉头的底孔版。
+
+- PCD 42、48、50.8、70 四圈各六孔，共 24 孔，均改为 Ø3.3 mm、深 8 mm 的圆柱通孔，预期加工为 M4 × 0.7 右旋通牙；STEP 中是光底孔，不包含实体牙型或螺纹语义标注。
+- 原 PCD42 六孔的 Ø6.8 mm 沉头已去掉，两个表面均为普通圆孔。轴心孔 Ø32.5 mm、板厚 8 mm、各组孔位及相位、外轮廓和外缘倒角保持原设计。
+- `70_M4_drill_plain.FCStd` 是参数化模型，可通过 `Parameters` 调整四组 PCD、相位、孔径、厚度和原轮廓缩放；原始 STEP 作为隐藏参考保留。
+- `70_M4_drill_plain.step` 是单零件的报价测试文件。嘉立创能否自动识别及最终显示的孔数、螺纹规格仍需在系统中检查，切勿把识别推测视为已完成。提交前请确认 24 孔均选择 M4 × 0.7 通牙，而非普通光孔。
+- 同目录 `validation.json`：重新读取 STEP 验证 24 处 Ø3.3 圆柱、各 8 mm 贯穿，孔心符合原四组孔位；新旧未钻孔外形在 7 个高度的截面一致；重开 FCStd 及修改后不保存的参数测试通过。
+- 重建脚本：`scripts/rebuild_70_m4_drill_plain.FCMacro`，实现由 `scripts/build_70_m4_drill_plain.py` 对原始参数建模脚本进行受控修改。

models/70_m4_drill_quote/status.txt

@@ -0,0 +1 @@
+OK

models/70_m4_drill_quote/validation.json

@@ -0,0 +1,185 @@
+{
+  "fcstd_valid": true,
+  "fcstd_solids": 1,
+  "step_valid": true,
+  "step_solids": 1,
+  "step_volume": 22483.147383878608,
+  "pilot_diameter_mm": 3.3,
+  "number_pilot_cylinders": 24,
+  "positions_and_extents": [
+    {
+      "x": -0.0,
+      "y": -35.0,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -12.0,
+      "y": -20.78461,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -0.0,
+      "y": -25.4,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -30.310889,
+      "y": -17.5,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -21.997045,
+      "y": -12.7,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 12.0,
+      "y": -20.78461,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 21.997045,
+      "y": -12.7,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 30.310889,
+      "y": -17.5,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -24.0,
+      "y": 0.0,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -30.310889,
+      "y": 17.5,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -21.997045,
+      "y": 12.7,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -12.0,
+      "y": 20.78461,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 24.0,
+      "y": 0.0,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 21.997045,
+      "y": 12.7,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 30.310889,
+      "y": 17.5,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 0.0,
+      "y": 25.4,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 12.0,
+      "y": 20.78461,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 0.0,
+      "y": 35.0,
+      "z_min": 0.0,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -14.849242,
+      "y": -14.849242,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 5.4352,
+      "y": -20.284442,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 20.284442,
+      "y": -5.4352,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -20.284442,
+      "y": 5.4352,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": -5.4352,
+      "y": 20.284442,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    },
+    {
+      "x": 14.849242,
+      "y": 14.849242,
+      "z_min": 1.75,
+      "z_max": 8.0,
+      "r": 1.65
+    }
+  ],
+  "countersink_diameter_mm": 6.8,
+  "countersink_angle_deg": 90,
+  "countersink_depth_mm": 1.75,
+  "pcd42_straight_segment_mm": 6.25,
+  "other_straight_segment_mm": 8.0,
+  "interpretation": "These are smooth pilot holes, not semantic or geometric threads. Automatic quotation recognition untested."
+}

models/70_m4_drill_quote/使用说明.md

@@ -0,0 +1,9 @@
+# 70 转接盘 M4 底孔报价测试版
+
+本文件供嘉立创 CNC 系统识别测试，四圈 PCD42、48、50.8、70 的各 6 个孔改为 **Ø3.3 mm 圆柱通孔**，其余外形、孔位、板厚 8 mm、中心孔继承原参数化模型。PCD42 六孔背面的 Ø6.8 mm、90° 沉头保留，深度调整为 1.75 mm，与 Ø3.3 孔壁相接。
+
+这些孔是**光滑的攻牙底孔**，STEP 没有螺纹实体或螺纹语义标注；设计意图是在这 24 孔加工 M4×0.7 通螺纹，但是否能被报价系统自动识别为螺纹尚未验证。上传后请逐孔检查识别规格与数量，并向加工方明确螺纹要求。
+
+沉头占用高度后，PCD42 孔的 Ø3.3 圆柱段只有 6.25 mm；其余 18 孔圆柱段为 8 mm。是否满足系统识别要求请以上传结果为准，不得声称所有孔均可自动识别。
+
+`validation.json` 包含重新打开模型和 STEP 后的实体有效性检查、24 处 Ø3.3 圆柱及其坐标和轴向范围。此版本未覆盖原模型和实体螺纹版。可用 `scripts/build_70_m4_drill.FCMacro` 重新生成。

models/70_m4_threaded/build_status.txt

@@ -0,0 +1 @@
+OK

models/70_m4_threaded/outline_check.json

@@ -0,0 +1,44 @@
+[
+  {
+    "z": 0.2,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3687.9966638362816,
+    "new_area": 3687.9966638362707
+  },
+  {
+    "z": 1.0,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3893.523160625497,
+    "new_area": 3893.523160625502
+  },
+  {
+    "z": 2.0,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3893.5231606254993,
+    "new_area": 3893.523160625501
+  },
+  {
+    "z": 4.0,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3893.5231606254993,
+    "new_area": 3893.523160625501
+  },
+  {
+    "z": 6.0,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3893.5231606254993,
+    "new_area": 3893.523160625501
+  },
+  {
+    "z": 7.0,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3893.523160625498,
+    "new_area": 3893.523160625502
+  },
+  {
+    "z": 7.8,
+    "symmetric_difference_area": 0.0,
+    "source_area": 3687.9966638362807,
+    "new_area": 3687.996663836271
+  }
+]

models/70_m4_threaded/parameter_check.json

@@ -0,0 +1,17 @@
+{
+  "before": [
+    14.849242404917499,
+    14.849242404917499
+  ],
+  "after": [
+    14.587825779638942,
+    15.106135807111675
+  ],
+  "delta_mm": 0.36651449093170674,
+  "thread_valid": true,
+  "final_valid": true,
+  "final_state": [
+    "Up-to-date"
+  ],
+  "changes_saved": false
+}

models/70_m4_threaded/reference_check.json

@@ -0,0 +1,11 @@
+{
+  "reference": [
+    {
+      "name": "Part__Feature",
+      "label": "Original STEP - reference (hidden)",
+      "visible": false,
+      "valid": true
+    }
+  ],
+  "outer_holes_min_distance_to_outline_at_z4_nominal_m4": 3.0
+}

models/70_m4_threaded/validation.json

@@ -0,0 +1,67 @@
+{
+  "fcstd_valid": true,
+  "fcstd_solids": 1,
+  "fcstd_volume": 22164.462418185798,
+  "fcstd_faces": 1285,
+  "step_valid": true,
+  "step_solids": 1,
+  "step_volume": 22164.465148707764,
+  "step_faces": 1285,
+  "step_surface_types": {
+    "Cylinder": 299,
+    "Plane": 56,
+    "Cone": 72,
+    "BSplineSurface": 858
+  },
+  "thread_feature": {
+    "size": "M4x0.7",
+    "thread_type": "ISOMetricProfile",
+    "threaded": true,
+    "model_thread": true,
+    "depth_type": "ThroughAll",
+    "minor_diameter": 3.3219999999999996,
+    "thread_diameter": 4.0
+  },
+  "circles": 24,
+  "circle_radii": [
+    21.0,
+    21.0,
+    21.0,
+    21.0,
+    21.0,
+    21.0,
+    24.0,
+    24.0,
+    24.0,
+    24.0,
+    24.0,
+    24.0,
+    25.4,
+    25.4,
+    25.4,
+    25.4,
+    25.4,
+    25.4,
+    35.0,
+    35.0,
+    35.0,
+    35.0,
+    35.0,
+    35.0
+  ],
+  "countersink_diameter": "6.8 mm",
+  "countersink_depth": "1.7389999999999999 mm",
+  "plate_thickness": "8.0 mm",
+  "pcd_values": [
+    "42.0 mm",
+    "48.0 mm",
+    "50.8 mm",
+    "70.0 mm"
+  ],
+  "holes_profile_state": [
+    "Up-to-date"
+  ],
+  "final_state": [
+    "Up-to-date"
+  ]
+}

models/70_m4_threaded/使用说明.md

@@ -0,0 +1,19 @@
+# 70 转接板 M4 螺纹版本
+
+本目录是新加工打样版本，不覆盖原始 `70转接板.step` 与 `70转接板_参数化.FCStd`。外轮廓、孔位及原板厚继承原参数化重建模型；原 STEP 仍隐藏保留在 FCStd 内供对照。
+
+- 四圈螺丝孔均为 M4×0.7 右旋通螺纹：PCD 42、48、50.8、70，各 6 孔，共 24 孔；各圈原相位不变。中心 Ø32.5 mm 保持光孔。
+- 原生 `PartDesign::Hole` 的 `Threaded` 和 `ModelThread` 已启用，FCStd 内的 `ThreadHoles` 控制四圈螺纹规格，STEP 中也包含真实螺旋曲面。`Parameters` 表格继续控制厚度、四圈 PCD、起始角、原轮廓整体缩放与倒角。
+- 原 PCD42 六孔的底面沉头保留入口 Ø6.8 mm 和 90°夹角；为了与 M4 模型螺纹底径 Ø3.322 mm 连续衔接，沉头深度从原模型约 1.283 mm 增至约 1.739 mm。`Parameters.HoleDiameter` 只作为沉头锥底的几何参考，不能用来调整螺纹规格；需要改变螺纹时应在 `ThreadHoles` 属性中修改，并同步检查沉头几何。
+- 按名义几何，PCD42 沉头外缘与 Ø32.5 中心孔之间最窄净距约 1.35 mm，供与加工方核对，不构成结构强度结论。
+- FCStd 与 STEP 重新打开后都为有效单实体，螺纹特征显示 `M4x0.7`、`Threaded=True`、`ModelThread=True`；导入 STEP 含螺旋所需的样条曲面。详见 `validation.json`。
+- 实际 CNC 螺纹精度、通规、加工底孔及沉头结合由加工方确认。孔径和旋向应按标注加工，不应把 CAD 中的 Ø3.322 mm 当成必须使用的钻头尺寸。
+
+更新脚本：`scripts/build_70_m4_threaded.py`，可用 `scripts/rebuild_70_m4_threaded.FCMacro` 重建本版本；最终文件对应单一生成版本。
+
+## 附加核验
+
+- `parameter_check.json`：临时把 PCD42 起始角从 45°改到 46°，孔中心随之移动，最终实体有效；更改未保存。
+- `reference_check.json`：原始 STEP 参考仍隐藏且有效；板中部外圈孔以 M4 名义外径计算至外轮廓最小净距约 3 mm。
+- `outline_check.json`：按原 STEP 与未开孔的外轮廓倒角特征在七个高度比较，外边界截面的对称差面积为 0；这项比较仅验证外轮廓，不代表零件强度。
+- `70_M4_isometric.png` 与 `70_M4_thread_detail.png` 分别为等轴测和螺纹局部放大图。

models/M9C12_MT6826S_几何检查.txt

@@ -0,0 +1,3 @@
+Concept only. Assumed dimensions are not production measurements.
+Sensor face to magnet gap: 1.0 mm.
+No positive-volume intersections above 0.001 mm3 in simplified model.

models/M9C12_MT6826S_示意说明.md

@@ -0,0 +1,13 @@
+# M9C12 与 MT6826S 后置安装示意
+
+本总装用于讨论布局，不能直接作为加工或 3D 打印文件。原 `MAD_M9C12.FCStd` 未修改。
+
+- 灰色：原有近似电机模型，后端以平面为基准。
+- 橙色：随中心轴旋转的磁铁座；接触面直径按用户提供的 27 mm 表示。
+- 银色：用户已有的直径 10 mm、厚 3 mm 磁铁，以及示意螺丝。用户已确认磁铁为径向充磁。M3 螺丝头厚度为 2.2 mm，其他紧固件尺寸及贯穿长度为假设。
+- 绿色：直径 33 mm 的 MT6826S 圆形 PCB；板厚 1.6 mm 和芯片外形为占位。芯片朝向磁铁，芯片表面至磁铁表面间隙按 1 mm 示意。
+- 蓝色：固定于 PCD 50 mm 孔圈的编码器支架；孔相位和支架尺寸待实测。M4×8 螺丝仅示意，孔有效深度未确认。
+
+磁铁座厚度 7.5 mm、螺丝头直径、PCB 焊线空间和端部螺母位置均为示意，需按实物调整。示意中的磁铁压在 M3 螺丝头外侧，实际装配时须先锁紧螺丝再安装磁铁，且要解决日后可拆卸问题；螺丝和电机轴对磁场的影响须实测。现有电机模型的凸台、孔位相位等仍有原说明中的限制。厂家推荐厚度为 2.5 mm，现有 3 mm 厚磁铁是否适用需通过磁场和角度实测确定。
+
+简化几何检查未发现超过 0.001 mm³ 的正体积重叠，不代表已完成运动、受力、螺纹、走线或实物装配验证。重建宏 `scripts/rebuild_encoder_concept.FCMacro` 会覆盖本示意总装和视图文件。

models/MAD_M9C12.step

@@ -0,0 +1,762 @@
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+#682 = CARTESIAN_POINT('',(1.5,10.,33.));
+#683 = LINE('',#684,#685);
+#684 = CARTESIAN_POINT('',(1.5,10.,33.));
+#685 = VECTOR('',#686,1.);
+#686 = DIRECTION('',(0.,0.,1.));
+#687 = ORIENTED_EDGE('',*,*,#571,.T.);
+#688 = ORIENTED_EDGE('',*,*,#680,.F.);
+#689 = ORIENTED_EDGE('',*,*,#690,.F.);
+#690 = EDGE_CURVE('',#681,#681,#691,.T.);
+#691 = CIRCLE('',#692,1.5);
+#692 = AXIS2_PLACEMENT_3D('',#693,#694,#695);
+#693 = CARTESIAN_POINT('',(6.123233995737E-16,10.,33.));
+#694 = DIRECTION('',(0.,0.,1.));
+#695 = DIRECTION('',(1.,0.,0.));
+#696 = CYLINDRICAL_SURFACE('',#697,1.5);
+#697 = AXIS2_PLACEMENT_3D('',#698,#699,#700);
+#698 = CARTESIAN_POINT('',(6.123233995737E-16,10.,33.));
+#699 = DIRECTION('',(-0.,-0.,-1.));
+#700 = DIRECTION('',(1.,0.,0.));
+#701 = ADVANCED_FACE('',(#702),#705,.T.);
+#702 = FACE_BOUND('',#703,.F.);
+#703 = EDGE_LOOP('',(#704));
+#704 = ORIENTED_EDGE('',*,*,#615,.F.);
+#705 = PLANE('',#706);
+#706 = AXIS2_PLACEMENT_3D('',#707,#708,#709);
+#707 = CARTESIAN_POINT('',(-1.836970198721E-15,-10.,33.));
+#708 = DIRECTION('',(0.,0.,1.));
+#709 = DIRECTION('',(1.,0.,0.));
+#710 = ADVANCED_FACE('',(#711),#714,.T.);
+#711 = FACE_BOUND('',#712,.F.);
+#712 = EDGE_LOOP('',(#713));
+#713 = ORIENTED_EDGE('',*,*,#640,.F.);
+#714 = PLANE('',#715);
+#715 = AXIS2_PLACEMENT_3D('',#716,#717,#718);
+#716 = CARTESIAN_POINT('',(-10.,1.224646799147E-15,33.));
+#717 = DIRECTION('',(0.,0.,1.));
+#718 = DIRECTION('',(1.,0.,0.));
+#719 = ADVANCED_FACE('',(#720),#723,.T.);
+#720 = FACE_BOUND('',#721,.F.);
+#721 = EDGE_LOOP('',(#722));
+#722 = ORIENTED_EDGE('',*,*,#665,.F.);
+#723 = PLANE('',#724);
+#724 = AXIS2_PLACEMENT_3D('',#725,#726,#727);
+#725 = CARTESIAN_POINT('',(10.,0.,33.));
+#726 = DIRECTION('',(0.,0.,1.));
+#727 = DIRECTION('',(1.,0.,0.));
+#728 = ADVANCED_FACE('',(#729),#732,.T.);
+#729 = FACE_BOUND('',#730,.F.);
+#730 = EDGE_LOOP('',(#731));
+#731 = ORIENTED_EDGE('',*,*,#690,.F.);
+#732 = PLANE('',#733);
+#733 = AXIS2_PLACEMENT_3D('',#734,#735,#736);
+#734 = CARTESIAN_POINT('',(6.123233995737E-16,10.,33.));
+#735 = DIRECTION('',(0.,0.,1.));
+#736 = DIRECTION('',(1.,0.,0.));
+#737 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3) 
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#741)) GLOBAL_UNIT_ASSIGNED_CONTEXT
+((#738,#739,#740)) REPRESENTATION_CONTEXT('Context #1',
+  '3D Context with UNIT and UNCERTAINTY') );
+#738 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
+#739 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
+#740 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
+#741 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#738,
+  'distance_accuracy_value','confusion accuracy');
+#742 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
+ENDSEC;
+END-ISO-10303-21;

models/MAD_M9C12_说明.md

@@ -0,0 +1,19 @@
+# MAD M9C12 电机近似模型
+
+`MAD_M9C12.FCStd` 是可编辑 FreeCAD 模型，`MAD_M9C12.step` 是当前参数下的交换格式快照。模型轴线为 Z 轴，后面板在 Z=0，主体正面在 Z=30 mm；电机主体直径 120 mm、厚 30 mm，均按提供的数据。前方凸台及轴为外观占位，尺寸未测；它们突出于 30 mm 主体之外。前孔从凸台顶面进入。
+
+| 项目 | 当前模型 | 数据性质 |
+| --- | --- | --- |
+| 正中心通孔 | 直径 3 mm，沿轴线贯穿主体、凸台和轴 | 按用户要求；光孔，不建螺纹 |
+| 前面板四孔 | PCD 20 mm、直径 3 mm、首孔 0°、盲孔深 5 mm | 用户确认与转接盘内圈交替四孔对应；孔径、角度、深度待测 |
+| 后面板内圈四孔 | PCD 50 mm、直径 4 mm、首孔 45° | PCD 为直尺粗测，角度待测 |
+| 后面板外圈四孔 | PCD 76 mm、直径 4 mm、首孔 45° | PCD 为直尺粗测，两圈相对角度待测 |
+| 后面板孔深 | 8 mm，盲孔 | 仅为建模占位；M4×8 无论表示 8 个 M4 孔还是 8 mm 长螺钉，都不能据此确定螺纹有效深度 |
+
+所有角度均从正 Z 方向朝原点观察，以 X 正向为 0°，向 Y 正向逆时针递增。孔采用光滑的名义直径表达，不包含螺纹、底孔直径或钻尖。两个后孔圈的 45° 相位只是可修改的假设；在确认前不能作为加工依据。
+
+厂商现行的 [M9C12 IPE V3.1 页面](https://mad-motor.com/products/mad-components-m9c12-ipe-v31waterproof-brushless-motor-drone-sprayer-framing-agriculture-longrange) 所列安装孔与此模型的后面板粗测不同，可能涉及版本差异。建议对照实物测量对角孔中心距（即四孔的 PCD）、孔径、孔圈相对角度和前后可用螺纹深度，再校核螺钉长度与装配干涉。
+
+当前假设的凸台为直径 26 mm、高 8 mm，轴为直径 8 mm、高 6 mm；转接盘中心孔为直径 15 mm、底部凹槽为直径 28 mm、深 2 mm。二者相对位置及电机实物尺寸未确定，孔位对应不代表装配间隙已验证，请实测后判断是否干涉。
+
+在 FreeCAD 中打开 `Parameters` 表修改数值，重新计算并检查模型；`CenterHoleDiameter` 控制中心通孔的直径。参数改动后，STEP 文件不会自动更新。在 FreeCAD 中选中最终 `CenterThrough` 对象后重新导出 STEP；或运行 `scripts/rebuild_mad_m9c12.FCMacro`，按脚本默认值重建并覆盖两个输出文件。修改参数后请另存模型，运行重建宏会恢复脚本默认值。

models/all_new_corner_18_concept/完成.txt

@@ -0,0 +1 @@
+ok