建立方向盘项目初始版本

models/pcd50_open_pillar_v1/DONE.txt

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

models/pcd50_open_pillar_v1/Shim05.step

@@ -0,0 +1,191 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('FreeCAD Model'),'2;1');
+FILE_NAME('Open CASCADE Shape Model','2026-10-28T11:29:19',(''),(''),
+  'Open CASCADE STEP processor 7.8','FreeCAD','Unknown');
+FILE_SCHEMA(('AUTOMOTIVE_DESIGN { 1 0 10303 214 1 1 1 1 }'));
+ENDSEC;
+DATA;
+#1 = APPLICATION_PROTOCOL_DEFINITION('international standard',
+  'automotive_design',2000,#2);
+#2 = APPLICATION_CONTEXT(
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+#5 = PRODUCT_DEFINITION('design','',#6,#9);
+#6 = PRODUCT_DEFINITION_FORMATION('','',#7);
+#7 = PRODUCT('0.5mm C shim; rotate to opening',
+  '0.5mm C shim; rotate to opening','',(#8));
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+#9 = PRODUCT_DEFINITION_CONTEXT('part definition',#2,'design');
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+#174 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
+ENDSEC;
+END-ISO-10303-21;

models/pcd50_open_pillar_v1/Shim10.step

@@ -0,0 +1,191 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('FreeCAD Model'),'2;1');
+FILE_NAME('Open CASCADE Shape Model','2026-10-28T11:29:19',(''),(''),
+  'Open CASCADE STEP processor 7.8','FreeCAD','Unknown');
+FILE_SCHEMA(('AUTOMOTIVE_DESIGN { 1 0 10303 214 1 1 1 1 }'));
+ENDSEC;
+DATA;
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+#2 = APPLICATION_CONTEXT(
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+#5 = PRODUCT_DEFINITION('design','',#6,#9);
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+#7 = PRODUCT('1mm C shim; rotate to opening',
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+ENDSEC;
+END-ISO-10303-21;

models/pcd50_open_pillar_v1/geometry_check.txt

@@ -0,0 +1,14 @@
+50 PCD; 76 corners flush against motor, 2.5mm outboard in 9.5x5.5 slot (width assumed).
+3/4 open pillars outer diameter 12mm, M4 bore 4.4mm; nominal radial wall away from opening 3.8mm.
+Each 90 degree opening faces 22.5 degrees from outward X toward its respective nearby 76mm corner.
+PCB and magnet positions retain nominal 1mm gap with 0.5mm C shims.
+M4x20 bolt without a head washer: nominal motor engagement 5.9mm; actual thread depth unknown.
+minimum pillar/corner distances mm: 0.6463, 0.6463, 0.6463, 0.6463
+Estimated material under 7mm head by sampling mm2: 24.00, 24.00, 24.00, 24.00
+Positive volume intersections >0.001mm3 for support and shims:
+none in checked pairs
+Tool clearance, 7.5mm cylinder:
+tool0: no checked obstruction
+tool1: no checked obstruction
+tool2: no checked obstruction
+tool3: no checked obstruction

models/pcd50_open_pillar_v1/mesh_check.txt

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+EncoderBracket solid=True triangles=7028 volume=7960.40576 zmin=-0.00000
+Shim05 solid=True triangles=196 volume=36.58143 zmin=0.00000
+Shim10 solid=True triangles=196 volume=73.16286 zmin=0.00000

models/pcd50_open_pillar_v1/打印与装配说明.md

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+# 50 mm 孔圈：半开放立柱编码器支架 V1
+
+这是供首次试装的 3D 打印件，基于现有近似电机和编码器模型。角码固定在 76 mm 孔圈并直接贴电机；支架使用 50 mm 孔圈，柱开口面向相邻角码。原电机模型、磁铁座和其他支架文件未修改。
+
+## 文件与打印
+
+| 文件 | 数量 | 内容 |
+| --- | --- | --- |
+| `EncoderBracket.stl` | 1 | 面板和四个连体半开放立柱 |
+| `Shim05.stl` | 4 | 厚 0.5 mm 的开口调整垫片，建议先试装 |
+| `Shim10.stl` | 4 | 厚 1 mm 的开口调整垫片，备用 |
+
+STL 摆向已经调整为面板平放于打印平台、立柱朝上。建议 PETG、主件层高 0.2 mm、至少 3 道外墙；在切片预览确认各柱与面板连接完整，按预览决定是否需要支撑。0.5 mm 垫片建议用 0.1 mm 层高，检查打印厚度及翘曲。
+
+`PrintParts.FCStd` 为打印摆向下的三件实体，位于同一原点；分别选取对象查看或使用单独 STL。对应 STEP 单件及 `Assembly.FCStd` / `Assembly.step` 为交换格式及总装。`bracket.png`、`section.png` 和 `assembly.png` 为支架、剖视及总装视图。FreeCAD 对象是脚本生成的实体特征，不是尺寸表驱动的参数化草图；重建 `scripts/rebuild_pcd50_open_pillar.FCMacro` 会覆盖本目录输出。
+
+## 支架结构和尺寸
+
+- 保留 50 mm 分布圆的四个 M4 固定点。四个立柱与 49 mm 面板一体，外径 12 mm，内孔直径 4.4 mm；每柱约 90° 朝邻近角码方向开放，其余约 270° 保留，完整部分名义径向壁厚为 3.8 mm。开口持续到面板下方，面板上的 M4 孔仍是闭孔，给螺丝头保留承压面。
+- 每柱高度约 10.4 mm、面板厚 3.2 mm；0.5 mm 垫片装在柱与电机之间。脚及垫片仅固定编码器，不承担电机或方向盘的力。
+- PCB 按直径 33 mm、厚 1.6 mm、芯片突出 0.8 mm 的假设设计；三孔使用 M2×4 小自攻螺丝和 Ø1.8 mm 打印导孔，螺丝头按 Ø4 × 1.5 mm 示意。先试配，过紧不要强拧。PCB 背面焊点、元件和实际线缆未建模，必须检查不压线。
+- 磁铁座沿用 `models/encoder_print_v1/MagnetHolder.stl`，不需要因本改动重新打印；磁铁为用户已有的 Ø10 × 3 mm 径向充磁磁铁。
+
+## 间隙与方向
+
+初次在四个立柱下各放一片 **0.5 mm** 垫片。每个垫片都要旋转，使其开口朝向对应立柱的开口及相邻角码；四个开口方向相互镜像，不要简单按每 90° 旋转。四处始终使用相同厚度，以免 PCB 倾斜。
+
+按当前 PCB/芯片假设，0.5 mm 垫片时磁铁表面至芯片表面的名义间隙为 **1 mm**；四处换 1 mm 垫片时名义间隙增加到 **1.5 mm**。这是 CAD 值而非实测值，需断电手动转动确认无擦碰，再读取编码器角度和磁场状态。先通过 PCB 三孔的间隙微调芯片中心，使磁铁和芯片同轴，再轻轻固定 PCB。
+
+## M4 螺丝与角码
+
+当前模型假定角码厚 3 mm、槽长 9.5 mm、槽宽 5.5 mm，两组孔相位均为 45°，角码相对槽中位向外约 2.5 mm；这些几何值仍需实物核实。角码紧贴电机，76 mm 孔的 M4 螺丝配金属垫圈夹紧角码，编码器的塑料垫片不得装到角码和电机之间。按当前模型，柱与相邻角码的最小距离约 0.65 mm，槽端相对直径 4 mm 螺杆余量约 0.25 mm；实际公差可能改变结果。
+
+50 mm 孔需长 M4 螺丝穿过面板和立柱。按模型从电机面到面板上表面 14.1 mm、0.5 mm 脚垫片、不使用螺丝头垫圈计算，M4×20 理论进牙约 5.9 mm；加 0.8 mm 螺丝头垫圈时约 5.1 mm。长螺丝仅作选型候选：电机实际有效螺纹深度未确认，须检查不顶底、并具有足够有效咬合；更换脚垫片厚度或螺丝头垫圈后需重新计算。勿过度拧紧塑料支架。
+
+先将 PCB 装在支架上；将四个调整垫片和支架沿轴向放置并逐颗拧入 50 mm 螺丝，调整中心；随后按实际空间安装并紧固角码。四处开口方向不同，不能假定整件可以单向侧滑套入已装好的全部螺丝。
+
+## 验证范围
+
+`mesh_check.txt` 是三个 STL 的重新加载、闭合及打印高度检查；`geometry_check.txt` 是简化总装中的实体重叠、柱到角码间距、M4 螺丝头承压面和部分工具包络检查。未进行实际切片、打印、实物装配、动态旋转、热变形、螺纹深度或承载试验。角码槽宽、孔圈相位、实际螺丝头及板件尺寸均可能使模型需要调整。