diff --git a/plotter.svg b/plotter.svg
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-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1080 640" width="1080" height="640" role="img" aria-labelledby="title desc">
-  <title id="title">Wandplotter: Geräte und Signalweg</title>
-  <desc id="desc">Medientechnische Zeichnung. Laptop mit Chrome sendet G-code per USB an die SKR Mini E3 V3. Dort läuft Marlin und steuert zwei Schrittmotoren und den Stift-Servo der Gondel.</desc>
-
-  <defs>
-    <marker id="arrow" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="8" markerHeight="8" orient="auto-start-reverse">
-      <path d="M 0 1.5 L 10 5 L 0 8.5 Z" fill="#1a1a1a"/>
-    </marker>
-    <style>
-      .label { font-family: Helvetica, Arial, sans-serif; fill: #1a1a1a; }
-      .small { font-size: 12px; }
-      .tiny { font-size: 11px; fill: #333; }
-      .title { font-size: 18px; font-weight: 700; }
-      .box-title { font-size: 13px; font-weight: 700; }
-      .muted { fill: #555; }
-      .line { fill: none; stroke: #1a1a1a; stroke-width: 1.6; }
-      .thin { fill: none; stroke: #1a1a1a; stroke-width: 1.2; }
-      .dash { fill: none; stroke: #1a1a1a; stroke-width: 1.2; stroke-dasharray: 5 4; }
-      .fill-paper { fill: #f7f5f0; }
-      .fill-device { fill: #ffffff; }
-      .fill-marlin { fill: #f3efe4; }
-    </style>
-  </defs>
-
-  <rect width="1080" height="640" fill="#faf9f6"/>
-
-  <text x="40" y="36" class="label title">Wandplotter  Geräte und Signalweg</text>
-  <text x="40" y="56" class="label tiny muted">p5.js im Browser sendet G-code. Marlin auf dem Controller bewegt die Motoren.</text>
-
-  <!-- Wall / plotter -->
-  <rect x="40" y="78" width="1000" height="268" class="fill-paper" stroke="#1a1a1a" stroke-width="1.2"/>
-  <text x="52" y="98" class="label tiny muted">Wand / Polargraph</text>
-
-  <!-- Motor X -->
-  <rect x="88" y="112" width="118" height="56" class="fill-device" stroke="#1a1a1a" stroke-width="1.6"/>
-  <circle cx="147" cy="140" r="11" fill="none" stroke="#1a1a1a" stroke-width="1.6"/>
-  <circle cx="147" cy="140" r="3" fill="#1a1a1a"/>
-  <text x="147" y="186" text-anchor="middle" class="label box-title">Motor X</text>
-  <text x="147" y="202" text-anchor="middle" class="label tiny muted">links · Riemen links</text>
-
-  <!-- Motor Y -->
-  <rect x="874" y="112" width="118" height="56" class="fill-device" stroke="#1a1a1a" stroke-width="1.6"/>
-  <circle cx="933" cy="140" r="11" fill="none" stroke="#1a1a1a" stroke-width="1.6"/>
-  <circle cx="933" cy="140" r="3" fill="#1a1a1a"/>
-  <text x="933" y="186" text-anchor="middle" class="label box-title">Motor Y</text>
-  <text x="933" y="202" text-anchor="middle" class="label tiny muted">rechts · Riemen rechts</text>
-
-  <!-- Idler line -->
-  <line x1="206" y1="140" x2="874" y2="140" class="thin"/>
-  <text x="540" y="128" text-anchor="middle" class="label tiny muted">Umlenkrollen · Abstand 1660 mm</text>
-
-  <!-- Belts -->
-  <line x1="147" y1="168" x2="540" y2="268" class="line"/>
-  <line x1="933" y1="168" x2="540" y2="268" class="line"/>
-
-  <!-- Gondola -->
-  <rect x="502" y="258" width="76" height="40" class="fill-device" stroke="#1a1a1a" stroke-width="1.6"/>
-  <line x1="540" y1="298" x2="540" y2="318" stroke="#1a1a1a" stroke-width="1.6"/>
-  <line x1="532" y1="318" x2="548" y2="318" stroke="#1a1a1a" stroke-width="2"/>
-  <text x="540" y="338" text-anchor="middle" class="label box-title">Gondel + Stift</text>
-  <text x="540" y="354" text-anchor="middle" class="label tiny muted">Position aus zwei Riemenlängen</text>
-
-  <!-- ========== Signal row ========== -->
-
-  <!-- Laptop -->
-  <rect x="40" y="380" width="280" height="200" class="fill-device" stroke="#1a1a1a" stroke-width="1.8"/>
-  <rect x="58" y="398" width="244" height="118" fill="#eceae4" stroke="#1a1a1a" stroke-width="1.2"/>
-  <text x="180" y="428" text-anchor="middle" class="label box-title">Laptop · Chrome</text>
-  <text x="180" y="450" text-anchor="middle" class="label small">p5.js  ·  WallPlotter.js</text>
-  <text x="180" y="470" text-anchor="middle" class="label tiny muted">zeichnet Linien in Millimetern</text>
-  <text x="180" y="488" text-anchor="middle" class="label tiny muted">Web Serial</text>
-  <rect x="120" y="524" width="120" height="12" fill="#ddd" stroke="#1a1a1a" stroke-width="1"/>
-  <text x="180" y="562" text-anchor="middle" class="label tiny muted">1  Host</text>
-
-  <!-- USB arrow -->
-  <line x1="320" y1="480" x2="398" y2="480" class="line" marker-end="url(#arrow)"/>
-  <text x="360" y="466" text-anchor="middle" class="label box-title">G-code</text>
-  <text x="360" y="500" text-anchor="middle" class="label tiny muted">USB</text>
-
-  <!-- Controller / Marlin -->
-  <rect x="400" y="380" width="300" height="200" class="fill-device" stroke="#1a1a1a" stroke-width="1.8"/>
-  <text x="550" y="408" text-anchor="middle" class="label box-title">Controller  SKR Mini E3 V3</text>
-  <rect x="422" y="424" width="256" height="88" class="fill-marlin" stroke="#1a1a1a" stroke-width="1.4"/>
-  <text x="550" y="452" text-anchor="middle" class="label box-title">Marlin  (Polargraph)</text>
-  <text x="550" y="472" text-anchor="middle" class="label tiny">liest G1 X& Y&  ·  inverse Kinematik</text>
-  <text x="550" y="490" text-anchor="middle" class="label tiny muted">Riemenlängen ’ Schrittimpulse</text>
-  <text x="550" y="536" text-anchor="middle" class="label tiny">Netzteil 24 V  ·  USB nur Daten</text>
-  <text x="550" y="562" text-anchor="middle" class="label tiny muted">2  Steuerung</text>
-
-  <!-- Cables to motors -->
-  <path d="M 480 380 V 220 H 206" class="dash" marker-end="url(#arrow)"/>
-  <text x="250" y="214" class="label tiny">Schritte X</text>
-
-  <path d="M 620 380 V 220 H 874" class="dash" marker-end="url(#arrow)"/>
-  <text x="780" y="214" text-anchor="end" class="label tiny">Schritte Y</text>
-
-  <!-- Servo -->
-  <line x1="550" y1="380" x2="550" y2="300" class="dash" marker-end="url(#arrow)"/>
-  <text x="562" y="248" class="label tiny">Servo Stift</text>
-  <text x="562" y="262" class="label tiny muted">M280</text>
-
-  <!-- Legend -->
-  <rect x="740" y="380" width="300" height="200" class="fill-device" stroke="#1a1a1a" stroke-width="1.2"/>
-  <text x="756" y="408" class="label box-title">Ablauf</text>
-  <text x="756" y="436" class="label small">1  Chrome zeichnet den Pfad</text>
-  <text x="756" y="458" class="label small">2  G-code geht per USB raus</text>
-  <text x="756" y="480" class="label small">3  Marlin auf der SKR rechnet</text>
-  <text x="756" y="502" class="label small">4  Motoren wickeln die Riemen</text>
-  <text x="756" y="524" class="label small">5  Gondel fährt, Stift hebt / senkt</text>
-  <text x="756" y="554" class="label tiny muted">Antwort: Marlin sendet ok zurück</text>
-</svg>