Öffne eine 3D-Datei über Datei öffnen… oder ziehe sie einfach ins Fenster. Das Modell wird sofort angezeigt und automatisch geprüft. Links siehst du Maße, Volumen, Gewicht und das Prüfergebnis.
Typischer Ablauf: Öffnen → Prüfung ansehen → Reparieren → Aufs Druckbett legen → als STL/3MF exportieren.
▶ Video-Anleitung: 3D Viewer & Reparatur – Prüfen, Reparieren, Analysieren, Texturieren am Beispiel eines beschädigten Benchy (YouTube, ca. 7 Min.). Der Link (auch oben über ▶ Video) öffnet YouTube in einem neuen Tab und braucht Internet; vorher werden keine Daten an YouTube übertragen.
✕ Schließen entfernt die aktuelle Datei und leert Ansicht, Prüfung, Protokoll und Rückgängig-Verlauf. Wurde das Modell repariert oder verändert und danach noch nicht exportiert, fragt das Tool vorher nach – ebenso beim Öffnen einer anderen Datei und beim Schließen des Browser-Tabs. Die Originaldatei auf der Festplatte wird nie verändert.
Die kleinen ● Info-Punkte an den Buttons zeigen beim Überfahren eine Kurzinfo. Ein Klick auf den Punkt springt direkt in den passenden Abschnitt dieser Hilfe. Die Punkte lassen sich unten links ausblenden.
| STL | Binär und ASCII. Das Standardformat für 3D-Druck. Einheit: mm. |
| 3MF | Modernes Druckformat (PrusaSlicer, Bambu Studio, Cura, Windows). Mehrere Objekte werden zusammengeführt. |
| OBJ | Universelles 3D-Format (Blender u. a.). Materialien/Texturen werden ignoriert. |
| PLY | Häufig von 3D-Scannern. Nur PLY mit Dreiecksflächen – reine Punktwolken (z. B. aus websfm/COLMAP) werden erkannt und mit einem Hinweis abgewiesen. |
| GLB / GLTF | Web- und Windows-3D-Format, auch Draco-komprimiert. Wird automatisch von Y-oben auf Z-oben gedreht. GLTF nur als eingebettete Datei (ohne separate .bin-Dateien). |
| FBX | Austauschformat aus Animations-Programmen. Wird ebenfalls auf Z-oben gedreht. |
| STEP / STP | CAD-Austauschformat (Fusion, SolidWorks, Inventor, FreeCAD …). Enthält exakte Flächen statt Dreiecken – der Viewer rechnet sie beim Öffnen mit dem OpenCascade-Kern in ein feines Dreiecksnetz um (Einheit automatisch in mm). Beim ersten Öffnen wird der Kern geladen (ca. 7,6 MB), das dauert einen Moment. Mehrere Teile einer Baugruppe werden zu einem Körper zusammengeführt. |
| IGES / IGS, BREP | Ältere CAD-Formate, gleiche Umrechnung wie STEP. IGES enthält oft nur lose Flächen – dann meldet die Prüfung Löcher, „Reparieren“ schließt sie meist. |
Das Tool geht immer von Millimetern aus. Wirkt ein Modell winzig, war es vermutlich in Zoll gespeichert → inch→mm, oder – bei Handy-Scans – in Meter → m→mm. Unter 2 cm Größe erscheint beim Laden ein Hinweis im Protokoll.
Mit dem 3D-Viewer-Starter öffnest du STL-Dateien (und 3MF, OBJ, PLY, GLB, GLTF, FBX, STEP, IGES) direkt aus dem Explorer per Doppelklick oder Rechtsklick → Öffnen mit – wie früher mit dem Windows 3D-Viewer.
Einrichten (einmalig pro PC):
Alternative ohne Registrieren: Rechtsklick auf eine STL → Öffnen mit → Andere App auswählen → Nach einer App auf diesem PC suchen → 3D-Viewer-Starter.exe wählen.
Entfernen: Entfernen.cmd ausführen. Wird der Ordner verschoben, einfach Registrieren.cmd erneut ausführen.
| Linke Maustaste ziehen | Drehen |
| Rechte Maustaste ziehen | Verschieben |
| Mausrad | Zoomen |
| Doppelklick aufs Modell | Drehpunkt auf diese Stelle setzen |
| F | Einpassen |
| 1 … 7 | Iso, Vorne, Hinten, Links, Rechts, Oben, Unten |
| W | Drahtgitter |
| M | Messen |
| H / F1 | Hilfe |
| Strg+Z | Rückgängig |
| Esc | Hilfe schließen |
Iso zeigt das Modell schräg von vorne oben. Vorne, Hinten, Links, Rechts, Oben, Unten schauen genau entlang einer Achse. Einpassen holt das Modell wieder vollständig ins Bild. Das kleine Achsenkreuz oben rechts zeigt die Ausrichtung: X magenta, Y gelb, Z blau (Z = oben, wie beim Drucker).
Schneidet das Modell entlang X, Y oder Z auf. Mit dem Schieberegler wählst du die Position, mit umkehren die Seite. So prüfst du Wandstärken, Hohlräume und innere Strukturen. Die Schnittfläche erscheint magenta, weil man ins Innere (die Rückseiten) schaut.
Messen einschalten und nacheinander zwei Punkte auf dem Modell anklicken. Unten rechts erscheinen der direkte Abstand sowie ΔX, ΔY und ΔZ in mm. Ein dritter Klick startet eine neue Messung. Zum Drehen einfach ziehen – nur ein kurzer Klick setzt einen Messpunkt.
Die gemessene Strecke wird automatisch ins Feld Soll-Maß übernommen. So kannst du Scans maßhaltig machen → siehe Transformieren › Auf Messmaß skalieren.
Die Auswahl bestimmt die Dichte für die Gewichtsberechnung. Enthalten sind gängige Filamente (PLA, PLA+, PETG, PET, PCTG, ABS, ASA, HIPS), flexible (TPU, TPE), technische (PC, PA/Nylon, PP, POM, PEI, PEEK), faserverstärkte (CF = Carbonfaser, GF = Glasfaser) und Spezialfilamente sowie Resine. Mit Eigene Dichte … gibst du den Wert vom Datenblatt deines Herstellers ein.
Die Filamentlänge wird aus dem Volumen und dem gewählten Durchmesser (1,75 oder 2,85 mm) berechnet. Bei Resin entfällt sie.
Ein druckbares Modell muss eine geschlossene, eindeutige Hülle sein. Symbole: ✓ in Ordnung, ! Hinweis (meist trotzdem druckbar), ✗ Fehler.
Reparieren führt alle angehakten Schritte nacheinander aus und prüft das Modell danach neu. Unter dem Button steht ein Protokoll, was geändert wurde. Mit Rückgängig kommst du jederzeit zurück. Die Standard-Auswahl ist für die meisten Modelle richtig.
Die Schritte laufen automatisch mehrfach hintereinander (bis zu 5 Durchläufe), solange sich das Ergebnis noch verbessert.
Der Rettungsanker, wenn „Reparieren“ nicht reicht – typisch bei Modellen mit sich überlappenden oder durchdringenden Flächen, Innenwänden oder verunglückten Verschneidungen (z. B. Ausschnitte in gerundeten Wänden aus SketchUp). Solche Fehler lassen sich durch Flicken der Oberfläche grundsätzlich nicht beheben.
Stattdessen wird das Modell komplett neu erzeugt:
Färbt das Modell nach druckrelevanten Eigenschaften ein. Die Berechnung läuft im Hintergrund; eine Legende oben links in der Ansicht zeigt die Flächenanteile. Ein zweiter Klick auf den Button schaltet die Analyse wieder aus. Ändert sich das Modell (z. B. Drehen, Reparieren, Textur), wird automatisch neu gerechnet; Grenzwerte zu ändern färbt sofort neu, ohne neue Rechnung. Die Analyse funktioniert auch zusammen mit der Schnitt-Ansicht.
Das Tool prüft und repariert die Technik exakt – was es nicht wissen kann, ist, was du mit dem Design erreichen willst: Ist ein Loch ein gewolltes Fenster? Reicht 1 mm Wand für diesen Zweck? Passt die Platine hinein? Dafür kann eine KI wie Claude als zweiter Prüfer helfen.
Bringt eine Struktur als echte Geometrie auf die Oberfläche – z. B. Rändel für griffige Knöpfe, Waben oder Karbon-Optik für Gehäuse, Stein für Deko. Das Ergebnis wird mitgedruckt, der Slicer braucht keine Zusatzfunktion. Die Berechnung läuft im Hintergrund mit Fortschrittsanzeige (Abbrechen / Esc); mit Rückgängig kommst du jederzeit zurück.
Ablauf intern: Das Netz wird fein unterteilt, das Muster auf die Form projiziert, jeder Punkt entlang seiner Normalen verschoben und das Ergebnis anschließend wieder vereinfacht (Abweichung höchstens 5 % der Musterhöhe).
Jede Reparatur und Transformation kann zurückgenommen werden (Strg+Z, bis zu 15 Schritte). Beim Öffnen einer neuen Datei wird der Verlauf gelöscht.
Transformationen verändern das Modell selbst und werden beim Export übernommen.
Die Dateien landen im Download-Ordner des Browsers, mit dem Zusatz _repariert im Namen. Die Originaldatei wird nie verändert.
3D Viewer & Reparatur V2.3
Christian Eigner · trueillusionproject.eu
Ersatz für den Windows 3D-Viewer mit Druckprüfung und automatischer Reparatur. Läuft vollständig lokal im Browser.
3D-Engine: three.js r160 – Copyright © 2010–2023 three.js authors, MIT-Lizenz. Draco-Decoder: Google, Apache-2.0-Lizenz. CAD-Import: occt-import-js / Open CASCADE Technology, LGPL-2.1. Details und vollständige Lizenztexte unter Nutzungsbedingungen & Lizenzen.
© 2026 Christian Eigner · trueillusionproject.eu – Kontakt: project.admin@trueillusionproject.eu
Fremdbibliotheken (in der Datei enthalten):
CAD-Kern (nicht in der Datei, sondern als eigener Ordner occt daneben; wird nur beim Öffnen von STEP/IGES/BREP geladen):
Die LGPL erlaubt dir, diese Bibliothek durch eine andere (z. B. selbst übersetzte) Fassung zu ersetzen: einfach die Dateien im Ordner occt austauschen. Die Einschränkungen in Punkt 3 gelten für diesen Ordner nicht.
The MIT License Copyright © 2010-2023 three.js authors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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