Why Create 3D Assembly Animations?
Static 2D drawings have long been the standard for assembly instructions and service manuals. But when a technician is on the shop floor trying to understand how 30 parts fit together, a sequence of flat line drawings with callouts can be confusing and error-prone.
Interactive 3D assembly animations solve this. They let the end user:
- Rotate and zoom around the model at any step
- Step forward and backward through assembly or disassembly sequences
- Hide/show components to see internal details
- View the Bill of Materials (BOM) tied directly to each part
SOLIDWORKS Composer is the industry-leading tool for creating exactly this kind of content — without needing to learn animation software like 3ds Max or Blender. It works directly from your existing 3D CAD data.
What is SOLIDWORKS Composer?
SOLIDWORKS Composer is a technical communication application from Dassault Systèmes that repurposes 3D CAD models into:
- Interactive assembly and disassembly animations
- Exploded views with BOM callouts
- Step-by-step work instructions
- Service, installation, and training manuals
- Marketing and sales visuals
The key advantage? It stays linked to your source CAD. When the engineering team revises the design, Composer can update the illustrations and animations in place rather than forcing you to rebuild from scratch.
The Composer Family
There are three core products:
- SOLIDWORKS Composer — The authoring tool where you create animations, exploded views, and interactive content.
- Composer Sync — A headless batch tool that automatically rebuilds Composer files when source CAD changes (ideal for high-volume SKUs).
- Composer Player Pro — An enhanced viewer for downstream users (shop floor, service techs) who need measuring, cross-section, and markup tools beyond the free Composer Player.
Step-by-Step: Creating an Interactive Assembly Animation
Step 1: Import Your CAD Model
Launch SOLIDWORKS Composer and import your assembly. Composer supports native SOLIDWORKS files (.sldasm, .sldprt) as well as major neutral formats (STEP, IGES, Parasolid, ACIS, and more).
The import creates a lightweight .smg (Composer) file — this is what you’ll work with. The model geometry is preserved, but there’s no feature tree, mates, or parametric history. That keeps the file snappy and easy to manipulate.
Tip: Name your assembly hierarchy clearly before importing — the component tree in Composer mirrors the CAD assembly structure, and well-named parts make the animation workflow much faster.
Step 2: Set Up Your Starting View
Before you begin animating, define a clean starting view:
- Orient the model in a standard position (ISO view is a good default)
- Center it in the viewport
- Set the zoom level so the full assembly is visible
- Save this as a named view (e.g., “_Start Position_”)
Naming conventions matter — clear view names will make the timeline stage cleaner later.
Step 3: Build the Disassembly Sequence with Intermediate Views
This is where the magic happens. You’ll create a series of intermediate views that represent each stage of the disassembly:
- Identify the removal order. Plan which parts come off first (fasteners → covers → sub-assemblies → internal components).
- Translate components. Use the Transform > Translation tool to move parts out of the assembly. Don’t delete or hide them yet — just move them to a clear visual position.
- Capture a view. After each move, save a new named view. For example: “Screws Removed”, “Top Plate Off”, “Battery Exposed”.
- Hide components when needed. For parts that are fully removed, duplicate the last view and change the component’s opacity to 0 (or use the Hide key). Update the view to save this state. This creates a natural “removed” appearance in the animation.
- Continue the sequence. Move, capture, hide — repeat until the assembly is fully disassembled or the target component is exposed.
Step 4: Create an Exploded View (Optional but Recommended)
An exploded view makes a dramatic final frame for the disassembly half of your animation:
- Use box select to grab groups of related components
- Translate them outward to create clear separation
- Use the Linear Explode tool to evenly space components along an axis
- Save as a new view (e.g., “Fully Exploded”)
Step 5: Build the Animation in the Timeline
Now comes the fun part — turning your views into a flowing animation:
- Activate the Animation Timeline (View > Timeline or the timeline dock icon).
- Drag and drop views from the View panel into the timeline. Each view becomes a keyframe. Composer automatically interpolates the movement, rotation, and opacity transitions between views.
- Set timing. Click on each frame in the timeline to adjust its duration. For the initial steps (screw removal, etc.), 1–2 seconds of pause before the next transition gives the viewer time to understand what’s happening.
- Add the reassembly. Here’s a powerful Composer trick — copy the frames from steps 2 through 7 (the disassembly), paste them after the exploded view, and then reverse their order in the timeline. Now you get the entire reassembly sequence without recreating any views.
- Preview. Hit Play in the timeline to watch the full animation. Check that hide/show transitions, opacity fades, and part movements look smooth. Tweak durations as needed.
Step 6: Add Interactivity (The “Interactive” Part)
A video is great, but the real power of Composer is interactivity. When you publish to HTML5 or 3D PDF, the end user can:
- Rotate, pan, and zoom at any point in the animation
- Step through the sequence frame-by-frame using Previous/Next buttons
- Click on components to see part numbers and BOM information
- Toggle section views to see internal details
To enable this, make sure your published output includes the player controls. The standard HTML5 template includes all of these interactions out of the box.
Step 7: Publish Your Output
Composer supports multiple output formats, each suited to a different use case:
| Format | Best For | Interactivity |
|---|---|---|
| HTML5 | Web-based manuals, intranet, help portals | Full 3D interaction, step controls, BOM |
| 3D PDF | Supplier documentation, emailed manuals | Full 3D interaction (Adobe Reader required) |
| MP4 Video | Marketing, social media, training videos | Playback only (no interaction) |
| Images (PNG, JPEG, TIFF) | Print manuals, slide decks | Static (no interaction) |
| SVG (Vector) | Print at any resolution, line-art manuals | Static (no interaction) |
Pro tip: For internal shop-floor use, publish to HTML5 and host on a local intranet server. Technicians can open it on a tablet or phone, zoom into the exact step they need, and rotate the model to match their physical vantage point.
Best Practices for Great Assembly Animations
1. Plan the Sequence Before You Click
Sketch out the disassembly order on paper. Which parts come off first? Which are nested inside others? A good plan saves you from re-capturing views multiple times.
2. Use Consistent View Naming
Name your views with a prefix so they sort logically in the list (e.g., “01_Remove Screws”, “02_Remove Plate”). This makes the timeline drag-and-drop workflow much cleaner.
3. Leverage Opacity for Removed Parts
Instead of hiding parts abruptly, use the opacity transition in Composer. A part that fades out as it moves away looks professional and intuitive — the viewer’s eye follows the movement and understands it’s been removed.
4. Keep Exploded Views Clean
When creating exploded views, maintain logical grouping. Keep fasteners near the parts they secure. Use the Linear Explode tool to space components evenly rather than moving each one manually.
5. Test on the Target Device
If you’re publishing HTML5 for tablet use on the shop floor, test the interaction on an actual tablet. Touch gestures (pinch-zoom, rotate) should feel natural. Adjust button sizes if needed.
6. Keep the Timeline Lean
You don’t need a keyframe for every single bolt. Group fasteners and simple parts into a single step. A 10–15 frame animation is often more effective than a 50-frame one that viewers click through impatiently.
Common Use Cases
- Manufacturing work instructions: Step-by-step assembly guides for production line workers — reduces training time and assembly errors.
- Service and maintenance manuals: Show technicians exactly how to disassemble a machine to access a specific component for repair or replacement.
- Installation guides: Field-installable options and accessories — clear visual steps reduce on-site errors.
- Sales and marketing: Interactive product demos that prospects can explore on their own terms.
- Training material: New employee onboarding — interactive animations are far more engaging than static slides.
Ready to Get Started?
SOLIDWORKS Composer turns your existing 3D CAD investment into a powerful documentation engine. A free 30-day trial is available from the SOLIDWORKS website — download it, import an assembly you know well, and try the steps above. Most users create their first usable animation within an hour.
Need help setting up Composer or choosing the right license tier for your team? Contact our team at CustomizeCAD — we’ll help you get started.