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Learn Fusion360-scripting - 10 Code Examples & CST Typing Practice Test

Fusion 360 Scripting allows users to automate design tasks, create custom tools, and extend functionality within Autodesk Fusion 360 using Python or JavaScript (TypeScript) APIs, enabling parametric modeling, simulation, and manufacturing workflow automation.

View all 10 Fusion360-scripting code examples →
Create New Document (Fusion 360)Create a Sketch on XY PlaneDraw a Line in SketchDraw a Circle in SketchExtrude Sketch ProfileCreate a Rectangle SketchApply Fillet to EdgeMove BodyCreate Circular PatternSave Design Document

Learn FUSION360-SCRIPTING with Real Code Examples

Updated Nov 27, 2025

Explain

Fusion 360 Scripting provides programmatic access to the Fusion 360 API for automating repetitive design and manufacturing tasks.

Supports creating custom add-ins, scripts, and commands for modeling, assemblies, and CAM operations.

Offers direct access to design objects, components, sketches, bodies, and parameters.

Often used with Python (via Fusion 360 API) or JavaScript/TypeScript for web-based Fusion add-ins.

Widely used by engineers, designers, and manufacturers for enhancing CAD/CAM productivity.

Core Features

Manipulate components, bodies, and sketches

Access and modify parameters

Automate CAM toolpaths and simulation

Event handling and command definitions

Error handling, logging, and debugging support

Basic Concepts Overview

Scripts vs Add-ins - Scripts for quick automation, Add-ins for persistent tools

Design objects - components, bodies, sketches, features

Parameters - control dimensions and constraints programmatically

Event handling - react to design or UI changes

API navigation - using Python objects to traverse and modify models

Project Structure

Python script (.py) or JavaScript file

Add-in folder structure with manifest

Supporting libraries

Configuration files or constants

Documentation and usage guide

Building Workflow

Define task to automate (e.g., parametric model, batch export)

Access Fusion 360 API objects

Write Python script or Add-in

Test on sample model

Deploy for repeated use or share with team

Difficulty Use Cases

Beginner: Automate simple sketch or extrusion

Intermediate: Modify component parameters

Advanced: Generate assemblies programmatically

Expert: Automate CAM toolpath generation

Architect: Full parametric design and manufacturing workflow automation

Comparisons

Fusion 360 Scripts vs AutoLISP: Fusion uses Python/JS for modern parametric modeling; AutoLISP is CAD-specific and legacy

Fusion 360 Scripts vs .NET API: Python easier for quick scripts; .NET more robust for advanced Add-ins

Fusion 360 Scripts vs Dynamo: Dynamo is visual; scripting allows text-based parametric control

Fusion 360 Scripts vs API Automation Tools: Scripts offer deep object access; external tools may be limited

Fusion 360 Scripts vs Manual Modeling: Automates repetitive tasks and batch operations, saving time

Versioning Timeline

2013 - Fusion 360 launched with scripting support

2015 - Python API integration introduced

2017 - Add-in framework expanded for JavaScript/TypeScript

2018 - Enhanced CAM API support

2020 - Cloud project and script sharing enabled

2023 - Improved API coverage and debugging

2025 - Latest Fusion 360 API supports modern Python 3 and TypeScript add-ins

Glossary

Script - Python/JS file executed in Fusion 360 for automation

Add-in - Persistent tool with UI integration

Component - Assembly part or subassembly

Parameter - User-defined design variable

Workspace - Fusion 360 environment (Design, CAM, Simulation)

Installation Setup

Install Autodesk Fusion 360

Enable Scripting and Add-ins menu

Set up Python environment (if not embedded)

Load scripts via Scripts and Add-Ins panel

Test scripts with sample models

Environment Setup

Install Fusion 360

Enable Scripts and Add-ins menu

Set up Python 3 environment if needed

Load scripts via panel

Organize Add-ins for persistent commands

Config Files

Python scripts (.py) or JS/TS files

Add-in folder with manifest (package.json / manifest.xml)

Supporting modules or libraries

Configuration constants and templates

Documentation for workflow

Cli Commands

Scripts executed from Scripts and Add-ins panel

Add-ins loaded/unloaded via panel

Print and logging for debugging

Event handling registration

Optional cloud file access via API

Internationalization

Supports Unicode for strings

Works with multi-language Fusion 360 installation

Messages and dialogs can be localized

Handles locale-specific data formats

Integrates with cloud projects in different regions

Accessibility

Commands accessible from Scripts and Add-ins panel

Keyboard shortcuts and toolbar integration

Dialog-based user input

Interactive feedback in design workspace

UI accessible in different workspaces

Ui Styling

Fusion 360 native UI

Add-in commands appear in toolbar or panel

Custom input dialogs via API

Message prompts in Fusion 360 console

Dynamic UI updates for script feedback

State Management

Script variables local to execution

Add-ins maintain persistent state during session

API objects reflect current design state

Events can trigger actions automatically

Cloud project data managed separately

Data Management

Manipulate design objects and parameters

Export data to CSV, JSON, or local files

Access cloud project models and designs

Log operations and track automation results

Manage versioning of scripts and add-ins

Architecture

Fusion 360 application runs embedded Python or JavaScript interpreter

Scripts executed via Add-Ins or Scripts menu

Access Fusion 360 objects via API (Design, CAM, Simulation)

Custom commands communicate with Fusion 360 environment

Optional integration with cloud data or local files

Rendering Model

Scripts executed within Fusion 360 environment

Commands manipulate API objects

Add-ins register UI commands and event handlers

Parameters control geometry programmatically

CAM operations automated via API toolpath objects

Architectural Patterns

Script-based automation

Add-in UI integration

Event-driven command handling

Modular libraries for repeated use

Parameter-driven design automation

Real World Architectures

Parametric product design automation

Automated assembly generation

Batch export and documentation generation

CAM toolpath and simulation automation

Cloud-based design workflow integration

Design Principles

Parametric modeling automation

Direct API access to design and CAM objects

Modular scripting and Add-in architecture

Integration with cloud and local project data

Enhance productivity while maintaining design integrity

Scalability Guide

Organize scripts and Add-ins modularly

Batch process multiple designs or assemblies

Cache object references for efficiency

Automate CAM workflows for multiple setups

Integrate with external data sources for large projects

Migration Guide

Update old scripts for new API versions

Refactor Add-ins for workspace changes

Test scripts on sample designs

Ensure Python 3 compatibility

Deploy updated scripts to team projects

Performance Notes

Minimize repeated API calls inside loops

Use efficient selection sets

Avoid regenerating large models repeatedly

Cache references to objects when possible

Batch process components where possible

Security Notes

Validate external file inputs

Avoid executing untrusted scripts

Protect sensitive design data

Backup projects before automation

Use version control for scripts and add-ins

Monitoring Analytics

Track execution of scripts

Monitor assembly modifications

Validate automated geometry

Log CAM operations and toolpath generation

Audit Add-in usage across team projects

Code Quality

Use modular and reusable functions

Comment scripts and Add-ins

Validate input parameters

Avoid redundant API calls

Organize libraries and dependencies

Practical Examples

Batch generate design variations with parameters

Automatically create sketches and extrusions

Generate assembly constraints programmatically

Export multiple design files automatically

Automate CAM setup and toolpath creation

Troubleshooting

Check API object availability before modification

Verify correct workspace (Design vs CAM)

Debug scripts using Fusion 360 console or print statements

Validate parameter names and units

Use small test models before large assembly automation

Testing Guide

Run scripts on test models

Print debug information in console

Verify geometry changes visually

Check parameters and constraints

Test Add-ins across workspaces (Design, CAM)

Deployment Options

Scripts executed ad-hoc from Scripts panel

Add-ins for persistent UI commands

Shared scripts via cloud project

Distribute Add-ins with full folder structure

Automate startup execution via Add-in manifest

Tools Ecosystem

Fusion 360 Desktop App

Python interpreter embedded

JavaScript/TypeScript API

Add-in and Scripts panel

Cloud data and file integration

Integrations

Fusion 360 native commands

Cloud data hub (Autodesk Drive)

External CSV, JSON, or XML files

CAM operations and simulation API

Custom UI panels and commands

Productivity Tips

Start with small scripts before full Add-ins

Use console logging for debugging

Modularize code for reuse

Test on sample projects first

Combine scripting with cloud project automation

Challenges

Understanding Fusion 360 API object hierarchy

Debugging complex scripts

Managing dependencies and libraries

Automating large assemblies efficiently

Ensuring cross-version compatibility

Learning Path

Learn Fusion 360 basics (Modeling, Assemblies, CAM)

Understand Python or JavaScript basics

Explore Fusion 360 API documentation

Create simple scripts for modeling

Develop Add-ins for advanced workflows

Skill Improvement Plan

Week 1: Python/JS fundamentals and simple scripts

Week 2: Manipulating sketches and bodies

Week 3: Automate parametric features

Week 4: Assembly operations and constraints

Week 5: CAM automation and Add-in development

Interview Questions

What is Fusion 360 Scripting and how does it differ from manual modeling?

How do you create an Add-in in Fusion 360?

Explain the difference between scripts and Add-ins.

How do you manipulate components programmatically?

Give an example of CAM automation using scripting.

Cheat Sheet

app = adsk.core.Application.get() -> Get Fusion 360 app

design = app.activeProduct -> Access current design

component.bRepBodies -> Access bodies in component

param = design.userParameters.add(...) -> Create parameter

cmdDef = ui.commandDefinitions.addButtonDefinition(...) -> Create command

Books

Mastering Fusion 360 Scripting

Fusion 360 API for Designers

Python for Fusion 360 Automation

Advanced Fusion 360 Add-ins

Parametric Design Automation with Fusion 360

Tutorials

Fusion 360 Python API beginner guide

Creating Add-ins in Fusion 360

Automating sketches and assemblies

CAM toolpath automation using scripts

Advanced parametric design scripting

Official Docs

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-API

https://www.autodesk.com/developer-network/platform-technologies/fusion-360-api

Community Links

Autodesk Fusion 360 Forums

Fusion 360 API GitHub repositories

YouTube Fusion 360 scripting tutorials

LinkedIn Fusion 360 developer groups

StackOverflow Fusion 360 tag

Community Support

Autodesk Fusion 360 Forums

Fusion 360 API GitHub repositories

YouTube Fusion 360 scripting tutorials

LinkedIn Fusion 360 scripting groups

StackOverflow Fusion 360 tag

Monetization

Custom Fusion 360 Add-in development

Workflow automation consulting

Parametric design toolkits

CAM automation services

Integration of CAD/CAM data pipelines

Future Roadmap

Full Python 3 API support and enhancements

Expanded TypeScript Add-in capabilities

Better debugging tools in Fusion 360

Improved cloud project and collaboration integration

Support for more CAM and generative design automation

When Not To Use

When Fusion 360 is unavailable

For simple manual modeling tasks

If scripting skills are lacking and no learning time is available

When real-time performance is critical for simulation

For non-Autodesk CAD platforms

Final Summary

Fusion 360 Scripting automates modeling, assembly, and CAM workflows using Python or JavaScript.

Enables parametric design generation, batch operations, and custom Add-ins.

Provides access to Fusion 360 API for objects, parameters, and simulation.

Ideal for engineers, designers, and manufacturers automating repetitive tasks.

Combines scripting flexibility with Fusion 360’s parametric and CAM capabilities.

Faq

Can Fusion 360 scripts run outside Fusion? -> No, Fusion 360 must be running.

Do I need programming knowledge? -> Yes, basic Python or JavaScript skills help.

Can scripts modify assemblies? -> Yes, via API objects.

Are Add-ins different from scripts? -> Add-ins are persistent and can add UI commands.

Is Fusion 360 scripting supported in cloud? -> Yes, scripts can access cloud project data.

Code Sample Descriptions

1

Create New Document (Fusion 360)

import adsk.core, adsk.fusion, adsk.cam, traceback
app = adsk.core.Application.get()
design = app.documents.add(adsk.core.DocumentTypes.FusionDesignDocumentType)

Opens a new Fusion 360 design document via API.

Let’s Try →
2

Create a Sketch on XY Plane

rootComp = design.rootComponent
xyPlane = rootComp.xYConstructionPlane
sketch = rootComp.sketches.add(xyPlane)

Adds a new sketch on the XY plane.

Let’s Try →
3

Draw a Line in Sketch

lines = sketch.sketchCurves.sketchLines
line = lines.addByTwoPoints(adsk.core.Point3D.create(0,0,0), adsk.core.Point3D.create(5,0,0))

Draws a line in the active sketch between two points.

Let’s Try →
4

Draw a Circle in Sketch

circles = sketch.sketchCurves.sketchCircles
circle = circles.addByCenterRadius(adsk.core.Point3D.create(0,0,0), 5)

Creates a circle in a sketch by specifying center and radius.

Let’s Try →
5

Extrude Sketch Profile

prof = sketch.profiles.item(0)
extrudes = rootComp.features.extrudeFeatures
extInput = extrudes.createInput(prof, adsk.fusion.FeatureOperations.NewBodyFeatureOperation)
extInput.setDistanceExtent(adsk.core.ValueInput.createByReal(10), adsk.fusion.ExtentDirections.PositiveExtentDirection)
extrudes.add(extInput)

Extrudes a sketch profile to create a 3D solid.

Let’s Try →
6

Create a Rectangle Sketch

lines = sketch.sketchCurves.sketchLines
l1 = lines.addByTwoPoints(adsk.core.Point3D.create(0,0,0), adsk.core.Point3D.create(5,0,0))
l2 = lines.addByTwoPoints(adsk.core.Point3D.create(5,0,0), adsk.core.Point3D.create(5,3,0))
l3 = lines.addByTwoPoints(adsk.core.Point3D.create(5,3,0), adsk.core.Point3D.create(0,3,0))
l4 = lines.addByTwoPoints(adsk.core.Point3D.create(0,3,0), adsk.core.Point3D.create(0,0,0))

Draws a rectangle using four sketch lines.

Let’s Try →
7

Apply Fillet to Edge

edges = rootComp.bRepBodies.item(0).edges
fillets = rootComp.features.filletFeatures
filletInput = fillets.createInput()
filletInput.addConstantRadiusEdgeSet(adsk.core.ObjectCollection.create(edges), adsk.core.ValueInput.createByReal(2), True)
fillets.add(filletInput)

Applies a fillet to a selected edge of a body.

Let’s Try →
8

Move Body

body = rootComp.bRepBodies.item(0)
matrix = adsk.core.Matrix3D.create()
matrix.translation = adsk.core.Vector3D.create(10, 5, 0)
moveFeats = rootComp.features.moveFeatures
moveInput = moveFeats.createInput(adsk.core.ObjectCollection.create([body]), matrix)
moveFeats.add(moveInput)

Translates a body along X, Y, Z axes.

Let’s Try →
9

Create Circular Pattern

axis = rootComp.zConstructionAxis
features = rootComp.features
feat = features.item(0)
patternFeats = rootComp.features.circularPatternFeatures
patternInput = patternFeats.createInput(adsk.core.ObjectCollection.create([feat]), axis, 6, adsk.core.ValueInput.createByString('360 deg'))
patternFeats.add(patternInput)

Creates a circular pattern of a feature around an axis.

Let’s Try →
10

Save Design Document

design.saveAs('C:/Users/Public/Documents/Fusion360/part1.f3d', '')

Saves the current design document to a file.

Let’s Try →

Frequently Asked Questions about Fusion360-scripting

What is Fusion360-scripting?

Fusion 360 Scripting allows users to automate design tasks, create custom tools, and extend functionality within Autodesk Fusion 360 using Python or JavaScript (TypeScript) APIs, enabling parametric modeling, simulation, and manufacturing workflow automation.

What are the primary use cases for Fusion360-scripting?

Automating repetitive modeling tasks. Custom parametric design generation. Batch exporting or processing designs. Automating CAM toolpath generation. Creating custom UI commands and add-ins

What are the strengths of Fusion360-scripting?

Rapid automation of repetitive CAD/CAM tasks. Highly flexible with Python scripting. Direct access to Fusion 360 API objects. Supports parametric design automation. Integrates seamlessly with Fusion 360 workflows

What are the limitations of Fusion360-scripting?

Only works within Fusion 360 environment. Python API may have limitations compared to full desktop APIs. Performance can be slower for extremely large assemblies. UI customization is limited to Fusion 360 add-in framework. Requires knowledge of Fusion 360 object model and API

How can I practice Fusion360-scripting typing speed?

CodeSpeedTest offers 10+ real Fusion360-scripting code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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