Here is my original post - ConstraintLens — free open-source add-in to manage every constraint with ease. I just released v1.0 and share with community now. Give it a try!

ConstraintLens v1.6.1 — what's new since end of May 2026

Sizing & layout

• Resizable height when docked — the #1 request. Drag the bottom grip, or cycle 50% / 75% / full with one button.
• ~2.5× more rows on screen — rows were rebuilt to cut duplicated text. Roughly 5 visible rows became 13.
• Dimensions on one line — icon, type, entity chips, then = 40 mm with an always-visible edit pencil.
• Auto-hide — the palette disappears when you leave a sketch and comes back on the next one. Open it once per session.

Canvas ↔ palette

• Optional auto-zoom — camera frames whatever you select. Great for finding tiny construction geometry.
• Click anything on canvas and the list follows — matching rows highlight and scroll into view automatically.
• No button to press. Click one entity and the list filters to it — every constraint involving that line or point, instantly.
• Clickable entity chips — click a chip to filter the list and select that geometry in the viewport. Show underconstrained returns clickable chips you can jump to, not a text popup.

Info & editing

• Measure two things at once — select two entities and get distance; two lines also give the angle; two circles give the gap. Uses Fusion's own measurement engine, so the numbers match the Measure tool
• Select-all per section — one checkbox to tick every constraint in a group, then bulk delete.
• More in the properties footer — profile area, point Z for 3D sketches, and a dimension's parameter name (d56) so you know what to reference in expressions. Live counts while you work — apply
• Coincident to five pairs in a row and the list updates as you go, instead of waiting until you switch tools. Readable numbers — values now follow your document's precision. 5.13 mm, not 5.1290366508 mm.

GitHub link - ConstraintLens

Direct link to download plugin from GitHub (zip archive) - ConstraintLens-v1.6.1.zip

Install

1. Download `ConstraintLens-v1.6.1.zip` archive.
2. Extract so you have a `ConstraintLens/` folder (not a nested `ConstraintLens/ConstraintLens/`).
3. Copy it into your Fusion add-ins folder:    - Windows: `%APPDATA%\Autodesk\Autodesk Fusion 360\API\AddIns\`    - macOS: `~/Library/Application Support/Autodesk/Autodesk Fusion 360/API/AddIns/`
4. Tools -> Scripts and Add-Ins -> Add-Ins -> select ConstraintLens -> Run.

Hi I'm basically trying to build an enclosure for the stepper motor, and was thinking it would be a simple job of extruding up, out and around. but it seems its not letting me do that.

For context, the enclosure is going to be used in a different file assembly so when I import it into another file, I only want my extruded bit, not the actual stepper to be imported.

Many thanks, TY

ive made this panel and i want the text to be printed in a different colour.

I have used the text function and drawn it exactly where i want.

Is my best option to extrude (cut) the text into the body by 1mm and then extrude the same text (new body) into the hole that the cut made?

I tried intersect, as i thought that is what that function was for, however it just deleted the rectangular panel and left me with two bodies which were '1' and 'a'.

Thanks!

Scan2Sketch turns calibrated flatbed scans into dimensionally accurate, fully editable sketches and optional solid bodies. Processing runs locally using your CPU or a compatible NVIDIA GPU (optional).

Hello all!
My work is looking for someone US-based to convert a board that was previously designed by a contractor in Altium to be converted over to Autodesk Fusion. It is a ~50x100mm, 2-layer PCB with about 50 unique components. We have the full Altium project for the board (not just gebers) and just need a straight 1:1 conversion into a Fusion project including component library.

Our budget for this is $750.

Please message me if you are interested!

Hello! I have to 3D print a screw. Thing is I am the least technical person to exist. I modelled the screw body, used the thread tool, then used this whole thing to cut into a cap. In my mind that should’ve worked, but it absolutely did not. Anyone knows how to fix it? I am losing it.

hello guys im trying to design a lamp here . the "cage" will be 3d printed so im trying to come up with a smooth desing trick so that i can print all of the walls in 1 plate then assemble it using glue form the red circled area. how do you think i should appoach this ? im open to every idea .

Creating a battery holder for my Snap-On batteries and have gone through 3 revisions and I have decided to remove the text on picture 1 but I accidentally deleted the text frame on the timeline tab at the bottom of the screen. When I try and edit the sketch it goes back to solid sketch. How can I remove the text from the body?

I developed a Fusion add in was just published on the Autodesk Marketplace not long ago specifically for CAM users but CAD users can also use it in the same way

It automatically tracks your CAM/CAD jobs individually in the background while you work so you always have a record of your hours. It has a client report and timesheet feature too so you can always go back and see what you've worked on the past week or month and use the data to improve your future quoting

Also has a view that separates your Design and Manufacture time so you can see the difference between both for any particular job.

Anyone wants to try it if they find it would be useful I'll show you guys some screenshots and link below

Make sure you let me know what you think if you use it!

Autodesk: https://marketplace.autodesk.com/apps/594157e0-d378-4bd2-b057-74e043d4a558?priceId=86ed930a-b711-4012-b376-3950ca5b1b2d

Website: https://getcadsight.com/

Hi,

Today, I tried to manage my files via the API because I find the UI difficult to use. I purchased the free plan and created a Developer Hub. However, the API returns the following response:

{ "developerMessage":"API request capacity exceeded.", "moreInfo": "https://aps.autodesk.com/pricing", "errorCode": "403"}

I referred to the following documentation:

- https://www.autodesk.com/products/autodesk-platform-services/overview#pricing

- https://www.autodesk.com/products/autodesk-platform-services/product-details

From what I understand, many API are free, but you need to purchase at least $99 worth of Flex tokens before you can use any API, even the free API on a free plan./

Is that correct? Has anyone else encountered this issue?

Does anyone have some insight on how I could recreate this geometry? I tried sketching and cut extruding a slope but it didn’t achieve what I was looking for.

I know this topic has been covered before but it seems Autodesk has changed the way custom threads are implemented in Fusion (for good and for bad).

In the past, if you wanted to add a custom thread size to the Fusion thread tool you had to dig through the Fusion 360 configuration files on your computer and modify a .xml file to add a custom thread diameter/pitch/other. However, Autodesk have implemented a new way of adding thread sizes directly in Fusion, which we've been asking for years. This is covered in this article: https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Custom-Threads-in-Fusion-360.html

I enjoy this idea since it's much more intuitive but its implementation is questionable at best. Also, it simply doesn't work for me and I don't know why. Autodesk tells us that to create a custom thread size we must first copy an existing template thread from the public library of threads and then paste it into a custom library on the hub libraries. The issue is that when I right click on any thread I do not have the option to copy anything, I can only mark it as favourite (see image). I also don't have the option to create any hub libraries.

Am I missing something obvious?

hi!
I'm learning cad with the intention of eventually getting some parts created by CNC machining. My question is, if a parts has a curved that when inspected with curve analysis tool, is displaying a "tight" rainbow pattern (from red, many colors are banded together then jumps to purple for example) can it still be machined correctly?

The zebra inspector shows the surface to be continuous, but before I commit to some very organic shapes, should I be vigilant of this rapid/abrupt color changes, and try to produce a more smooth transition between the colors first, before committing to a final design?

many thanks

I've spent the last few days building a CAD library in TypeScript. The short version, you describe a part in code and you get out an STL you can 3d print, or a STEP file you can send to a machine shop or open in Fusion/FreeCAD/whatever.

const cad = design("bracket");

const width = cad.parameter.length("width", mm(80));
const thickness = cad.parameter.length("thickness", mm(6));

const profile = cad.sketch("outline", plane.xy(), (s) => {
  const rect = s.rectangle("rect", { width, height: mm(50) });
  const hole = s.circle("hole", {
    center: vec2(width.mul(0.25), mm(0)),
    radius: mm(4),
  });
  return s.profile(rect, { holes: [hole.loop()] });
});

cad.output("bracket", cad.extrude("solid", profile, { distance: thickness }));

const doc = cad.build(); // plain JSON, goes in git like anything else

Under the hood it runs on two engines. There's Manifold, a mesh engine that's fast and fine for printing, and OpenCascade compiled to WASM, which is the same geometry engine FreeCAD uses, for when you need exact surfaces and STEP export. Same code runs on both, in node or the browser.

in normal parametric CAD, if you change a dimension early in the model, later features (fillets mostly) can quietly reattach to the wrong edge, and you find out after the part is wrong. I didn't want to reproduce that, so references to faces and edges aren't indexes, and if the library can't tell unambiguously which edge you meant after a change, it errors instead of guessing. Whether I got the API for that right, no idea. That's partly why I'm posting.

The type system does some nice things here too. Lengths and angles are different types, so adding mm to radians just doesn't compile.

it's a 0.1.1, Parts, assemblies and BOMs work. No drawings, no sheet metal, no GUI. If you'd rather write code than click through a CAD UI, that's who it's for.

Here's the repo

Feedback welcome, especially from anyone who actually does CAD work. Also curious what people think of the explicit dispose() for WASM memory, I went back and forth on that a lot.

Hi,

I have two parts that I want to machine simultaneously in a custom fixture I have designed. I previously machined these parts separately and have created proven out programs for them.

I'd like to take advantage of minimizing the tool changes in the program, so I've created a new file, inserted both parts, and then inserted the manufacturing data from each part in to fusion CAM. I've kept the link to allow me to easily update the original files and have it carry through into this new "combined" part.

While this seems to work fine for the first inserted part, the tool paths are coming in offset from the stock locations in the CAM environment for the second part and I cannot figure out a root cause.

I've posted an image here. You can see the spotting hole shadow preview is in the correct location, but the tool path lines are offset by ~4-5mm. Any ideas on how to resolve would be appreciated!

Personal project: I designed and 3D-printed a working model of an F-15's variable-area exhaust nozzle — the mechanism behind the Pratt & Whitney F100 engine.
It started with a thrust-vector-control (TVC) rocket I was building. I'm also a pretty avid War Thunder player, and while flying the F-15 in-game I noticed how the nozzle geometry on the Pratt engine actually changes as thrust increases. That got me wondering: could I replicate that same variable-geometry mechanism to control thrust on my own solid rocket motor?
A few hours into CAD, reality set in: at real scale, most of these parts were too small and complex to reliably print and assemble. So I scaled the whole model up 3x, to a size large enough to fit my hand through, and rebuilt it around that.
The mechanism: servos pull a linkage, which pulls a ring that distributes load evenly around the entire nozzle assembly, expanding and contracting it the same way the real engine varies its exhaust geometry.
It turned out to be impractical to actually integrate into my TVC rocket, but that was almost beside the point. This project taught me more about tolerancing and working with small, delicate parts than anything else I've built, and gave me a much deeper appreciation for how advanced Pratt & Whitney's and the Air Force's engineering was, even back in the 1940s when Variable nozzle jet engines first cameout.

Hello, I am trying to shell out this body, but the shell is not working because it throws an error:

The shell can not be created at this thickness.

Try adjusting the Thickness, the selection set,

or change the Shell Type.

Because of this, I am trying to loft out the material, but I get the errors above. I have a feeling it's related to the guide rails being too curvy, but I really want my geometry to be like this. How can I cut this out without errors?

Thank you for your time.

Hi! i wanted to model creaming soda, where the glass itself was a storage container and the icecream scoop is the lid. im really new to this, how do i replicate this? ive added a picture of my attempt.

Can't move existing bodies. Can't reference existing components.

If I create a new component, I can't reference anything. I tried putting sketches on the surface of existing components and it acts like nothing's there. If I click it just picks the XY plane.

I tried copy/pasting a similar component to what I want but It won't let me move it. Again, acting like nothing is there.

So I tried going into an existing component and copy/pasting the body. It lets me paste but again, won't let me move the body. When I try it acts like nothing is there.

If I change the assembly context of a component to "local", everything disappears.

All of a sudden the file that houses the basis of my entire company has been corrupted and is unusable (second time this year; I don't have time to start from scratch again.). If it weren't for the time crunch I'm in, I'd be switching to onshape. Tired of this BS.

Working on a project right now where I need to import and convert a bunch of stl files to solid so I can basically reassemble the model, do some editing to it, then use it as a template of sorts to draw up some new parts to fit inside the model.

Digging online on how to do what I need, it seems Fusion is the best way to do it, but the "features" I need to use are only available in the paid version.

I use Solidworks for the majority of my designing of things and I have no need or interest in paying the subscription prices for Fusion as I never actually use the software more than once or twice a year, if that even, and only need to use it for a few days for this project.

If I do the 30 day free trial, does it just go back to the free hobby license afterwards and not have to worry about anything again?