topic Re: Drawing dimensions are wrong! in Fusion Design, Validate & Document Forum

Drawing dimensions are wrong!

Beyondforce — Mon, 21 Aug 2023 10:03:39 GMT

Hey Guys,

I'm not sure what's going on, but every drawing I do, it gives me the wrong dimensions!

I did a test with a 50mmx50mmx50mm square, and in the drawing the measurements are very wrong:

Re: Drawing dimensions are wrong!

ClintBrown3D — Mon, 21 Aug 2023 10:19:07 GMT

You are looking to dimension an isometric view. We do not support isometric dimensions yet, this is on our public roadmap.

The dimensions that you are seeing are "Projected" dimensions. We actually block the creation of dimensions on Isometric views using the smart dimensions tool (see below).

I'd love to hear from you directly, and to get your thoughts around how you would like to use dimensions and isometric views. If you're up for it, here is a link to my calendar, please book a 30-minute session with me, and we can chat on Zoom (Note that times are in 24:00 format so 03:00 is 3am, 15:00 is 3pm). Or if a good old-fashioned email is more your style, feel free to ping me Clint. Brown {a} Autodesk.com

Re: Drawing dimensions are wrong!

MRWakefield — Mon, 21 Aug 2023 10:32:58 GMT

You won't get 'real' dimensions from an isometric projection. To demonstrate what's going on I've created a simple model of your 50x50x50mm cube and projected the body to a plane representing what would be the paper's surface. You'll see that the projected side length matches the 40.82mm dimension on the drawing. I've also attached the file to help clarify.

Hope this helps.

Re: Drawing dimensions are wrong!

TheCADWhisperer — Mon, 21 Aug 2023 10:54:56 GMT

@MRWakefield

@Beyondforce

In Autodesk Inventor Professional you can opt for either the True dimension or Projected dimension.

I used True dimension with Isometric all of the time when I was creating educational instruction material.

Re: Drawing dimensions are wrong!

Beyondforce — Mon, 21 Aug 2023 10:57:31 GMT

Dear @ClintBrown3D

I did not know about this limitation.

My manufacture contacted me this morning and wanted to confirm the measurements of one of the prototypes, because he could see that it came out too small.

I wish it wasn't possible to do an isometric measurement at all, that would have saved us a lot of time.

I like to send an isometric view with measurement, because it helps with giving a context to a new product you want to manufacture, without sending all the other views.

Luckily, it happened only to the accessory box and not to the actual product (it would have cost me a lot of $$$).

I sent them the correct measurements, and I think it will be ok.

I guess learning the hard way is the best, as long it's not too expensive 😉

Cheers / Ben.

Re: Drawing dimensions are wrong!

Beyondforce — Mon, 21 Aug 2023 11:48:39 GMT

Hey @TheCADWhisperer,
Unfortunately, I don't work with Inventor anymore.
Now, I don't understand why is it even possible to create dimensions on isometric view if the measurements are not True!?
It's not a big deal, but it's just odd.

Cheers / Ben.

Re: Drawing dimensions are wrong!

Warmingup1953 — Mon, 21 Aug 2023 16:33:00 GMT

I have no idea how you managed to invoke Dimensions for that projection. It's not possible is it in the Drawing Environment? ...Is it?...and if it were would XY & Z be equal (and wrong equally?)