topic Re: ACME Threads in Fusion Design, Validate & Document Forum

ACME Threads

sunderlandjoe — Thu, 30 Sep 2021 13:01:14 GMT

I am truly blown away at the missteps in the creation of this software. How can a company make inventor and then totally make a mess of Fusion.

Acme threads got added to the thread wizard, I thought great I can finally do Acme. Today I went to make one and just noticed they only added a small table of very specific ones? What the hell was the thought process there.

Acme comes in an virtually unlimited amount of sizes and variations. Since 1854 we've been using the standard formulae for acme and stub acme threads. The standard drop down is fine, but someone needs to add the calculator into fusion.

Enter in the basic major diameter, the pitch, and the tolerance and voila it can create any acme because the formulae for acme/stacme is a standard.

So then I'm like fine, I can't use the thread wizard I'll just draw it. But of course, we actually can't do that either because the software still cannot cut a helix of a custom geometry.

Am I the idiot or is this basic functionality comically still not here?

Re: ACME Threads

piotr.kornafel — Thu, 30 Sep 2021 14:09:34 GMT

Hello @sunderlandjoe

I totally understand your poin.

Our developers still implement new features to Fusion 360 and working on update an existing one.

As far as I know, for now, the only solution to generate helix shape is this add-in here:

Equation Driven Curve

Re: ACME Threads

HughesTooling — Thu, 30 Sep 2021 14:58:48 GMT

Another workaround is to created a twist in a swept surface the use its edge as a path, this will be more accurate than a sketch curve.

Then create a plane along path for the thread section shape and sweep with guide rail. See attached file. If you add parameters you could create a component you can reuse quite easily.