topic Re: Enlarge center polygon hole in a gear without making anything else bigger in Fusion Design, Validate & Document Forum

Enlarge center polygon hole in a gear without making anything else bigger

aj4g — Thu, 26 Jun 2025 03:40:07 GMT

I am working on a filament winder and I would like to enlarge the center hex or polygon hole in the gear without enlarging anything else on the gear.

Re: Enlarge center polygon hole in a gear without making anything else bigger

davebYYPCU — Thu, 26 Jun 2025 11:04:53 GMT

From Mesh environment (What should happen)

Create > Mesh section sketch, to find the original hexagon.

Create > Fit curves to Mesh section, trace the hexagon.

Sketch > Modify > Offset, the profile, by the amount you want it bigger.

Solid > Create > Extrude a new Body for the new hexagon.

Mesh > Create > Tesselate (Converts the new body to Mesh)

Mesh > Modify > Combine - Cut the new body from Original Body.

(My computer freezes about now - and eventually errors out)

Might help...

Re: Enlarge center polygon hole in a gear without making anything else bigger

aj4g — Fri, 27 Jun 2025 01:16:18 GMT

I have tried what you said, but I'm just not familuar with this enough to do it.

Is there anyway you can fix it for me? I need the hex to be 12mm from each vertical side

Re: Enlarge center polygon hole in a gear without making anything else bigger

davebYYPCU — Fri, 27 Jun 2025 02:11:09 GMT

Dimension both vertical legs at 12mm, because it is a polygon, the size will update.

I am away from Fusion for 4 days, will have to wait for assistance from others if it still doesn’t work out.

Might help….

Re: Enlarge center polygon hole in a gear without making anything else bigger

aj4g — Fri, 27 Jun 2025 02:45:22 GMT

I am in no hurry, I will wait for you to help me.

Re: Enlarge center polygon hole in a gear without making anything else bigger

TrippyLighting — Fri, 27 Jun 2025 10:50:32 GMT

@aj4g wrote:

I have tried what you said, but I'm just not familiar with this enough to do it.

That's why Autodesk created free tutorial courses accessible right from within Fusion:

Re: Enlarge center polygon hole in a gear without making anything else bigger

davebYYPCU — Tue, 01 Jul 2025 07:14:09 GMT

I am unable to make this happen with Fusion, and I am not a Meshmixer user, should be an easy job for both software packages

Maybe @hfcandrew can assist why Fusion fails and how to get it done in Meshmixer.

Might help...

Re: Enlarge center polygon hole in a gear without making anything else bigger

hfcandrew — Wed, 02 Jul 2025 03:26:46 GMT

(view in My Videos)

Re: Enlarge center polygon hole in a gear without making anything else bigger

aj4g — Wed, 02 Jul 2025 03:41:09 GMT

What if you fill the 5 holes around the gear, then you would have enough space, just a thought, as I am no CAD person, that's why I can't do this.

Ralph / aj4g

Re: Enlarge center polygon hole in a gear without making anything else bigger

davebYYPCU — Wed, 02 Jul 2025 05:00:36 GMT

Quicker to reverse engineer it.

Might help...

Re: Enlarge center polygon hole in a gear without making anything else bigger

hfcandrew — Wed, 02 Jul 2025 14:45:44 GMT

Sure here's is a freebie, see attached and video just incase.

(view in My Videos)

Re: Enlarge center polygon hole in a gear without making anything else bigger

aj4g — Thu, 03 Jul 2025 19:55:56 GMT

I want to thank you very much for helping me with this gear. I could have never done what you did to get this work work.

You are a cad expert.

It works gread.

Ralph