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

[aj4g]

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.

[davebYYPCU]

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...

[aj4g]

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

[davebYYPCU]

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….

[aj4g]

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

[TrippyLighting]

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@aj4g wrote:

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

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

[davebYYPCU]

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...

[aj4g]

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

[davebYYPCU]

Quicker to reverse engineer it.

Might help...

[hfcandrew · Accepted solution]

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

[aj4g]

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