Circular facing op with non-round part?

[bigeddymachineshop]

I'm machining a semi-rectangular part, with a hole in the center, from 12" round stock.

I'd like to face it with a spiral pattern from the outside in.

I tried creating a sketch the same size as the stock to create a boundary, but the cutter stays inside this boundary, even with tool outside boundary set.

I've tried 2d adaptive, spiral, and morphed spiral to no avail.

Are there any videos/simulations out there showing how to get a spiral facing op?

Thank you!

[seth.madore]

Would you be able to share your Fusion file here?
File > Export > Save to local folder, return to thread and attach the .f3d/.f3z file in your reply.

[programming2C78B]

2D contour around your hole 

I use 3D flat, it does a nicer job. 

[bigeddymachineshop]

Your second photo is exactly what I'm trying to do. 

What the heck settings do I use to get it to start from the outside, of my round stock, and continue to the center like yours does??

Edit: Hopefully this photo works.

Double edit: Thank you both for the replies!

[bigeddymachineshop]

Here is the F3D of the part.

I was hoping there was a spiral facing option under the face op!

[programming2C78B · Accepted solution]

Click patch, click your circle, then select that surface in your toolpath. 

If you modelled your stock, you can also just select that. 

[bigeddymachineshop]

GAHH. Turning the raw stock sketch into a patch solved everything.
That's a fantastic tip that will be helpful everywhere.

Thank you so much!