3D adaptive toolpath calculation stuck after certain percentage

[B.J.Michielsen]

I'm milling an aluminium part on a Nomad 3, so I'm making lots of passes at a very shallow DOC. We're talking about 3 to 5 hours of machining for this one toolpath. However, calculation time is either absolutely ridiculous or broken on both my i7 11800H-powered laptop and my ryzen 5600x-based desktop. I've managed to generate the toolpath earlier, when I was experimenting with different speeds and feeds and generated it as 3 separate toolpaths for different heights. Generation took about 20 seconds for each path, so you'd expect about a minute of calculation time on the entire thing in one go. However, 30 minutes in and still stuck around 59%. Here's my settings, can anyone spot what might be wrong? 

I've also tried without flat area detection and with "reduce air cutting" disabled; no difference.

[seth.madore]

Please share your file here (I don't know what a .jfif file is and I'm not adventuresome enough to open it to find out)

File > Export > Save to local folder, return to thread and attach the .f3d/.f3z file in your reply

[B.J.Michielsen]

oh, my bad. It's some variant of .jpg that whatsapp uses for some reason.

[B.J.Michielsen]

Here's the screenshot I was trying to upload.

[seth.madore · Accepted solution]

Without seeing your file, I'm betting it's the .012mm "fine stepdown". That's insanely small, and I bet Fusion is choking at that

[B.J.Michielsen]

Yep, that was it! Not sure why it wasn't applying that fine stepdown when the toolpath was divided up in three parts, but for some reason it was applying that fine stepdown to pretty much the entire toolpath. It also didn't like the 0.1 micron minimum stepdown on the flat area detection. Thank you!