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What threadmill? You have been able to do it for a couple decades...
Reduce your number of teeth...though I would suggest using multiple stepovers instead...
Sample file - Bottom to Top and the same tool Top to bottom
THREADMILL SAMPLE.mcam
You're going to hate the answer but here it is....
After you scale it up and are certain you've made a good clean surface, you scale it back down and stop worrying about how it looks...the math behind the surface is correct. It will cut properly. That chord tolerance is simply how it is visualized.
Let's recount...
You have, by your own admission, your first programming job...
You say it's 100% a bug
and you provide an .ecam file that the vast majority of people cannot open..
I suspect it's not a bug but a usage & definition, setting issue of course though, can't tell because you provided a file that industrial users can't open.
Maybe next time before declaring a bug or something, you provide a file that others can easily open and query...that would go a long way to getting you the help you are asking for,,,,
Sorry if this all comes off as a bit harsh but at least help us help you.
Sure...
Pickup phone, call reseller...hello, I would like to buy a post with these options and I'll send some sample code...
That edit is no easy lift.
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