3D Adaptive Stock to Leave being ignored

[tylerjohnbates]

Having problems with 3D adaptive tool paths insisting on leaving a sliver of axial stock 

Stock to leave is completely turned off

Flat area detection is turned off

Under 'Stock Definition' the ignore stock less than is set to 0in

I've included screenshots as well in the attachments

Solutions?

I've come across some forms saying the minimum cutting radius is sometimes an issue??

This becomes a big issue when I want to use 'Continue Rest Machining' as even with 'reduce air cutting' turned on Fusion360 insists that it would rather machine the whole part again 

[programming2C78B]

you mean "under" the tool?
Just drop your bottom height...

If you look at your toolpath the bottom is probably some very small positive value instead of 0 or negative. 

[tylerjohnbates]

Unfortunately the bottom height is set to 0in. This issue occurs with either "stock bottom" or "model bottom"

I can set the Bottom Height to be a negative value (say -0.01 inches) but then the machine goes into our spoil board.

Not the end of the world but annoying to resurface because suction to the next part is lost otherwise.

[tylerjohnbates · Accepted solution]

So the sliver of axial stock does go away with a negative bottom height offset of -0.0002 in. This is the minimum to get the issue to disappear. 

So I guess this works??

Just seems like a 'work around' to the real issue

[programming2C78B · Accepted solution]

Adaptive has a built in thing where it always leaves some axial stock. I agree it shouldn't be that way, but it has been for years.

I'll program for Z-.6 and then look at it's -.59997 or something annoyingly far off. If you're doing adaptive on a board like this, just do whatever -stock to make it actually cut at 0.0.

[tylerjohnbates]

Weird, but comforting to know it's just an issue in general for some people. 

[matty.fuller]

Try turning Flat Area Detection on and see what happens, without it you're only able to work in multiples of your max/fine stepdown which could cause issues like this.