3D Adaptive Not Ignoring What It Should, I Think

[redmond.limited]

Hello,

I suspect that this is a very silly question with a very simple answer but I have tried lots of things and not been able to get 3D adaptive to do what I want it to do.

I am trying to set up the toolpaths for a turner's cube (just for the sake of a bit of practice) and, on my first op, the 3D adaptive I get the toolpath shown in the first picture below.  The bits outlined by red ellipses seem, to me, to be unnecessary: I feel that the tool should just, really spiral down into the stock and then follow a circular path.  I don't know why those extra outlined bits of the toolpath are there, other than, maybe, it is looking at the "holes" in the underlying geometry (see second picture below).

I've tried various things to sort this out (machining boundary with the tool inside, outside and on centre on the boundary and with various additional offsets; putting in patch surfaces to cover up the "holes" in the underlying geometry) but none of them seem to work.  The only thing that seems to work is taking the radial stock to leave up to 0.5mm.

Can anybody offer any help or advice, please, that would allow me to have the stock to leave at only 0.3mm or 0.2mm without having this issue?

As ever, any comments, at all, would be much appreciated.

Thanks,

Clem.

redmondlimited_0-1703804148002.png

redmondlimited_1-1703804174147.png

[programming2C78B]

Setting your Minimum Stepdown Value to that of the depth of that top counterbore will remove these. Do you have Flat Area Detection on as well? 

[redmond.limited]

Thanks for that.  I have tried that and it is better but I still get the little squiggles at the bottom of the lower counterbore:

redmondlimited_0-1703934861290.png

I feel like there is something very obvious that I'm not doing that I should be doing.

Thanks, again, for your advice.

[programming2C78B]

to get rid of those, simply increase your Minimum cutting Radius until they go away, but remember in reality you're going to be saving like 3 seconds by removing them. In this case, using 2D pocket with the same stepover and feed will make for a "cleaner" roughing toolpath since everything is circular. 

[seth.madore · Accepted solution]

It's just a matter of Tolerance, really. 

Reducing the Tolerance from .1mm to .05mm gives us this:

2024-01-02_08h31_28.png

 

 

[redmond.limited]

Thank you very much for all your replies.  They have all been very helpful and this is now sorted out.