I just understood what William meant that thick stock when cutting out a piece like as a contour the bit might be stuck in the chips, especially when down or up/down cut bits are used.
That happened to me, and now I adjust to that recommendation. Means: the contour should be defined as a pocket with slightly larger thickness than the bit itself, giving enough room to get the chips -and the heat too btw- out. The pocket does not know tabs, so it should be cut as pocket down to some mm as pocket, and the last few mm -thickness of the tabs- will be possible as contour, so the cut will go smoothly.
So far so good.
Worked with few pieces as it should IMO, so the bit runs one depth, and cuts out the width of the pocket, before it goes to the next depth, that way it cuts out enough space for the bit.
Now just recently that did not happen, because the bit first ran a kind of a contour the whole depth before it ran the outer contour of the pocket, that way again the bit cut through almost the whole depth with one run, potentially again causing some stress with the chips.
How can I tell the machine that the bit should cut the layers in a way that it cuts the whole width before it goes to another depth?
I hope I could express what I mean.