Quote Originally Posted by m_c View Post
That's normally because you're using an unsuitable tool type (i.e. a drill, and not an endmill), a toll with too big a diameter, and/or the toolpath settings aren't letting it run at tight enough of an arc to fit in the hole.

You might want to have a look at this video for various ways to bore a hole - https://www.youtube.com/watch?v=nKbEzSleF14
(NYCNC vids are usually pretty good, and their Fusion Friday videos have a good few tips in them)
Morning m_c

Tar very much for the help. Yes I like the videos that mycnc John does, learnt good bits from him. In fusion I was just trying to drill 2 3.5mm holes I selected a 3.5mm twist drill. I will have to go back over fusion videos again beacuse no matter how simple the thing I try to do fusion says no!
Thanks again