Some times i am getting this weird deflection when cutting the Tee pieces (semi circles) at the end of a rectangle cutout. shown bottom right in the picture.
This only ever happens with the 1/4inch Compression cutter I am using at full depth, the initial passes with the downcutter are very neat like the one on the left.
I can also hear the bit biting into the corner when it happens. It doesnt always happen as you can see here both were cut in the same pass and the left one is fine. sometimes it is a big wobble like this one sometimes it is very small.
Ive checked v wheels, z axis and belts, and I have cleaned the tool and collet. so now I am stumped about what is causing this, so if anyone could give me more things to try I would really appreciate it.
I have tried cutting at normal speed and at 50% feedrate reduction but it still happens.