Quote Originally Posted by ger21 View Post
I've seen the same marks when cutting at higher feedrates than you're using, even on big industrial machinery.
That's interesting Gerry, may be my feedrate is too high for this tool. I have the 8mm version which I will test cut, and may point to deflection in the 1/4". With the 1/4" cutter I have been cutting in 3 passes at 6.25mm, G wizard had a red warning for deflection with passes any deeper.