3D ToolPath Question

[Matthew.Maring]

I'm new to 3D toolpaths and am wondering if this is a toolpath issue or a set-up issue.  I'm cutting a slope in some aluminum and getting some ugly tool marks in the corners.  Roughing it out with a necked .375 3FL EM and finishing with a .5 3FL Ball mill.  The ball mill is hanging out approx. 2.75" and I'm using a collet as I only have one .5" hard holder.  I thought maybe I was entering the corner too fast, but I turned on Feed Optimization to slow it down and it didn't change much.  Right now I'm assuming it's a set up issue based on my length to diameter ratio, but I thought I'd check in here and get some input in case it's a tool path issue.  I attached a photo, but want to note that I did sand out the corner a bit.  

Thanks in advance.  

[lee_sanders]

Hi @Matthew.Maring 

I agree the tool overhang is not helping matters and I guess the marks are from the roughing tool path?

I notice you are only leaving 0.007" on your roughing strategy, this is potential where the marks are coming from.

one way you could try is, leave more material on during the roughing tool path then maybe introduce a semi-finishing tool path with your BN, by doing this extra step you would be leaving a constant amount of material to remove with your finishing tool path, which is always preferable when trying to achieve a good surface finish.

I hope this helps.

Thanks

Lee