Large chamfer small tool

[Reno_Raines01]

Hobby cnc guy here, can't figure out how to program fusion (3 axis mill) to mill this large chamfer with a 45° 8mm chamfer mill, the slope is too long to do it in one go. 

What 'strategy' would make this possible?

[Spencer.AC]

Easiest way to hit that feature would be a second setup with an angle block and run a facing path. Otherwise you would have to program multiple chamfer toolpaths with varying heights and tool tip offsets and attempt to blend them together. Without a 5th axis, those are your options.

[engineguy]

@Reno_Raines01 

Question, first, are all the slopes actually at 45 degrees ?? If not then not going to be easy 😞

If yes then you can maybe approach it as a 3D job and use for example the 3D Adaptive with a reasonable size tool to rough out the majority of the material and finish off with a 3D Contour toolpath as in the image below and the attached example file, that is just what it is, an example of one way how it could maybe achieved 🙂 🙂

[Reno_Raines01]

Thanks for pointing me in the right direction 👍👍, made it work with the 3D contour.

[hunt_fred]

Trying to do a large chamfer with a small tool always looks bad... you will get pronounced blends at every pass (tool deflection, inaccurate tool angle grind... I don't know, it just always looks bad).  If I don't have a large enough cutter & it's not on a multi-axis machine, I will surface the chamfer with a ball or bullnose cutter.  I generally use a flow toolpath parallel with chamfer.

[brad_francola]

Hi.  You can do a standard 2D Chamfer (or 2D Contour) and then apply a linear pattern.  Select the edge of your chamfer to set the direction.