Simultaneous 4th Axis Cut Moving Too Slow

Hi, 

I haven't asked a question in a while but I am machining something new on my mill with my 4th axis and it is requiring me to do a simultaneous 4th axis cut which I have not done before. I had some issues simply getting to tool path to post correctly.  I finally figured that out but now the cut is going extremely slow.  The velocity is supposed to be cutting at 46  in/min.  The post processor is indeed posting this velocity with "F46", however the cut is going extremely slow. Since the post processor is outputting the correct velocity I do not think it is the post processor that is at fault but something going on with linuxcnc. The endmill is taking such a small cut that the aluminum is coming off as fine dust.  The "vel" on the display is showing around "2" (I am not sure if this is in inches/min or not).

In my INI folder the max angular velocity is set to "33" and I can jog the 4th axis faster than what is going on in the cut.  So I do not think this is the problem.. I have outputted code in both the normal velocity profile and in the inverse profile and neither seem to help.

The cut is just a circular arc but the center of the arc is not centered with the rotational axis.  The tool path is just a contour where I need the tool to remain perpendicular to the arc. 

I appreciate any help or words of wisdom!
Best,
-Dylan

Wow aciera youre right again. I cant believe that was the issue. But if anyone is seeing this in the future turn up your smoothing and tolerence in fusion 360.

My line segments are about 1 to .5 thou now (they were down at about a 10th before) and i can get up to somewhere about 60-80 percent of my feedrate which is way faster. Theres work to be done if I needed to cut a bunch of aluminum but this is a test cut for inconel, so this speed will work just fine!

Thank you sir!