A reply from the Mach3 forum for this problem....


Gazillion of short segments, no arcs.
Even setting lookahead sky high will not help you having better part.
Your CAM is not generating G2/G3 code, only G1, which is linear interpolation versus circular interpolation.
I have no knowledge on madcam, I use Aspire (as is Tweakie) where I can do a curve fit.