Adaptive machining and look ahead

[engineeringQCQFN]

For 2.5D high speed machining, what look ahead should I be looking for?

in general 200 blocks ahead is enough for adaptative tool paths?

thanks!

[jswickJ9PWC]

Why not use as much as your machine can handle? Depending on your toolpath, tolerance settings, radius settings, 200 blocks can be more than enough or just barely enough. 

[engineeringQCQFN]

Roughing:

0.15mm tolerance

0.15 smoothing

does that help? We still don't own the machine, just got a quote from Leadwell and the Fanuc comes with 200 block look ahead and optional is 400