I have two similar Horizontal Machining Centers with Fanuc 15MB controls, one of them runs high speed tool paths very smooth, the other does not. Seems like high speed look ahead is turned off or something. The only option parameters that I see different are the 9106.3 and 9120.3 and 9134.0, can someone explain what these do? Machines are almost identical on control side, except one has 5 axis and one has 6 axis, some of the added axis are for controlling the pallet/tool changer, otherwise machines are standard 4 axis HMC's.

I process things at 380 IPM on the one machine without much issue but the other machine I run into stuttering issues at 80 IPM, thoughts/ideas guys?

Thanks,
AJ