M400 CNC 11 and Look-Ahead depth?

[jake2465]

Is the look ahead depth for CNC11 dictated by parameter 99, or is that only valid for Intercon? I am trying to figure out what the look ahead depth is for when g code is simply downloaded from a flash drive and not through Intercon. My parameter 99 is set to "1" as it currently stands. I notice that when running live 4th axis, the movements when the 4th axis is in use tends to be a little on the choppy side. I took a test video of the machine doing a Fusion 360 "flow" CAM cycle to make this mock up cam lobe. The feed rate was set to 24ipm and the program did finish out correctly to the end which I am happy about, but I noticed that it seemed to have stuttering when making it's way around the ends of the lobes. I am not sure if that is a case of the control not being able to process the code fast enough, or possibly the look ahead depth not set correctly?

I have included my parameters in the post. The only alteration I made was setting the control to "precision mill" smoothing. That helped settle down the overall stuttering of the mill to a good extent, but what is seen on the video is also after the smoothing was toggled on.

https://www.youtube.com/watch?v=Ym1FvKstiMY

[cncsnw]

Parameter 99 governs cutter compensation lookahead, for resolving potential interference (e.g. when you send a large cutter into a small corner with G41 or G42 cutter compensation active. This applies to all G codes that use cutter diameter compensation, not just those posted from Intercon.

Accel/decel lookahead is much deeper; is not affected at all by Parameter 99; and follows different rules depending on whether or not you have smoothing (a.k.a. AD2) active (as you reportedly do).

[jake2465]

Ok, So it sounds like I will need to make adjustments to the smoothing settings to get the accel /decel working better?