On 06/27/2016 02:41 AM, Danny Miller wrote:
> In a similar thread, I'm doing 3D carving with some aggressive
> acceleration profiles.  The XHC mpg is SUPER rough when stepping around,
> it's supposed to allow you to use different accelerations for mpg
> inputs, but none of that section has ever worked.  The mpg works but the
> section's options don't.

If the behavior doesn't match the documentation, that's a bug, please 
log it on the github issue tracker: 
https://github.com/LinuxCNC/linuxcnc/issues


On the MPG on my machines I use ilowpass to smooth the output of the jog 
wheel before sending it to LinuxCNC.

One click from the MPG becomes a smoothly accelerating & decelerating 
curve of 1000 clicks (each 1/1000 the size) going out of ilowpass and 
into motion.  This makes the MPG motion much smoother.

Here's an example of using ilowpass with an MPG:

https://github.com/LinuxCNC/linuxcnc/blob/master/configs/common/shuttle.hal#L215


-- 
Sebastian Kuzminsky

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