Den 2021-05-03 kl. 17:42, skrev Jon Elson:
On 05/03/2021 02:57 AM, Gene Heskett wrote:
More specifically, which of the F's is suitable for forcing a closer to
null settling point when there is considerable friction in the system?
That's the problem! Friction is nonlinear, and it hurts during
acceleration but HELPS during deceleration. So, a single FF2 setting
can never be optimal. You have to use a compromise value.
Assuming machine is lubricated there shear force in oil/grease depend on
speed so it might actually be rather close to viscous friction and hence
rather close to linear. Then an oil/grease pump is used for lubrication
there will be a thin oil film even at slow speed and standstill
otherwise stick-slip effect might happen.
In doubt FF2 make any big difference anyway unless you are able to hit
accurate with FF1.
Nicklas Karlsson
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
