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.
Something that will see it sitting at 3% power constantly, and will
raise the gain enough to move it another arc-second for a more perfect
null.
The FF's will never be of value there. This is what the I
term is SUPPOSED to help with, but I
have not found it to really accomplish much. That may have
more to do with the servo characteristics of my machines,
though.
Jon
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