Prototrak Plus Retrofit with Mesa 7i77 & 5i25 cards

Many thanks for all the help!

After tuning both axes, and watching the hal scope, I see changes when "P," is changed, not so noticeable are "FF1 or FF2". The one thing most noticeable is oscillation, especially at higher than 20"/min jog, especially at end or stop of jog, not so noticeable at slower feeds. This oscillation is something that I did not see when powered with old amps, should I re-think the (AMC) amp set-up? Could live with slower feed(up to 5"/min), will try to zero in on the preferred settings to best fit this vs. the full jog speed of 60"/min. The max "P" I used was 5000, this did not make servo vibrate, should I go higher? Tried the FF1 from .01 to .5; Deadband .00001; FF2 .001 or lower(ref to FF1).

Many thanks to all that make this forum possible, your suggestions warmly welcomed.

Why are you only tuning P and FF?

thanks andypugh!

Well there is Deadband that is tweaked as well as P and FF1 & FF2. The speed of the feed effects the out come the most it seems. What are you suggesting?

many thanks!!

Well, normally when tuning a PID controller I adjust P, I and D.

thanks andypugh,
Is there a target value for the I & D, or just trial and error? Will work that in tomorrow.

Many thanks!

The target value is what ever works with your hardware, and configuration. There are too many variables to say x value should with work with y setup. That is why it is called "tuning" a servo. (it is a lot like tuning a musical instrument.)