0-10v Servo Control with 7i76E

Hi, stupid mistake. I had to change the sign/direction of the feedback. But there seems to be a problem with my board. There is noise in the analog signal. And with 1000 revolutions per minute and without a pid regulator I get spindle-vel-fb-rpm-abs 1005-1010rpm

should I filter the analog signal?

 

What do you think of the scheme?  I can also upload a simulation ?
In simulation it's good, but in real life it's not good

Maybe I should add a capacitor in parallel with the resistor R28 ?

I think the filter is not needed, also feedback is likely not needed either
as speed variations of a few % will have no significant effect on machining
or spindle synchronized motions as long as your encoder resolution is greater
than say100 PPR.

I have big plans for the lathe . I will add another spindle in the future. This one should work as a C axis. Currently the resolution of the servo motor is 2048x4 = 8192 . I will add an additional encoder connected to the spindle with gear 2:1 or 3:1 ( 8192x 2 or 3 ).