PID

Hello there, I need advices for just how to adjust a cart that just moves in a short single horizontal line? I'm just a beginner...

More info, please.

The system is not stable at all when I try values for PID, and I left these parameters at their default values:

Max. Output:10
Min. Output:-10
Output scale:10

Do they need to be changed?

Is this an analog controlled servos? (Mesa step/dir setups have PIDs to but they don't need tuning.)

Normally those output settings don't really need to be adjusted.

Do you know how to use Halscope to monitor the feedback while you tune your PID loop?

Do you know what kind of command the drive is expecting as an input? (torque, velocity, postion)

and that's not PID settings - they are analog voltage range and scaling

PID settings for servo ill definitely need adjustment.

yes it's analog, and we use velocity controlled mode
when I just enable the servo(without giving motion commands) this appears to me on the Halscope

ibb.co/XWj9Th3

and the value of the last two decimal digits i.e. y=0.0xx fluctuates.
is it just a noise problem?can it be fixed by EMI filter?, or something else causing the problem?