I need some help with servo jitter/shaking.
I’m running 3x MG996 servos off a PCA9685 board on a raspberry pi 3b+. The servos are powered separately from a dedicated 11.1v Lipo, stepped down to 5v.
Movement with nothing attached to the servos seems relatively smooth, but as soon as there’s any load (I’m building a lightweight robotic arm) they jitter, sometimes to the point of violently shaking.
Have spent time googling it, and seen solutions ranging from ferrite donuts to capacitors, but I’d prefer to have a better idea of the cause before buying anything.
Are ferrite/capacitors likely to fix the problem? Or is there something else I may be missing?