Tuning hydraulic systems can be a frustrating trial-and-error process. It is not always clear how changing one control parameter will affect the function of the system. Often, tweaks to tuning parameters can make things worse rather than better.
Most controllers employ standardized PID (proportional integral derivative) control loop gains that relate the current state of the system to the next desired state. Engineers must set the appropriate gains in order to get the system to move correctly.