Connect the feedback linkage between the valve stem connector and the positioner stem.
The Fisher 3560 is a robust, high-performance positioner. Unlike its digital counterparts (like the FIELDVUE series), the 3560 is an analog, pneumatic positioner known for its simplicity and durability. However, its mechanical linkages, cams, flapper valves, and nozzle assemblies require precise calibration. Fisher 3560 Valve Positioner Manual Pdf
What specific (e.g., Fisher 657, 667) is the positioner mounted to? Connect the feedback linkage between the valve stem
Verify the positioner model matches the control system's signal range. the 3560 is an analog
: Clean the internal pneumatic relay. Replace the filter element in your air supply line. Large Deadband Cause : Worn feedback cams or worn linkage joints.