Having an issue with the operation of a Moog valve not operating in the mid range. I’ve trawled through this forum and online but haven’t managed to find the answer to this specific question.
Over -20 to 20 mA it requires almost full scale before it will drive the actuator, and will only drive it fully open or closed. We have no control at any other point. The servo valve has been replaced 3 times, applying a mA source directly at the Moog to rule out the SFC/Positioner or earth faults in the cable and it remains the same.
The actuator responds rapidly once it sees +\-17mA or so, and remains stable when not being tested and there doesn’t look to be any contaminants/blockages in the reservoir.
Voltages, resistances etc. all correlate to a known working set up which is the same.
TIA.
Over -20 to 20 mA it requires almost full scale before it will drive the actuator, and will only drive it fully open or closed. We have no control at any other point. The servo valve has been replaced 3 times, applying a mA source directly at the Moog to rule out the SFC/Positioner or earth faults in the cable and it remains the same.
The actuator responds rapidly once it sees +\-17mA or so, and remains stable when not being tested and there doesn’t look to be any contaminants/blockages in the reservoir.
Voltages, resistances etc. all correlate to a known working set up which is the same.
TIA.