Mea Hawk - THEORY OF OPERATION & DESIGN; 3-1 Design Principle

MEA INC
2600 American Lane | Elk Grove Village, IL 60007 | USA
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MEA Incorporated | Hawk Actuator Instruction and Operation Manual
02/2018 15
sure to inspect for any indications of damage that may have occurred during shipping. If any signs of
damage are detected, please contact MEA Inc immediately to determine the appropriate corrective action.
In addition, verify that the received items match the accompanying packing list. If any discrepancies exist,
please contact MEA Inc immediately to determine the appropriate corrective action.
3. THEORY OF OPERATION & DESIGN
3-1 Design Principle
The Hawk’s Hydraulic Power Source (HPS) design utilizes a bi-directional gear pump directly coupled to a
servo motor. In conjunction with the pump & motor, electronically controlled solenoid valves are used to
sequence flow operations. Servo motors are ideally suited for this application due to their ability to
reverse direction, operate with variable speed, and maintain a fixed speed when being over-driven.
When the actuator is moving, all fluid passes through the pump, permitting a controlled variable rate
addition or dissipation of energy. The pump and servo motor control fluid flow rate and direction while
the solenoids only perform lock in place functions, not fluid flow regulation. The speed of the unit is a
function of pump displacement and cylinder volume only.