Explain the difference between the Captive, Non-captive and External linear actuators?
A.The Captive actuator has a built in anti-rotation mechanism through the use of a splined output shaft that allows it to extend and retract as unit with no requirements for additional anti-rotation. The captive actuator is designed for shorter strokes.
The Non-captive actuator has a lead screw going through the motor and has no reasonable stroke limits but must be attached to an assembly that will not rotate. This will then allow the lead screw to extend and retract without rotating.
The External actuator uses a lead screw and nut combination that extends out from the motor. Linear motion is created by the nut traversing back and forth as the lead screw turns .