831 stages are an integration of our 331 translation stage and our 841 actuators.  By combining the actuator and the stage we have created a smaller package.  Our e series and MC2000 controllers drive the stage through a closed loop interface between the controller and the motor encoder.  The closed loop connection ensures 0.2 μm and 0.1 μm resolution, respectively.  The encoder coupling also enables the use of the DR1000 digital readout for repeated or relative positioning requirements. 

   There is a quick reference scale on both the top and bottom of the drive housing.  They are available in either right or left hand versions.  831s are stackable for XY positioning requirements and are compatible with our MX-AB for Z axis applications.  High-speed versions available upon request.