Actuator X1

• From calibration data in \\Samba-gb.gb.nrao.edu\doc\gbt\subsys\servo\calibrationdata\subreflectoractuators\completeCalibrations_6_99\x1.
• Calibration measurement data from HP interferometer is actually 2x measured distance in inches
• Calculated linear minimum least squares error fit for extending and retracting calibration separately
• Extending linear calibration is 0.999839 interferometer inches per encoder inch
• Retracting linear calibration is 0.999805 interferometer inches per encoder inch
• Over 32 inch stroke the calibration difference is ~ 1 mil.
• Standard deviation of difference between residuals of extending and retracting calibration is 0.61 mils. Mean of the difference is 0.03 mils.
• Maximum deviation of linear calibration from measured length is ~ +/- 3 mils. Error: (3) can't find X1Resids.jpg in Main