Inside the Trimble X9: Deep Dive into Trimble X9 Auto-Calibration 5
Figure 3: Typical Error Curves from Scanners
Figure3showsadiagramofthismisalignmenteffectbetweentheEDMlaserandtherotationaxis.
Datafollowingsineandcosinedistributionsistypicalofthiseffect.Thecurveiscalibratedwiththe
internalcollimatorandtheverticaldriveinsidethealidade.Inthefield,thisself-calibrationis
completedbytakingafewspotmeasurementsatdifferentverticalangles,gatheringenoughdata
tocreatethecharacteristicspreadtofallwithintheaccuracyrange.
Automatic Angular Calibration
TheangularcalibrationisdonewiththeX-Drivedualverticaldeflectionsystem,whichcalibrates
theangularaccuracyoftherotatingmirrorbyusingtheservosystemandtheauto-collimator.A
correctionisappliedtothecollimationerror,i.e.,thedeviationoftheHorizontalAxis,orVertical
Axis,orSightAxis.
