Trimble X7: Auto-Calibration Eliminates the Guesswork

Issue link: https://geospatial.trimble.com/en/resources/i/1468600

Contents of this Issue


Page 4 of 11

Inside the Trimble X7: Deep Dive into Trimble X7 Auto-Calibration 5 5 Figure 3: Typical Error Curves from Scanners Figure 3 shows a diagram of this misalignment effect between the EDM laser and the rotation axis. Data following sine and cosine distributions is typical of this effect. The curve can be calibrated with the internal collimator and the vertical drive inside the alidade. In the field this self-calibration can be completed by taking a few spot measurements at different vertical angles, gathering enough data to create the characteristic spread to fall within the accuracy range. Automatic Angular Calibration The angular calibration is done with the X-Drive dual vertical deflection system which calibrates the angular accuracy of the rotating mirror by using the servo system and the auto-collimator. A correction is applied to the collimation error, i.e., the deviation of the Horizontal Axis, or Vertical Axis, or Sight Axis.

Articles in this issue

view archives of Whitepapers - Trimble X7: Auto-Calibration Eliminates the Guesswork