Calibration settings

For high-quality data capture, it’s important that the calibration settings be entered correctly in QTM.

1. Open Project Options by clicking the gear icon in the top toolbar or by typing keyboard shortcut Ctrl+W.

   

2. Navigate to “Input Devices” à “Camera System” à “Calibration.”

   

3. Beside “Calibration kit type,” select the calibration kit that you’ll be using.

   

4. Below this, type in the exact wand length as printed on the end of your wand. This is the precise distance between the reference markers.

5. Under “Coordinate system orientation,” confirm how you want the X, Y, and Z axes to be oriented with respect to the L-frame. By default, the long side of the L-frame will define the X-axis, while the shorter side will define the Y-axis.

   

6. If you have an especially large recording volume, you may want to increase the maximum number of frames used as calibration input.

   

7. Below “Apply coordinate transformation,” you can translate and rotate the coordinate system set during calibration to any desired position and orientation.

   

If you navigate to “Calibration” à “Calibration Quality,” you can adjust when QTM will recommend a new calibration.

For example, you can be reminded to calibrate when the tracking residual exceeds a certain number of millimeters or after a set number of hours.

The calibration symbol in the QTM status bar will display yellow when a new calibration is recommended and turn red when the current calibration has expired.

Once your settings are chosen, click “OK” to save them and to close Project Options.