to Custom.
Set the Wand Length (mm) field to 1000.4.
Set the Center Distance (mm) field to 350.5.
Select the BTSensors you would like to calibrate from the list in the Camera Pane.2.
Calibrate the system as you would above, confirming you would like to only calibrate the selected3.
BTSensors.
Once complete, you do not need to set the ground plane.4.
Note: You will see all BTSensors collecting data. Only the selected BTSensors will use this data to
calibrate, and all other BTSensors will ignore this data. When calculating, Motive may return a poor result
overall, but this is not indicative of the actual result of just the updated BTSensors, it is reporting as if
you wanded the entire Space. It is important to verify the tracking data with a Beacon after a partial
calibration has been completed to verify the calibration results.
Known Wand Calibration Issues
Issue: When Calibration Engine is calculating, calibration might return a very high error (100+), a
very poor rating for the BTSensors, and you may see the distortion map in the Camera View warp
outside the camera square.
Solution: Either the wand data you provided Motive does not match the real world wand (check
the wand length and center distance from above) or Motive displays unsuccessful results. Reboot
Motive and run the calibration recording again through the solver and if the wanding data itself is
good, this normally fixes the issue.
Issue: After calibrating multiple times the Calibration Engine will not give a Global “Excellent”
rating.
Solution: The data samples taken from wanding may be of poor quality and could be an issue.
Ensure the Space is properly masked from infrared interference, and BTSensors are aimed
correctly. Start calibration again and rewand the Space.
Note: Not all the BTSensors will always receive an 'Excellent' or greater rating. Acceptable tracking can
still be achieved with what appears to be poor results. The calibration report will let you know how
accurate each BTSensor is relative to each other. If one BTSensor is poor, it might be okay if there are
several other BTSensors seeing that same area.
Tip: The best way to verify calibration is to lay out the ground plane and ensure that each point is only
shown as 1 marker (not two or more points or the points are moving when the ground plane is sitting on
the ground and not moving).
Ground Plane Calibration
After the BTSensors are calibrated with the calibration wand, you must set the ground plane. This step
will inform the BTSystem where they are in relation to the origin. It will also inform the BTSystem the
direction of the axis.
Attention: The origin of the Space must be visible to a minimum of 2 correctly calibrated BTSensors for
ground plane calibration to be accurate.
Note: As of Motive 1.10, when performing Refine, Full Refine, or Partial Refine calibration types, the
user does not have to reset the ground plane.
To calibrate BTSensors with the ground plane
In the Physical Space, unfold and lock the ground plane into an L shape, ensuring the arms are at a1.
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