Main Page → Active Marker Tracking → Active Marker Tracking: IMU Setup
For the IMU data to be used for tracking in Motive, unique Uplink IDs must be assigned onto each IMU Tag or Puck using the active batch programmer program. Then, the Uplink IDs will need to be inputted under the properties of the corresponding rigid bodies in Motive. Please follow the steps below:
You can download the Active Batch Programmer from the OptiTrack Downloads page on the OptiTrack website.
Before setting up the components, we will want to check the existing configurations on the Base Station, Tags, and/or Pucks. To check this, enable the ‘’Read-Only Mode’’ check box at the bottom-left corner of the active batch programmer, and then connect the devices one at a time via USB. Each time a new active component is detected, existing configurations including the firmware version will get listed under the Log section. If any of the settings do not meet the below requirements, you can re-configure them in the next step.
In order to use IMU Tags/Pucks, all of the active components must have firmware version 2.2.x or above installed. Please check the firmware version on the active components. If the installed firmware is an older version, please contact us for assitance with upgrading the firmware.
Please make sure that all of the active components are communicating through the same channel. Check this and take a note of the channel value as this will also need to be inputted into Motive for IMU data. The RF channel can be set anywhere between 11-26.
The Labels are active IDs assigned to each marker, and it's important that there are no overlapping labels, or IDs, assigned to the same batch of active Tags/Pucks. This setting is applicable to Active Tags/Pucks only.
After checking the settings, you can unplug the device and connect the next one to check the settings.
Now that we understand the existing configurations and what needs to be changed, we can configure the active components. To do this, disable the Read-Only Mode in the batch programmer, and settings configured in the IMU batch programmer will get applied to each newly connected device. Please note that this could also reset the existing configuration, thus, make sure to configure only the settings that need to be changed.
For IMU Tags or Pucks, unique Uplink IDs need to be assigned for each of them. For doing this, simply check the box next to the Uplink ID whenever we are configuring IMU Tags or Pucks.
Uncheck the boxes next to the Set Marker Labels and RF Channel; unless they need to be reconfigured.
All of the Tags/Pucks are pre-configured for every set of devices that gets shipped out in the same order, and we also make sure none of the Labels overlap. Thus, users should not need to use this batch programmer in general. The cases when you would want to reconfigure the active components are: 1) When you have purchased new Tags/Pucks to add to the system from the previous order. 2) When there is a need to change the RF communication channel to avoid interferences.
In cases where marker labels or RF channels need to be reconfigured, enable the box next to the corresponding setting in the batch programmer. DO NOT check the box unless the settings need to be changed. For reconfiguring marker labels, we will need to re-configure ALL of the Tags and Pucks so that the labels do not overlap with other components in the system.
Once we have configured the settings in the batch programmer, connect Active Tags or Pucks one at a time and the programmer will apply the configured settings to the newly connected device, and it will also make sure that the IDs do not overlap in the same batch. Once the settings get applied the details will get listed under the Log.
It’s recommended to note the assigned Uplink IDs for each Tag/Puck so that we can track down the settings easily when needed.
Once a device is configured, disconnect and connect the next device to apply the same settings and unique IDs. Repeat this for all of the active components that need to be configured.
When using an IMU Active Tag to create a custom rigid body, please make sure both the PCB board of the tag and the LEDS are securely attached and rigidly constrained to the object. The attachments of the board and the markers must be rigid within the object for proper tracking.
Now that each of the IMU Tags/Pucks has been assigned with an Uplink ID, the next step is to input this ID into the properties of the corresponding rigid bodies in Motive. Also, the RF channel configured for each active component will need to be inputted as well. Follow the below steps to assign Active Tag ID and Active RF Channel property for each rigid body:
Note: Do not hold down on the power button when powering up the Tag/Puck as it will put the device into a boot mode. When in boot mode, it will not track in Motive and two of the LEDs will light up in orange. If this happens, hold down on the power button again to turn off the Tag/Puck and restart it with just a single click on the button.
Confirm IMU Tracking