How to Configure a Drivetrain (No Gyro)

When starting to program with VEXcode IQ Blocks, Drive and Turn blocks will not appear in the Toolbox until a Drivetrain has been configured.

You can only configure one Drivetrain per project.

Here are the different options when configuring a Drivetrain without a Gyro:

  • Adding a Drivetrain
  • Changing a Drivetrain’s Port Numbers
  • Changing a Drivetrain’s Wheel Size
  • Changing a Drivetrain’s Wheel Base
  • Changing a Drivetrain’s Gear Ratio
  • Reversing a Drivetrain
  • Deleting a Drivetrain


Adding a Drivetrain

To configure a Drivetrain, select the Devices button to open the Devices window. 


Select “Add a device.”



Select "Drivetrain".


Select which port the Left Motor and Right Motor is attached to on the VEX IQ Brain. Ports that are already configured for other devices will be unavailable.


Turn the Gyro off by un-checking the Gyro box.


Once the Drivetrain has been configured, select “Done” to submit the device to the configuration or “Cancel” to return back to the Devices menu.

Note: Selecting “Cancel” will undo any changes you have made to the device and will not be a part of the configuration.

Note: If you are not configuring the Drivetrain for a VEX IQ Clawbot, see the additional options below.


Changing a Drivetrain’s Port Numbers

You can change the port number for the Left Motor or Right Motor in the Drivetrain by selecting the device’s plug icon in the top right corner of the Options screen.


Select a different port on the Port Selection screen and the port number will turn green. Then select Done to submit the change.


Changing a Drivetrain’s Wheel Size

You can change the wheel size for the Drivetrain by selecting the drop down menu under “Wheel Size”.

Note: The default values are for the VEX IQ Clawbot. If you are using the Clawbot, you do not need to change the values.


Changing a Drivetrain’s Wheel Base

You can change the size of the wheel base for the Drivetrain by entering the values in the number box and by selecting the drop down menu under “Wheel Base”. The wheel base is the measurement between the middle of the front left wheel to the middle of the front right wheel.

Note: The default values are for the VEX IQ Clawbot. If you are using the Clawbot, you do not need to change the values.


Changing a Drivetrain’s Gear Ratio

You can change the gear ratio for the Drivetrain by entering values in the “Input” and “Output” boxes.

Note: The default values are for the VEX IQ Clawbot. If you are using the Clawbot, you do not need to change the values.


Reversing a Drivetrain

The Options screen also allows the direction of the Drivetrain to be reversed.


Deleting a Drivetrain

A Drivetrain can also be deleted by selecting the “Delete” option at the bottom of the screen.