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    Self-balancing Robot Fails to be Balanced

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    Makeblock Customer Service Team
    This article applies to mBot Ultimate 2.0.
    Note: If you encounter problems with the machine running in this mode, make sure that you are controlling the machine through the “Self-Balancing Robot” mode in the “Play” section of the Makeblock APP.

     

    1. Issue Description

    When the Ultimate 2.0 was built into Self-balancing robot form, the machine was never able to balance, or could only balance for a short while before falling over.

     

    2. Possible Causes

    1. The motor cables of the two motors are plugged in reverse
    2. Mixing 185RPM motor and 86RPM motor
    3. Battery power supply problem
    4. Gyroscope sensor failure
    5. Assembly problem (e.g. metal beam holes not aligned, screws loose)

     

    3. Troubleshooting Steps

    For the above reasons, you can check the following steps one by one.
    1. The correct wiring for the motors is as follows (with the robot facing you), the motor on the left is connected to Port1 on the motherboard and the motor on the right is connected to Port2

     

    1. The Self-balancing robot form uses two 185 motors (there are two 185RPM motors and one 86RPM motor in Ultimate 2.0). You can identify the model by comparing the white label on the motors (as shown below).

     

    1. Self-balancing robot requires to be working with full power. If you use the battery holder to power, please install new Nanfu AA batteries and do not mix old and new batteries. If you are using the Makeblock 18650 lithium battery pack, it is recommended to charge the battery before trying again, while adjusting the installation position of the battery pack to see if it works.
    1. Test the on-board gyroscope sensor in the mBlock 5 software to see if it works properly. Refer to the following case program for specific test methods: https://support.makeblock.com/hc/en-us/articles/7314775112471-Case-11-Simulate-a-self-balancing-robot 
    1. Improper assembly can lead to an unstable center of gravity, which in turn affects the Self-balancing form and the motor cannot adjust the action properly. You can double-check this by comparing the assembly guide. Take the following screw problem as an example:
    a. The headless screws on the left and right motors must be pressed against the D-shaped surface of the motor shaft.

     

    b. There are 9 round holes in the red box in the figure below. When fixing the motherboard and the metal beam with screws, the screws must be in the 5th hole position - that is, the hole in the middle, otherwise it may cause unstable center of gravity.

     

    4. Still Need Help？

    If the problem is not resolved, please contact us via service@makeblock.com with the necessary details of the fault, such as order number, operation video, device firmware and software version.

     

     

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