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    mBot Ranger Cannot Follow Line Correctly

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    Makeblock Customer Service Team

    This article applies to mBot Ranger.

    When testing mBot Ranger, it is recommended to place the line-following map in a low-light location. The line-following sensor does not work well in strong light.

     

    1. Issue Description

    When running line-following related programs or using the line-following function in the Makeblock App, the product does not follow the correct route.

     

    2. Possible Causes

    1. Wiring error
    2. Connecting port or cable failure
    3. Program created is incorrect
    4. Line-following sensor failure
    5. Problem with the machine itself, such as abnormal mainboard

     

    3. Troubleshooting Steps

    1. Under factory setting, the line-following sensor needs to be connected to port 9 of the mainboard for mBot Ranger to running properly. If you created a program yourself, please make sure that the port connected to the line-following module is consistent with the settings in the program. If the line-following function in the Makeblock APP still doesn't work, you can update the product firmware first.
    2. Replace the sensor's connection port and RJ25 cable, test whether it can follow the line normally to check the parts problem.
    3. If you have created your own program, please send us a screenshot or file to test.
    4. Check whether the sensor is faulty by the following steps: 
    • Connect the Ranger Module to one port of the main control board and power the mBot Ranger. Put the sensor close to a white table or white paper (detection range: 1~2cm) and check if the corresponding two LEDs on the sensor are on.
    • Move it away from the white table or paper and confirm that the two LEDs corresponding to the sensor are off. 

    • If the LED for each sensor lights up when the sensor is placed over a white background, and turns off when the sensor is away from the background, it means that the line following sensor is normal. Otherwise, the sensor is probably faulty and can be replaced with a new one for testing.
    1. If the problem persists after troubleshooting the above steps, motherboard replacing can be considered. Please contact the support team for replacement of parts involved.

     

     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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