Why does this occur?

• A

  Andy

  4/23/25, 4:09 PM

  The following error occurs:

  "Wrong motor position range detected for gripper. Expected to be in nominal range of [0, 100] % (a full linear translation), with a maximum range of [-10, 110] % to account for some imprecision during calibration issues creating an artificial jump in motor values. You need to recalibrate by running: python lerobot/scripts/control_robot.py calibrate."

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• T

  Tom

  4/23/25, 4:16 PM

  Error encountered: "Wrong motor position range detected for gripper"

  Root cause: The gripper motor's actual position exceeds the system's expected range (nominal range [0, 100]%, maximum allowable error margin [-10, 110]%). Upon detecting this anomaly, the system enforces recalibration to prevent mechanical damage or logical errors.

  Maybe reset the midpoint of each servo can solve it. You can see 4 section of  https://aifitlab.com/blogs/tech-blogs/lerobot-so-arm100-assembly-guide to reset servo if you has already assembly the arm.

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