Hi,
The robot is not detecting that it is in the charger. We've seen this happen sometimes when the recharging nuts and plates need to be shined up with fine sandpaper.
It also happens if the robot enters the base at an angle and the recharging nuts do not make contact with the plates. For this scenario, verify that the wire is straight for at least 6 feet before the base and check the the ground is level (i.e. no holes or dips that will cause the robot to change its course).
The above two reasons are the most likely cause. Investigate them and you will find the problem quickly.
Have a great day!!
RobotLady
