bot stops for no reason

[whitey]

  i have a professional with lithium battery. it leaves the house at 2890 + & sometimes makes it back at 2550. it intermittently stops, whether on the line or not. it works about 2 1/2 to 3 hours straight. when i try to reset it to go back it wont come on. i have to bring it back to the house, put in code to get a reading . it acts like it just gave up; could it be the heat, lol?  any solutions would be appreciated.

[toolbelt]

Have you tried splitting the 3 hours up into two sections of 1 1/2 hours each.  That way if it's the heat the bot would have time to cool off.

[Botman]

Bad battery?

[RobotLady]

Hi, the next time it is about to come out, press charge to force it out of the base.  Let it sync up and start the blade.  Lift up the handle and rotate the robot to point the nose toward the back of the base.  Press charge again and put the wheels down.  Now follow the robot around the entire length of the perimeter wire.  Look for anything that may cause it to come off the wire.

I am speculating that something is obstructing the robot on its way back home and it ends up in an infinite loop.  It keeps trying to find the base until the battery is totally dead and it can't go anymore.

Give this test a try...

Robotlady

[moti]

Similar to my problem with the 3210 - except that mine always stopped on the wire. Kyodo saw that the motherboard was incorrectly reading the voltage on the battery - and so it would shut off thinking it was out of battery - even though the battery was at 2700. They replaced the motherboard.

The behavior of not being able to power on again is consistent - once the voltage is below the threshold, no button will get it to come on again until you put it back in the charger.

Something must be draining the battery before it can return home.  I have noticed on occasion that if the robot gets stuck on my hilly lawn, spinning the tires for a long while, then it could run out of battery before it gets home - but usually i just find it stuck and displaying "blocked".