M12 Fuel Impact Driver Blinking Battery Light

[Zinc2005]

Just bought an M12 Fuel impact. Playing around with it a bit and having a strange issue at really low speeds... Basically, if I am barely depressing the trigger to the point where the impact is just starting to spin, after a few seconds the battery lights flash and the impact stops working.

This occurs with both included batteries.

I am assuming this is the override to prevent over-heating, but I am barely using the driver. Is this normal or have I purchased a lemon?

Thanks for your help!

 

[jallyn]

At low-speed / stall-speed, there is no back EMF so motor currents are high. The batteries are just protecting themselves from overload. I wouldn't worry about it and use your tool as normal.

 

[C-Mac]

The Milwaukee fuel series tools utilize brush less d.c. motors which don't rely on motor slip for regulation, as well as being an impact, don't load the motor the same. I would check the contacts that go to the thermistor in the battery pack. Try changing batteries as well. It seems to be common failure mode for the m12 series.