R/C Tech Forums - ? about LRP esc

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I recently picked up a nice used LRP Sphere TC Spec esc and today was the first time I got to try it.We had an open practice day at the track,so I ran pretty much non-stop.My whole setup is FT B4,SMC 5200 40C(2S),LRP TC Spec,7.5 Vector x-12.

My question is about the lipo-cutoff feature,I think.:lol:Both times I ran,I went for 20 minutes or more non-stop.At the end of my runs the motor seemed to just seize up halfway down the front straight.It may or may not have slowed down a couple seconds before this happened.Hard to tell because I never used more than 1/2 throttle on the straight.Anyway,the rear wheels locked up and the car skidded to a stop right in the middle of the straight.I had steering,but the car would not move.By the time I got down from the stand and picked my car up off of the track,the throttle worked again.:confused:I checked my pack when I got back to the pits and the cells were at around 3.3v each.

I'm guessing that the lipo-cutoff kicked on.But is the motor supposed to lock up like that? I'm used to the power being cut back,but never saw anything like this.Even coasting with no power at all would be better than this.Hard to steer your car off the track when back wheels won't move.:cry:

Any ideas?

There might be a way to setup the lipo cut off to do that but mine would slow down to where it's still drivable but really slow. Did you re charge the battery and drive it again? Was the motor hot?

Quote:

Originally Posted by ckfactory (Post 7197397)

There might be a way to setup the lipo cut off to do that but mine would slow down to where it's still drivable but really slow. Did you re charge the battery and drive it again? Was the motor hot?

Yes,I ran two full cycles through the pack and it did the exact same thing both times.I'm pretty sure it has something to do with the lipo cut-off because it happened on the straight both times and that would probably be the place that pulls the most amps.I didn't check the motor with a temp gun,but it wasn't very hot to the touch.And the esc was hardly even warm,and that's without a fan.

I set the cut-off according to the manual because this esc is all new to me.I didn't see any options though,only on or off.I'll go look at the manual again but I'm pretty sure that there isn't any adjustable settings for it.

Thanks for the reply!