testing my 2240
 

I was testing my 2240 on the bench this weekend, I was testing with 8s lipo and MGM 16024, all was going fine I programed the controler, tested forward, reverse, started rolling on the gas a few times, everything fine, until I gave it a sharp jab of the gas and a spark came off of the controler where one of the motor wires is plugged in. After that the 2240 was in error mode, so I unplugged everything turned it off cleaned the connectors that go into the controler, the one that sparked looked a little black in some areas, plugged it all back in turned it on and it worked perfectly. Why would it have sparked like that? Would a little flux left on the connector cause it? I just want to figure out what happened so I can correct the problem so it dont happen again.
Thanks in advance.
Nick

A brushless motor does not operate effecently with no load. I have heard of people frying there stuff by doing it.

so I did a bad thing, :002: the spark was like the kind you get when you connect hi voltage packs to the controler, I suspect it was from flux on the connector which made a high resistance connection that under high load sparked to an area of lower resistance on the plug. I was just wondering if anyone else had something like this happen to them or knew why it may have happened.

I think you was fine on the low throttle input. it is the jab that got you. I always wonder if the rotor and esc don't read right when not under load. So it accually start or creates a feed back the is not good. But if it still works you may be luckky. I would hate to see that much money go up in smoke with out atleast getting a test run in. I think you will like the esc. I have got one and love it. Have not got a chance to test it on the 2250 yet. Ran mine on a 1950

Yeah, sounds like Flux to me.