Hi folks,

Some time ago I purchased this combo, and it worked quite well until I bent the motor shaft during a bad take off when the prop hit the ground:

http://hobbyking.com/hobbycity/store...idProduct=4710

As a replacement for the motor, I purchased this unit and changed the mounting set up to accomodate the new configuration (I kept the same ESC as above):

http://hobbyking.com/hobbycity/store...idProduct=4899

When I first tested the new motor, it would not turn smoothly and would only "twitch." While trying different things, I switched two of the motors leads around and everything started working just fine. I tried it a few times (on and off, etc.) and no problems, so I finished the installation without chaging the electrical set up. After everything was finished and the prop was on, I turned the motor on and the same twitch was back.

Does this sound familiar to anyone? Could there be some incompatibility between the motor and this ESC? If not, would this be typically caused by a faulty motor or a faulty ESC? Just trying to figure out where to go next. And by the way, I am using a 3S LiPo batter as the power source.

Thanks for the help.

I know the "pros" say this doesn't happen, but it DOES. Just yesterday I hooked up a HiMax 5330 to an Electryfli SS60 ESC the motor was running smoothly, but backwards, so I did the "switch any two wires" thing. On the nexty start-up the motor simply stuttered (as I call your twitch), but wouldn't run. Changed a different combination of two wires and got in five flights with no problem.
Walt

Walt,

Exact same scenario here: I changed two of the wires (again) to no avail. I then changed the third wire with one of the two other wires and bingo, it started working fine. It seems only certain combination(s) work.

What doesn't make sense to me is why it worked for a while the first time before it started stuttering (or is it twitching?) again. Either way, for now it seems to be working.

Glad you got it solved. Experience triumphs over theory again!
Walt

I've experienced this as well. I thought it was a speed controller problem so I stopped using the speed controller altogether. It was a Hyperion 20A ESC