Faulty ESC help.

[Smit80]

Hi guys,

I think I have a faulty ESC, I have a motor that is just twitching rapidly back and forth.

I know its the ESC as I have tried an alternative motor and signal input. Just wondering if anyone has any ideas if its fixable?

Video:

GOPR0685

[guest325]

Have you tried that motor on a different esc? If it';s definitely not the motor it could be one of a few things:
A bad soldered joint.
Not flashed correctly
Not calibrated.

[Chami82923]

My money is on a bad connection between the motor and ESC, if you are using bullet connectors re-solder them all, if you have soldered the motors directly to the ESC you more than likely have a bad joint at the ESC, i';d re-solder them all anyway (including the ESC connections.

If you are 100% certain its not the motor then re-soldering everything (with some flux) should sort it out.

i did manage to break a motor coil wire, that looked very similar in its behaviour, i ended up replacing the motor.

Callum

[Smit80]

Cheers guys, I have tried an alternative motor and they are directly soldered.

The plot thickens, the underside of the ESC is really hot and it doesnt always stall see here:

GOPR0687

[Oakie]

when that happened to me last year the problem was length of the ac side supply leads. not an issue here though.

I would check how that controler is programed? timing s the like. as surgested earlier a re-flow may do the job. but a possable timing issue so progamming may be to blam.....

Sorry can';t help more....

Paul

[guest325]

Cheers guys, I have tried an alternative motor and they are directly soldered.
The plot thickens, the underside of the ESC is really hot and it doesnt always stall see here:

Might be worth turning it over so that the hot side is up to see if it makes any difference.

[Chami82923]

What fc are you using, with the kk2.1 board I had to increase the minimum throttle to 20% to get the motor to spin up smoothly and not twitch once armed, if you increase the throttle does the motor spin up or keep twitching?

Callum

[Smit80]

Well thanks for all the advise but I think its hopeless bin fodder.

I';m running a Naze32 and manually setting the throttle with the GUI. Ive reflowed the whole board which looked quite a mess before I started! After stripping the cover back it appears to be just one of the FETs that gets really hot. Think I';ll have to order some that arn';t $7';s each lol