Just finished building Miniac's mighty mini stuka. Plugged in all the electronics to test, and my motor's spinning oddly slow. Pull it and the esc out and when spinning the motor with my fingers, it's tricky to turn. I figured the bearing was shot or something, so I unplugged the esc and suddenly the motor spins freely again. The esc is completely unplugged from everything else, but when I plug the motor wires into it the motor suddenly seems to be breaking constantly. What could be causing this and how can I fix it?
Motor spins freely only when unplugged
- Thread starter Raxaphone
- Start date
Burnhard
Well-known member
Might be a motor break from the esc. Do you have a spare esc to test?
I do, I'll check it
Foamforce
Elite member
Yeah, that’s exactly how motor brakes feel. Having the motor brake on is generally a good thing, so as long as it powers up normally, you shouldn't have to change anything. PS, turning on the motor brake reduces drag when the motor is off (so you can glide further), and reduces prop breakage when belly landing.
When using dynamic braking, be careful not to have the braking set too high. You don't want to spin at several thousand rpm and have the brakes slam on when you reduce the throttle to zero. It can break props or even rip the motor from the mount. Start with a minimum setting and increase until it slows and then holds the props still while at speed.
Houndpup Rc
Legendary member
Actually I just had a problem that sounds like this...So when I start to throttle up a new motor and stutters really bad and doesn't accelerate..If you move the wires around a bit it spins normally...then you move them more and it happens again...this is caused by one of the wires going to the motor having a small break are something in it so it getting a break in the circuit.
Mr Man
Mr SPEED!
I was talking about the ESC setting for stopping the motor at Zero throttle.
It's not something I set up, it seems like a manufacturer pre-set. How can I adjust it if needed?
Mr Man
Mr SPEED!
My Ultimate 3D did come with one from the factory……. Though it’s a 3d aerobatic plane..
Foamforce
Elite member
Yes, it’s a setting that can be adjusted in most ESCs. You’ll need to find the manual for your ESC, but there’s usually a series of stick commands you use. They generally start with putting the throttle on high and plugging in the battery. You’ll hear a number of tones from the motor. Then you move the stick up or down to select settings and choose values. The specifics are different for each ESC though, so you’ll need your manual.
BNF/RTF
It's a cheap 30 amp esc from Amazon, I'm a high school student with no income so I absolutely cannot afford higher quality electronics. Doesn't matter too much to me if a plane tries to become a hunker buster, half the fun is in building and if all my servos are tied up in existing models I can't make more!
Foamforce
Elite member
Houndpup Rc
Legendary member
I was wondering...Do you want a brake on a 3D plane?
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