MMM 2200KV sounding like a Electric Drill ??
 

Just got my MMM, took it out of the box, installed EC5 plugs and ran it.
Motor is making a electric drill sound, something like a really bad bearing or something.

What can i do?

I'm in Brazil, so it would take 1 month to send it back, and probably 2 months to receive it back from you.

Can't afford waiting all this time. Is there something i can do?
Bearing oil maybe?

if your rotor isn't damaged and you are willing to drive again soon buy a new bearing others you wil need to contact tech support

greets nvt

Both are/have electric motors and may sound alike.
Did you run the 2200 installed in a Rc or just holding it in your hand?
Does your electric drill run okay or does it get hot and smoke?
You can take the 2200 apart pretty easy to take a look around inside. Take the front end bell off and install a pinion(for grip and to hold bushing on shaft) then slowly and strongly pull the rotor out. Note the number of bushing on the shaft on both sides of magnets. It should have some clay on the end of the rotor where it was balancing.

I have a CC 1512 1.5Y that has a distinct "click" over one spot in the rotation of the rotor. Took it apart bearings fine rotor looks ok to me. Any ideas?

It was in my hand!
Runs ok, no heat or smoke!
Took it apart, only one bushing on the front and another on the back. Bearings look ok.
Anything else?
Maybe too much axial play?
Maybe the brass bushing size is wrong?

Are you reffering to the noise that a cordless drill w/a clutch sounds like?

I thought you weren't supposed to run them with out having them installed in a vehicle!!

Uh dude, I hate to tell you this but you NEVER want to run a brushless motor without any kind of a load on it. I think you just blew the bearings

i never got to full throttle, just below middle...

Actually running the motor with no pinion at WOT is required for the new motor/kv test.

Personally
I think he blew a diff.

The motor was in my hand... out of the car...

Please attatch pix of what you are doing.These motors are very "notchy" with no power applied.Or FREEZE may be right and you did f up a bearing?

Noo............... try again

http://www.rctech.net/forum/electric...motor-get.html

http://e-savage.com/forums/showthread.php?t=4527

http://www.rcgroups.com/forums/showthread.php?t=119101

In the castle link software when you do the KV motor test it tells you to either pull the motor away from the spur so there is no load on the motor or just take the pinion off the motor.

Sorry FREEZE.but those links have nothing to to do with the motor k/v test that are now offered through the castle link

IMO it's fine to test a motor with no load on it, you just have to use common sense. Of course pinning the throttle and holding it wide open for minutes will cause problems, but doing short tests at low to mid range throttle for a few seconds at a time isn't going to harm anything.

+1

running a motor with no load won't turn it into a grenade:lol:

Dont panic
 

Yea I do not see any reason to panic about this. Testing a motor of any kind with no load is a fairly common practice in industrial areas. I am sure that most motors are under rated as to their true top RPMs, so you would never want to wind any motor out without being attached to something. The outcome could be catostrophic to the motor and even dangerous. The sound you were hearing was directly related to the fact that you were running it in your hand. Most likely the motor is fine.

+1
Running a motor without load at full throttle won't do any damages...
Thoses NMB bearings are rated for up to 100 000 RPM, so there is no way you damaged it on a no load test.
I personnaly tested a CC 2200Kv motor and other CC motors at full throttle and no load during minutes, and there was absolutely no problems, the motor seems the get warm quickly (40°C) , but it's because it's in your hand at 34°C and it can't cool itself with air flows like it does normally in your vehicle...
So stop panicking when you see someone testing its motor with no load...
More over it drains ~2-3 amp during no load test, so what's the risk guys ??

+1

It's fine to run for a few seconds with no load. Just never run an extended period with no load -- the motor will overheat quickly with no load.

The 2200Kv motor will be quite loud with no load. Remember, the RPM is EXTREMELY high with no load -- it will make quite a racket. :)

-Patrick

Absolutely, but what kind of noise?
AFAIK would be a loud whine, right?
Not grgrgrgrgrgrgrgrgr

Make a movie with good sound and upload it on youtube. Then post the link here.