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Motor › Motor vibrations
10-25-2014 01:48 AM  4 years agoPost 1
Toadster25

rrKey Veteran

Iowa

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I have an align 450l with the BL460MX 1800 kv motor. It's a year old and it seems like it has quite a bit of vibration. When I run it up without the pinion the motor transfers vibrations into the heli. I don't know how much of this is normal. I always thought electrics were smoother than nitro but this thing seem like it had quite a bit of vibration when running just the motor. I guess I'm not sure if it is normal for electric motors to vibrate when running with no load on them. Maybe it is running way faster without a load on it making it vibrate more?

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10-25-2014 01:51 AM  4 years agoPost 2
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

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The shaft could be bent or bad bearings.

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770

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10-25-2014 03:03 AM  4 years agoPost 3
Toadster25

rrKey Veteran

Iowa

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I just replaced the shaft and bearings hoping it would make it better but I don't think it made any difference

I am looking for a new motor maybe a different brand but I can't find anything in stock.

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10-25-2014 03:16 AM  4 years agoPost 4
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

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It could be just a bad motor. Have your hobby shop contact, Align maybe they can get you a discount on a new one.

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770

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10-25-2014 04:54 AM  4 years agoPost 5
EEngineer

rrProfessor

TX

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Toad, check for any "lateral" play in your motor, after "backing" it off from the main blade drive gear.

There should be none at all.

Carefully check to see if the bearings are the cause....or that the motor shaft itself is bent between the motor and the pinion.

Report back on the solution...

FWIW

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10-25-2014 05:02 AM  4 years agoPost 6
rexxigpilot

rrProfessor

Florida

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Did you cement the bearings in with anaerobic glue/Loctite? I once replaced bearings and shaft in a motor and didn't do this. Within a few months the bearings had eaten into the shaft due to slippage. Lateral play was so much that the main gear stripped.

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10-26-2014 02:37 AM  4 years agoPost 7
Toadster25

rrKey Veteran

Iowa

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I figured out my problem sort of. I noticed the motor can moving up and down. It wasn't tight. I think I must be missing a shim or something because when I press the motor can all the way down to take the up and down play out, the shaft sticks out the top of the motor a little bit and it didn't before. The motor is a lot smoother though once I did get all the play out of the motor. I took the motor back apart now and I'm trying to find something to use as a shim.

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10-26-2014 03:31 AM  4 years agoPost 8
EEngineer

rrProfessor

TX

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Good...

Here's an link to a company that might have the exact size motor shim you need:

http://www.mcmaster.com/#

FWIW

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10-26-2014 06:59 AM  4 years agoPost 9
Toadster25

rrKey Veteran

Iowa

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I think I've got this figured out now. First of all I don't think there ever was a shim in this motor. The reason my motor was sliding up and down was from the front bearing moving, I didn't have thread lock or anything holding it because I thought it was tight enough. If you put a shim in the motor it causes it to clamp down on the bearings puting a thrust type of load on the radial ball bearings and that is not good for the bearings. Basically both bearings need to be glued and pressed all the way in before you install the motors outer can that spins. I thought the motors pressed on "can" was what held the motor and bearings all together but if that were the case like I said it puts pressure on the bearings and since the outer can is pressed on there is no way to tell how tight you would be squeezing the bearings.

I used the green thread lock and I hope that will hold it together. I'm letting it dry overnight before I give it another try. I may have screwed up this motor and might just buy a new one.

I'd like to try the scorpion 1880 kv motor but I havnt seen one of them in stock anywhere for a while now. I like the looks of the KDE direct motor but theirs won't fit in between the frames without cutting them off and I don't want to do that.

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10-27-2014 02:22 AM  4 years agoPost 10
EEngineer

rrProfessor

TX

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Glad you solved your problem.

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