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HomeAircraftHelicopterMain Discussion › Motor smoking ... need advice
06-15-2015 08:47 PM  3 years agoPost 1
tgreen

rrNovice

Western Pennsylvania

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I was trimming a Raptor 550E FBL on the third flight when I noticed a small puff of smoke come from the motor. The motor stopped and I was able to land the machine. I had just finished setting up the ESC (Talon 90) governor mode. It’s been several years since I set up a new machine and this is my first time programming an ESC.
I was able to test the ESC with another motor. It seemed to work fine. However, the motor when connected to another ESC does nothing (except begin to smoke again ….no tones, etc.). I’m not sure if the programming that I did on the ESC could have damaged the motor. Maybe the motor was faulty?? Not sure. But I don’t want to damage another motor or crash the heli due to a mistake that I made programming. Any suggestions relative to ESC programming damaging the motor?? Thanks in advance for the input.

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06-15-2015 09:07 PM  3 years agoPost 2
RM3

rrElite Veteran

Killeen, Texas - USA

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smoking from a motor indicates two things...

the coils are burning up from too much current or wrong frequency and are begining to vaporize the oil or burn the insulation due to wrong programming from the ESC

or

there is now a short circuit somewhere in the motor and the programming was not to blame.

once you have smoked a motor to the point you can also "see" the smoke...
you have killed the motor... sorry.

if the ESC is working with another motor, then it must have been an issue with the motor.

as long as you program the correct pole number into the ESC and are using the proper voltage to the motor... there should be no smoke.

showing a preference will only get you into trouble, 90% of everything is crap...

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06-15-2015 09:09 PM  3 years agoPost 3
utahbob

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St. George Utah

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short out?
Could something have gotten into the motor..A friend once lost track of a small screw while working on his heli; and it had gotten in the motor..he toasted it on spoolup.

I do a great decending funnel!

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06-15-2015 09:21 PM  3 years agoPost 4
tgreen

rrNovice

Western Pennsylvania

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Pretty sure nothing got into the motor. It was fine the flight before (2nd flight) and only sat on my tailgate in between flights. I know the motor is now garbage. I would like to know what may have caused the problem, but more importantly I dont want to destroy another motor. I'll change to a new ESC if the Talon 90 could be to blame. Someone mentioned a short caused by a bad solder joint in the Talon 90 ...a problem believed to exist with those???

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06-16-2015 12:14 AM  3 years agoPost 5
boomstrike5

rrApprentice

Sacramento, Ca, Usa

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Make sure your mounting screws are not to long and shorting the wires or windings in the motor.

MA Graphite 46, MA 98 SE, MA Ion X2, Whiplash EX, Synergy E7SE

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06-16-2015 12:40 AM  3 years agoPost 6
Flying Foot Doc

rrApprentice

Plm Bch Grdns, Fl USA

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They run on the smoke...when you let the smoke out, they stop running ...good luck figuring it out
Andy

Inverted IS more fun!

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06-16-2015 12:43 AM  3 years agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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Yes, in some instances, the bolts used to secure the motor to its mount have been too long, and when tightened, pierced the motor windings.
Someone mentioned a short caused by a bad solder joint in the Talon 90 ...a problem believed to exist with those???
That was a recent post, from someone whose motor AND ESC went up in smoke. The cause is not actually known.

You have a Talon 90.

What exactly are the settings that are currently programmed into the unit?

What motor were you using.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-16-2015 03:24 AM  3 years agoPost 8
rexxigpilot

rrProfessor

Florida

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Zyban and Chantix will make it stop smoking J/K

Perhaps try adjusting the frequency of your Talon ESC. Higher will decrease motor temp while it increases ESC temps. Lower frequency works the opposite.

Seems like your stator winding has a short. Check continuity/resistance with a meter.

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06-16-2015 01:32 PM  3 years agoPost 9
tgreen

rrNovice

Western Pennsylvania

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The motor was the stock ThunderTiger OBL 44/1150KV motor and a Talon 90 ESC. I'll double check the hardware holding the motor to the mount. I do remember they seemed a bit long. I programmed the ESC with the Castle Link. The settings pretty much matched a friends program who is flying the exact same machine with the same motor/esc.

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06-17-2015 01:07 AM  3 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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[/quote] The settings pretty much matched a friends program who is flying the exact same machine with the same motor/esc.[/quote]

And you're certain your friend has his set up properly? If you can tell us how it was programmed, we may be able to help you further.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-17-2015 04:38 AM  3 years agoPost 11
EEngineer

rrProfessor

TX

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they seemed a bit long.
Recommend checking this mechanical issue first.

Measure the distance to determine the depth of the winding in the motor as you spin it thru 360 degs.

And then ensure that your motor mount bolts are shorter.

Your motor mount bolts don't need to extend beyond the threads in the motor....keep in mind there's vertical play in the motor shaft...within tolerances.

Don't skimp on properly sizing the motor mount bolt length...what's "laying around" might not "cut it".

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06-17-2015 01:39 PM  3 years agoPost 12
tgreen

rrNovice

Western Pennsylvania

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My friends machine has been flying fine with no problems. We both purchased them from Tower last year when the complete ARF kit was around $550. It seemed like a pretty good deal for a complete 500 carbon frame machine with a metal head, less battery. They both came 90% assembled with the same motor/ESC. Our programs via castle link match. I decided to order a scorpion motor and a different Talon ESC. I'll install both making sure that the motor mounting bolts are the correct length. Then I plan to return the Talon 90 to Castle for them to check. Thanks to all for your ideas and help! Great forum/resource!

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