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02-08-2008 04:15 PM  10 years agoPost 1
billcoltharp

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Austin,TX

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After an uneventful evening flight in the cul-de-sac I notice that the main shaft on my Belt CP appears bent (the hub at the top wobbles). When I tried to run the rotors up to check this, the motor would not start. It initializes (beeps) but when the throttle is advanced, the motor makes a few jerky quarter turns and then stops. I am assuming this means my ESC is fried? How do I diagnose the ESC? What should I replace it with?

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02-08-2008 04:18 PM  10 years agoPost 2
Jerry In Maine

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"Downeast" Maine

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It's not binding is it? Can you turn the blades freely in both directions? In the forward direction does turning the blades cause the motor to turn?

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02-08-2008 04:37 PM  10 years agoPost 3
Sgt Heli

rrVeteran

Remlap, Al USA

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If its an Esky esc try resetting it. IIRC, with the radios throttle all the way up plug in the esc. After it beeps and thinks it over for a few then unplug it, return throttle to 0 and replug it. You may have the brake on.

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02-08-2008 04:45 PM  10 years agoPost 4
billcoltharp

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Austin,TX

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Belt CP won't run
The motor is turning freely as are the main gears, belt, etc.

I will try resetting the esc. Good thought! Thanks!

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02-08-2008 09:19 PM  10 years agoPost 5
billcoltharp

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Austin,TX

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I tried resetting the ESC with no luck. Any other thoughts?

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02-08-2008 09:37 PM  10 years agoPost 6
tmaxx26power

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South Dakota

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Have you tried plugging a servo into the throttle channel of the receiver to make sure all is ok with the radio-receiver? i would say it probably is since your getting beeps but it doesn't hurt to see if a servo works normally in that slot.

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02-08-2008 09:39 PM  10 years agoPost 7
tutelar-rc

rrKey Veteran

Nobleton, Ontario - Canada

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One of your wires does not have a good connection from the ESC to the motor. (May be intermittent)

With only 2 wires plugged into a BL motor, you will get the initialization beeps, and exactly the condition you are describing.

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02-08-2008 09:40 PM  10 years agoPost 8
tmaxx26power

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South Dakota

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tutelar has a great idea there

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02-08-2008 10:53 PM  10 years agoPost 9
toolman18

rrElite Veteran

Portland Tx

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Check this
That happened to me once. I jiggled the wires at the motor and it began working as normal. It looked to me like the wires were grounding out in the motor. You will have to look and see.
Brad

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02-09-2008 02:56 PM  10 years agoPost 10
billcoltharp

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Austin,TX

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I tried jiggling and re-connecting the wires to the motor with no success.

Does anyone know what the three wires to the motor (red,blue,black) are?

Can the signal from the ESC to the motor be diagnosed?

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02-09-2008 04:02 PM  10 years agoPost 11
tutelar-rc

rrKey Veteran

Nobleton, Ontario - Canada

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If you are thinking along the lines of +ve, -ve, signal, a BL motor does not work that way. Each wire has a common purpose, and the ESC manages the power to each to drive the motor. I think you would need more than a simple multi-meter to diagnose the problems with the ESC power signals.

For a better explanation, go here [http://en.wikipedia.org/wiki/Brushless_motor]

Best bet is to get with a friend or LHS to diagnose the problem by swapping out components. Based on the checks you have done so far, it is likely a bad ESC, but it could be just a wire...

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02-10-2008 03:22 AM  10 years agoPost 12
stcyr

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Laurel, MD

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The best and sometimes the only way to find the defective part is to have replacements. Change the easiest first which would be the battery. The only failure I've had similar to your problem was a bad cell in the pack I was using. Unless the motor was poorly assembled, it isn't likely to fail under normal use. You can also check the signal from the receiver to the ESC.

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02-20-2008 03:35 AM  10 years agoPost 13
billcoltharp

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Austin,TX

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Problem Solved! It was the ESC. Got a new one and installed it, all is well. I also had a bent main shaft so I must have stuck the rotors in the asphalt hard enough to to the damage although I don't recall doing it.

I got the parts from "John Hobbies". It took about a week for them to come from Hong Kong.

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02-21-2008 02:34 AM  10 years agoPost 14
billcoltharp

rrNovice

Austin,TX

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It looks like Toolman18 was right. I tried to fly this aft. and the problem came back with the new ESC. I "jiggled wires" and found a bad solder joint on the male (motor) side of the blue wire to the motor. I re-soldered the connector and the motor now runs.

I will flight test tomorrow. Thanks to all for their advice.

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02-21-2008 03:29 AM  10 years agoPost 15
toolman18

rrElite Veteran

Portland Tx

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Thanks
Lucky guess. Congrats on finding the problem.
Brad

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02-21-2008 05:52 AM  10 years agoPost 16
eddwill

rrNovice

Reno, NV

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Same problem
Hello, I am a new member. This post is what led me to runryder. I purchased a belt cp on ebay 3 weeks ago charged and installed the battery, plugged in esc initialize beeps OK, throttled up but the motor just moved 1/4 turns back and forth. I checked the connections and then it was fine for 2 1/2 batteries. Then it started again. Traced it down to the esc by swapping with my friends Walkera esc. The ebay seller supplied me with a 30a Haoye esc (is anybody familiar with the haoye esc? is it programmable??)works fine in my belt cp. It seems there are many issues with the esky esc.

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