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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsFutaba CGY › Warning! About magnet governor on
02-08-2016 02:44 AM  33 months agoPost 1
Biomac

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Beijing,China

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I have my E360 crasched twice in last ten test flights.
Now I suppose that caused by using a neodymium magnet.
Next month I will try ferrite magnet on my E360.

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02-08-2016 02:49 AM  33 months agoPost 2
JEEPWORLD2002/2

rrKey Veteran

Blue Bell, Pa

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Huh don't get it. E360 el why use a magnet ?? Pluse read the rpm ?? Or are u referring to static n a ferrite bead on a esc lead ?? U got my lost

Edit there are any where from 8 to 16 neo magnets in the brushless mtr housing so I m thinking a magnet will not be the issue ? Static cone from belt m in ur neck of the wood I would be verry doubtful a static issue in ur humid climate. ? Care to give us more information like issue such as a brown out. Esc cut off ?? No response for tx ? Data loss ?? Range ?? Tx system Rx fBL esc

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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02-08-2016 03:20 AM  33 months agoPost 3
Biomac

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Beijing,China

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CGY support magnet sensor governor or EP heli. And I can't understand how an ESC know motor speed. Because heli's ESC don't like racing car's ESC. I want to try this on my EP heli. Then I decide try this on my E360 first. After few flight one of magnet came with CGY has lost. So I have to buy some other magnet. Maybe new magnet has larger size 6*4 and more magnet. Then this may influence CGY.
Yesterday I feel I lost collective pitch. Today I lost collective and cyclic pitch.
Yesterday I have eight flights. Today I just have two flights.
I can cut power before this two crash. My ESC work well. ESC connect to CGY. There is only one sbus signal line on my R6203SB.
Before I just did hover. The distance must be in 20m.

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02-08-2016 03:58 AM  33 months agoPost 4
don s

rrElite Veteran

Chesapeake, VA

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Pretty sure that the "speed controller" knows the motor speed.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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02-08-2016 04:12 AM  33 months agoPost 5
Biomac

rrNovice

Beijing,China

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But how the ESC know the exactly speed?
or CGY's governor and ESC's governor witch one is better?Compare with hobby wing and kontronik.

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02-08-2016 12:43 PM  33 months agoPost 6
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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But how the ESC know the exactly speed?
The brushless motor is like a stepper motor. (actually like a 3 phase motor). For each pulse of the ESC driver the motor shaft rotates a fixed amount (how far depends also on the number of poles in the motor). It takes a fixed amount of pulses for each revolution of the motor shaft. The ESC generates the pulses so it "knows" the speed.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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02-08-2016 10:47 PM  33 months agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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The type of magnet isn't your problem.

Sounds to me as if your power source isn't adequate.

-----
Dave

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

Team Heliproz

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02-08-2016 11:15 PM  33 months agoPost 8
Biomac

rrNovice

Beijing,China

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Thanks Gyrofreak!

Dkshema, you mean my bec not enough for my 450?
Hobbywing 50V3 output 6V. Futaba s3156*3. Futaba bls257 for tail.

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02-11-2016 05:29 AM  33 months agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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You never stated what ESC you were using...till asked.

-----
Dave

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

Team Heliproz

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02-11-2016 05:41 AM  33 months agoPost 10
Biomac

rrNovice

Beijing,China

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Dkshema
Sorry, my fault.
So now what do you think?
The origin one size is 4*2. Now I use 6*4.

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02-18-2016 08:32 AM  33 months agoPost 11
Biomac

rrNovice

Beijing,China

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Update
Today I got new neodymium magnet(N40M 3*2).

New problem found. One of my swash servo(Futaba S3156) doesn't work sometime. So my crash is cause by this servo ,but not too much magnet field. Because if it caused by too much magnet field, my CGY won't work at first flight. In fact my first crash is the last flight that day, then second crash is at second flight after repaired.

I decide replace all my swash servos. These servos worked over 1.5 year. In average one day one flight, each flight about 5 min.

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