Micro Blade nano cpx shunt down suddenly
Tony
Staff member
FET is a Field-effect transistor. It regulates the power to the motors. And what I meant by sweat is look at them closely and see if they look wet or if you can see a crack in them. If you can see either, they are bad. It will look something like the image below, very small and soldered to the main board.
Also, check and make sure your batteries are at a full charge and stay at a full charge.
Also, check and make sure your batteries are at a full charge and stay at a full charge.
Slobberdog
Well-Known Member
They also do brushless conversion now from blade
krayon
Member
Hi,
Yes maybe i must change the motor but i've changed them 1 week ago... Is it so fragile ???
And what do you think about this "spot" (marked in red)... i have clean up them with benzine and it go away... Is it possible that this spot (i've clean up 2 spots) make a "shortcut" ???
And what do you think about this mark (in yellow rectangle)... is it normally ???
Thx
Regards Krayon
Yes maybe i must change the motor but i've changed them 1 week ago... Is it so fragile ???
And what do you think about this "spot" (marked in red)... i have clean up them with benzine and it go away... Is it possible that this spot (i've clean up 2 spots) make a "shortcut" ???
And what do you think about this mark (in yellow rectangle)... is it normally ???
Thx
Regards Krayon
If you bought it new, give HH a call and see if they'll replace it for you. If you bought it used, you'll probably have to buy a replacement on your own.
How many flights are on it. The brushed motors on these can go bad over time, possibly resulting in a short or very high currentdraw. That may be overloading the board and causing it to come down. Just a possibility. I've heard reports of people only getting 10-20 flights out of these, but I think my motor started to go after 50-75 flights. I was mostly hovering and doing some slow maneuvering around my house with only occasional outdoor sport flying and some tumbles and rolls. I crashed a lot though as it was my "learning" heli from Jan-Mar of 2013. So that is probably what really did in the motor and eventually the board too.
Tail motor is also brushed and they spin much faster so tend to die more quickly. 25-50 flights it probably all you'll get out of one.
Motors are cheap compared to boards, so I'd try replacing them first. IF it still happens then replace the board. Work through HH warranty if possible.
How many flights are on it. The brushed motors on these can go bad over time, possibly resulting in a short or very high currentdraw. That may be overloading the board and causing it to come down. Just a possibility. I've heard reports of people only getting 10-20 flights out of these, but I think my motor started to go after 50-75 flights. I was mostly hovering and doing some slow maneuvering around my house with only occasional outdoor sport flying and some tumbles and rolls. I crashed a lot though as it was my "learning" heli from Jan-Mar of 2013. So that is probably what really did in the motor and eventually the board too.
Tail motor is also brushed and they spin much faster so tend to die more quickly. 25-50 flights it probably all you'll get out of one.
Motors are cheap compared to boards, so I'd try replacing them first. IF it still happens then replace the board. Work through HH warranty if possible.
Tony
Staff member
The one in red looks like paint, the one in yellow looks like paper. If you have cleaned them up, adn see no other damage, and you have replaced the motor, then I'm almost out of ideas. The only thing that I can think of is that the board has went out on that bird. As for the motor, they can last anywhere between 15 flights and 200 flights, it just depends on what day of the week it was made.
Sorry, just posted and there were others that did too while I was typing. 
Red circle is nothing to worry about. Probably some resin they didn't get cleaned totally off. Yellow, no issue. Many companies will scratch chip identifying marks off in order to slow down the cloners and hackers, and also so they know which ones have been flashed with programming before assembly and which have not.
If you just replaced the main motor, what about the tail motor?
Chances are it is not the main motor if you just replaced it in the last week, unless you crashed it and left the throttle up while it sat stalled or something like that.
Red circle is nothing to worry about. Probably some resin they didn't get cleaned totally off. Yellow, no issue. Many companies will scratch chip identifying marks off in order to slow down the cloners and hackers, and also so they know which ones have been flashed with programming before assembly and which have not.
If you just replaced the main motor, what about the tail motor?
Chances are it is not the main motor if you just replaced it in the last week, unless you crashed it and left the throttle up while it sat stalled or something like that.
krayon
Member
Thanks for all this advices.
I will assembly thé nano again and test it... Maybe with the clening te nano will run correctly. If not, i will buy à motor (the least !)... WC will see... But i think that is impossible to obtain anythink from HH support (garantee).
Thx à lot.
Regards.
Krayon
- - - Updated - - -
Hi,
The tail motor work perfectly...
Sorry but i don't umderstand what do you mean with "unless you crashed it and left the throttle up while it sat stalled or something like that." Sorry i don't speak very well english... Can you explain me that differently ?)
Regards.
Krayon
I will assembly thé nano again and test it... Maybe with the clening te nano will run correctly. If not, i will buy à motor (the least !)... WC will see... But i think that is impossible to obtain anythink from HH support (garantee).
Thx à lot.
Regards.
Krayon
- - - Updated - - -
Hi,
The tail motor work perfectly...
Sorry but i don't umderstand what do you mean with "unless you crashed it and left the throttle up while it sat stalled or something like that." Sorry i don't speak very well english... Can you explain me that differently ?
) Regards.
Krayon
If you crash it and forget to hit throttle hold on the transmitter, or lower the throttle stick, meaning the rotor blades are stuck but you're still telling it to run the motor. If you leave it in that condition for too long it can cause the motor to be damaged or the speed control circuit on the board to get overheated and damaged.
Don't worry about it. Sounds like you have a plan. Good luck!
I don't know about horizon hobby support in Switzerland, but here in the US it is pretty good. Among the best in the industry perhaps. You have to wait on hold for a while, but once you get through they are usually pretty helpful and they honor their warranty very well, often offering replacements parts with no need to send the model in for service.
Don't worry about it. Sounds like you have a plan. Good luck!
I don't know about horizon hobby support in Switzerland, but here in the US it is pretty good. Among the best in the industry perhaps. You have to wait on hold for a while, but once you get through they are usually pretty helpful and they honor their warranty very well, often offering replacements parts with no need to send the model in for service.
EyeStation
Well-Known Member
I'm wondering if the lower FET in this picture has physical "Bumps" where I see small circles?
I see two dots between the left side and the center terminal.
Drag your finger nail across the surface to see if these are small "Blisters" in the semiconductor package. Should be smooth for the most part, but no bumps at all.
I see two dots between the left side and the center terminal.
Drag your finger nail across the surface to see if these are small "Blisters" in the semiconductor package. Should be smooth for the most part, but no bumps at all.