Hello

i would like to ask if that motor is normal like that or there is something wrong ?



because here there is the first visive defect: https://i.imgur.com/Eo2nhMb.png ....the colours is different, it looks like a magnet is missing...

while here an immense piece is missing or at least looks like that : https://i.imgur.com/iTQREoa.png (the colour is different from the picture above);

in first days i have noticed that one was missing but i didn't have give lot attenction to that detail, but now i noticed some vibration during the flight, the drone file well overall but i have noticed vibration when you go slow or overing

while all other 3 engines looks like that:


so normal, i don't know what to say, does some one have some advice or experience about that ?

It’s really hard to tell from that video if magnets are actually missing or if it’s just glue or gunk. Is that discolored area an open gap? If so, you somehow lost some magnets and need to replace the motor or at least the bell.

If it’s not an open gap, then it’s either gunk or glue- if it’s glue, you’re fine, if it’s gunk, gently clean it off, and double check that your motor screws are tight and that the motor spins smoothly.

(16-Apr-2022, 09:23 PM)Lemonyleprosy Wrote: It’s really hard to tell from that video if magnets are actually missing or if it’s just glue or gunk. Is that discolored area an open gap? If so, you somehow lost some magnets and need to replace the motor or at least the bell.

If it’s not an open gap, then it’s either gunk or glue- if it’s glue, you’re fine, if it’s gunk, gently clean it off, and double check that your motor screws are tight and that the motor spins smoothly.

Hello

No don't looks like there are gaps, but is sstrange because here on the perfect motors the magnets are gray rectangles and are all there as on the big drones motors.
https://i.imgur.com/jH6bihV.jpg

While here on this other motor, even if there is not a gap looks like there is a single big magnet
https://i.imgur.com/iTQREoa.png

And that is just a simulation the fact that there are several magnet...

Is a bit strange

Hi Rosssiiii,

As best that I can tell, that looks like a grey adhesive material...sort of like JB Weld.
It is hard to say what it really is. If it is a metal that effects the magnetism, then it
might be affecting the motor, otherwise, I don't think it will matter.

Whether or not this contributes to instability at slower speed, I have NO idea.

I haven't flown my Meteor65s for quite a while, so I have nothing to compare
your quad's behavior to. Sorry.

(17-Apr-2022, 06:07 PM)iFly4rotors Wrote: Hi Rosssiiii,

As best that I can tell, that looks like a grey adhesive material...sort of like JB Weld.
It is hard to say what it really is. If it is a metal that effects the magnetism, then it
might be affecting the motor, otherwise, I don't think it will matter.

Whether or not this contributes to instability at slower speed, I have NO idea.

I haven't flown my Meteor65s for quite a while, so I have nothing to compare
your quad's behavior to. Sorry.

Hello

No that is not a piece of metal that is been added to the motors but looks strange because only that motor have that difference...there should be many magnets and looks like there is just a big magnets...there is not space anyway

(17-Apr-2022, 06:07 PM)iFly4rotors Wrote: Hi Rosssiiii,

As best that I can tell, that looks like a grey adhesive material...sort of like JB Weld.
It is hard to say what it really is. If it is a metal that effects the magnetism, then it
might be affecting the motor, otherwise, I don't think it will matter.

Whether or not this contributes to instability at slower speed, I have NO idea.

I haven't flown my Meteor65s for quite a while, so I have nothing to compare
your quad's behavior to. Sorry.

Hello again

Look here is normal, https://i.imgur.com/hLA9z2y.png
visible there are 4 magnets ... while here https://i.imgur.com/GNjtHGy.png is not possible see these 4 magnets, above they are not covered by anything but simply is not possible see these 4 separete magnets !

but there is no emptiness

Oh now they have replied from the BetaFPV and they said:

Quote:Hi sir,
 
This is used to keep the motor rotor balanced and will not affect the use.
 
Thanks

@SnowLeopard
@iFly4rotors

But if it should keep the engine balanced, it should stay there right ?

i have noticed some low rpm vibration

now i have took a better picture:
https://i.imgur.com/OzcTfHe.jpg (here are missing)

here there are and is regular:
https://i.imgur.com/m9mv4te.jpg

That all looks perfectly fine to me, and it's normal.

They only put (counter) balancing gunk in places on a motor that need it. The material and magnets in a motor bell are not all identical. Slight differences in density of the metal or slight differences in the placement of a magnet will affect the balance of each individual motor. So not all motors will have balancing gunk in the same place.

It's exactly the same as the (counter) balancing weights they put on your car wheels after you have new tyres fitted. They are added to iron out (cancel out) any vibrations during rotation because the density of a wheel rim and/or the tyre fitted to it isn't the same across the entire cross section of it's structure.

+1   I agree with Snow.

Personally, as long as it flies ok, I would NOT even worry about it.

(18-Apr-2022, 12:20 PM)SnowLeopardFPV Wrote: That all looks perfectly fine to me, and it's normal.

They only put (counter) balancing gunk in places on a motor that need it. The material and magnets in a motor bell are not all identical. Slight differences in density of the metal or slight differences in the placement of a magnet will affect the balance of each individual motor. So not all motors will have balancing gunk in the same place.

It's exactly the same as the (counter) balancing weights they put on your car wheels after you have new tyres fitted. They are added to iron out (cancel out) any vibrations during rotation because the density of a wheel rim and/or the tyre fitted to it isn't the same across the entire cross section of it's structure.

Ok, but I have noticed that in a first moment was just one missing...now i see that many of them are missing so I made some questions about that ...I have noticed some vibration more, don't why compared to first flights.
Saturday when I have tried there was not huge wind.

Hi Rosssiiii,

Well, if those are balancing weights and some come off, then it would, in fact,
unbalance the motor which could introduce vibrations. However, I don't see
any effective method to rebalance the motors without some type of special
balancing apparatus. 

So...what do you do    

Since I have no method to balance motor bells, I would have 3 options:

1) live with it.
2) see if you can find a bell and replace it.
3) replace the whole motor.



 

(18-Apr-2022, 02:53 PM)iFly4rotors Wrote: Hi Rosssiiii,

Well, if those are balancing weights and some come off, then it would, in fact,
unbalance the motor which could introduce vibrations. However, I don't see
any effective method to rebalance the motors without some type of special
balancing apparatus. 

So...what do you do    

Since I have no method to balance motor bells, I would have 3 options:

1) live with it.
2) see if you can find a bell and replace it.
3) replace the whole motor.



 

ask to betafpv to send me a new motor because i didn't have crashed it 

motors of tiny whoop are also very expensive right ?

0802s can range from $10 -15 depending on KV.. shipping will vary… so I usually order more than just 1..

(20-Apr-2022, 09:21 PM)Rob Axel Wrote: 0802s can range from $10 -15 depending on KV.. shipping will vary… so I usually order more than just 1..

but how is possible that a such small engine costa as a big one 

Actually, sometimes the larger ones are cheaper. You know, the motors are all
built the same way. The only difference would be the cost of the raw material.
In fact, there may be more difference in producing some part of the motor
than there is in the material costs.