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« on: January 03, 2014, 07:31:21 PM »
rcrcnitesh
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My friend is having a problem with his motor which is http://rcbazaar.com/products/1999-avionic-c2836-kv1120-brushless-motor.aspx
It tends to vibrate like hell when he runs it. When he Saw inside the motor he found that the coils where a little melted from beginning when he bought it.
Can I know how to repare it can it get repaired at the local motor rewinding shop.

Rcbazaar could you please replace the motor for him if it is not getting repaired.
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« Reply #1 on: January 03, 2014, 07:47:27 PM »
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Information sharing improves knowledge of both.
In description of RCBazaar, it is written as 1120 rpm instead KV.
However, can we see the fault picture ? you can easily rewind this motor, just search this forum.
External link
http://www.rcgroups.com/forums/showthread.php?t=1269270&page=2

Thanks
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« Reply #2 on: January 03, 2014, 07:57:12 PM »
rcrcnitesh
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I asked him to send me the pic he hasn't till now.
BTW can we get it rewound somewhere else there is a motor rewinding shop near my house.
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« Reply #3 on: January 10, 2014, 04:34:04 PM »
rcrcnitesh
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What sort of wire should we use can you tell us and how many turns are there on this motor.
and could you please tell us the number of poles on the motor and some diagrams for rewinding an motor.
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« Reply #4 on: January 12, 2014, 12:45:11 PM »
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did you email rcb with your problem?
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« Reply #5 on: January 12, 2014, 12:55:04 PM »
rcrcnitesh
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No I didn't but it seems he called them.
Don't know what reply did he get.
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« Reply #6 on: January 28, 2014, 01:47:58 PM »
rcrcnitesh
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Pics
I have the motor for rewinding.
What tools would i need and the gauge of the wire. Also how do i open it.
CAM00232.jpg
Re: Problem with Avionics motor.
* CAM00232.jpg (45.68 KB, 600x800 - viewed 1055 times.)
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« Reply #7 on: January 28, 2014, 01:49:27 PM »
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...
CAM00231.jpg
Re: Problem with Avionics motor.
* CAM00231.jpg (46.6 KB, 600x800 - viewed 1032 times.)
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« Reply #8 on: January 28, 2014, 01:51:10 PM »
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Don't wake a Tiger until you've factored the teeth
Open the grub screw with a 1.5 mm Allen Key, and the circlip with a circlip pliers

For the wire gauge, if you have to ask this question do not attempt to rewind yourself

If getting it done by a professional, he will know
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« Reply #9 on: January 28, 2014, 01:52:50 PM »
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Don't wake a Tiger until you've factored the teeth
Quote from: rcrcnitesh on January 28, 2014, 01:49:27 PM
...

What is the meaning of this post? About 88 seconds after your previous one? I think you should be chargd a monthly sum for storage and bandwidth
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« Reply #10 on: January 28, 2014, 01:54:56 PM »
rcrcnitesh
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It is 12 pole
CAM00233.jpg
Re: Problem with Avionics motor.
* CAM00233.jpg (43.87 KB, 600x800 - viewed 966 times.)
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« Reply #11 on: January 28, 2014, 10:24:04 PM »
rcrcnitesh
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Can anyone help me how to disassemble the motor.
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« Reply #12 on: January 29, 2014, 01:28:46 PM »
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Quote from: rcrcnitesh on January 28, 2014, 03:23:56 PM
Btw sir can you post a video in which they show how to remove the can and all the parts in that thread.

Till removing can from Stator part

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« Reply #13 on: January 29, 2014, 01:49:45 PM »
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Thanks for the video how aboiut this part how to remove it.
CAM00241.jpg
Re: Problem with Avionics motor.
* CAM00241.jpg (60.39 KB, 600x800 - viewed 969 times.)
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« Reply #14 on: January 29, 2014, 02:06:36 PM »
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Use appropriate size Allen key to remove the grub screw and then remove the part
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« Reply #15 on: January 29, 2014, 02:09:53 PM »
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When inverted, down is up, and up is expensive…
Nitesh

Instead of asking how to remove this that.Spend some money on special tools,soldering,tweezers and knife.

In DIY you need lots of special tool.I have got even mini driller to make larger hole on servo arms for hinge.
IMG_0222.jpg
Re: Problem with Avionics motor.
* IMG_0222.jpg (94.27 KB, 800x600 - viewed 949 times.)
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« Reply #16 on: January 29, 2014, 02:10:33 PM »
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Ok sir
Was thinking about it as when i saw it looked like a hex from the inside.
I have soldering iron, allen keys, drills, screw driver set, drills from 10mm to 20mm size, angle grinders, die grinders and many more.
All my fathers except the soldering iron i can use them any time.
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« Reply #17 on: January 29, 2014, 02:25:27 PM »
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When inverted, down is up, and up is expensive…
In that case ask your father to help it out and solve the problem.
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« Reply #18 on: January 29, 2014, 02:28:58 PM »
rcrcnitesh
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I want to do it myself as i like to do things by myself.
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« Reply #19 on: January 29, 2014, 02:34:16 PM »
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When inverted, down is up, and up is expensive…
Appreciate your policy reason for suggest on your dad help.

we always love to do experiment in others stuff than ours.So end of the day any issues happen then you have to answer to your friend.
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« Reply #20 on: January 29, 2014, 02:44:54 PM »
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Actually my freind gave me this motor to keep it with myself. He is going to buy a new one.
How do i remove the c clip as what i saw in youtube people are using some proffesional tool for that any indian jugaad i tried but cant open it with anything
« Last Edit: January 29, 2014, 02:58:34 PM by rcrcnitesh » Logged
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« Reply #21 on: January 29, 2014, 02:58:45 PM »
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When inverted, down is up, and up is expensive…
WOW thats cool then play it.Hate your friend gave you vibrate motor  Angry

To remove the c clip you need a connector check in two wheeler mechanic shop.these type of clips comes in carburetor needle and disk brake master cylinder.
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« Reply #22 on: January 29, 2014, 02:59:54 PM »
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No not at all
I am happy i got something to learn.
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« Reply #23 on: January 29, 2014, 03:39:02 PM »
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 What sort of connector
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« Reply #24 on: January 29, 2014, 04:27:32 PM »
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I am not putting much force do i need to do it or slight force is enough.
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« Reply #25 on: January 29, 2014, 08:04:22 PM »
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Update got the c clip removed by an rewinding shop owner.
Cant find from where to start unwinding.
CAM00248.jpg
Re: Problem with Avionics motor.
* CAM00248.jpg (25.62 KB, 800x600 - viewed 541 times.)
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« Reply #26 on: January 29, 2014, 08:08:56 PM »
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More pics
Its 12 pole 14 magnets.
How to unwind cant starting point of the wire.
CAM00246.jpg
Re: Problem with Avionics motor.
* CAM00246.jpg (38.44 KB, 800x600 - viewed 562 times.)
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« Reply #27 on: February 01, 2014, 03:00:40 PM »
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Actually now the problem is I can't remove the wires from the stator only one tooth and from another a tooth only one wind everything is stuck and the windings can't be removed.
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« Reply #28 on: February 01, 2014, 05:48:10 PM »
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Nitesh, Instead of asking so many questions, Search a little bit .

Go to this thread, you will get your max questions answered.

http://www.rcindia.org/electric-power/can-this-bldc-motor-be-repaired/
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« Reply #29 on: February 01, 2014, 07:57:05 PM »
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I read the whole thread already.
Can i cut the wires.
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« Reply #30 on: February 02, 2014, 09:25:12 AM »
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dear nitesh.... first check if winding need to be redone??

as per pic they seems to be OK.... what is wrong in winding?
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« Reply #31 on: February 02, 2014, 10:34:16 AM »
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Actually it is melt.
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« Reply #32 on: February 02, 2014, 11:27:14 AM »
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When inverted, down is up, and up is expensive…
Have you got the exact coil?
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« Reply #33 on: February 02, 2014, 12:45:47 PM »
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Didnt get you
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« Reply #34 on: February 02, 2014, 12:59:32 PM »
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ok if its melted .... search on google with rewinding the brushless motor .. u will find relevant info.....
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« Reply #35 on: February 02, 2014, 01:14:59 PM »
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Have seen multiple videos and threads. My motor is a dlrk wind.
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« Reply #36 on: February 10, 2014, 02:23:47 PM »
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Dear sir the above motor u'd specified would provide the thrust mentioned at the rcbazaar site when we use the given combinations or its just hypothetical data.....do we get this thrust at 100% throttle or at 50-60% throttle only
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« Reply #37 on: February 11, 2014, 04:15:32 PM »
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The thrusts typically mentioned in motor specs would be at WOT with the given prop and input voltage. To measure actual static thrust, the scale test is a simple way of doing it. This is where the plane is tied to a spring loaded kitchen weighing scale, and see how much the plane can displace the scale.
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« Reply #38 on: February 11, 2014, 06:14:47 PM »
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DEAR sir thanx for ur reply but plzz try to xplain again about the scale test and if there is any theoretical calculations with which we can get an idea if thrust produced by motor at given voltage and prop size
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« Reply #39 on: February 11, 2014, 06:18:55 PM »
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Also sir in the rc bazzar site i observe that the combination provided by the companies especially avionics motor was very much hypothetical for eg in one of the motor C3536/1900kv they are promising thrust of 1200gm with 3s and 9*4.7 props with esc of just 30 amps when at load condition motor ddraws around 37.33 amps .......so how can i thrust there data and buy a product.....try to xpalin sir
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« Reply #40 on: February 11, 2014, 06:34:13 PM »
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Theoretical ? Something like this ?

http://www.rcindia.org/electric-power/how-to-calculate-the-thrust/ (see link in reply #1).

Basically you have to do a bit of searching.

Also, when you talk about a product, please post a link here, so that we all can verify what you are saying, and point out anything that you may have overlooked.

And you are right, some of the ESC choices listed seem wrong.  For example, for this motor below, there are multiple combinations where the peak current at load is higher than the ESC rating, and this is not a good thing.

http://rcbazaar.com/products/1908-avionic-c3536-kv1100-brushless-motor.aspx
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« Reply #41 on: March 26, 2017, 02:08:24 PM »
rcrcnitesh
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Hello guys,
A small update with the rewind of this motor.
I want cleaning my room when I stumbled upon this long forgotten piece of metal, I decided to make some use of it. I've been able to remove the stator with the windings. But the thing is I am not able to find the bearings and the c clip for this motor. Anyone knows where can I find it?
https://uploads.tapatalk-cdn.com/20170326/3490d354d3be25ba870d46c21f80b707.jpg
Problem with Avionics motor.

https://uploads.tapatalk-cdn.com/20170326/82cc936d9e17504ac83977e6634669de.jpg
Problem with Avionics motor.
https://uploads.tapatalk-cdn.com/20170326/f0c1ea4d3fc77a38c45c2038bb099d85.jpg
Problem with Avionics motor.


Sent from my MotoG3-TE using Tapatalk
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« Reply #42 on: March 26, 2017, 02:17:54 PM »
rcrcnitesh
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There is another problem. While removing the windings I was getting frustrated and I caused some damage to the stator removing some of it's insulation and also a strand of two of us poles has come out.
https://uploads.tapatalk-cdn.com/20170326/97fe7367fd9ef068e5efb10e7f944ed5.jpg
Problem with Avionics motor.

https://uploads.tapatalk-cdn.com/20170326/dc0179d186f1ed4639bfe443503d73f0.jpg
Problem with Avionics motor.


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« Reply #43 on: March 26, 2017, 02:18:05 PM »
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U can find c clip at computer processor fan which is while plastic . And they work very well
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« Reply #44 on: March 26, 2017, 02:19:38 PM »
rcrcnitesh
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Re:
A computer processor fan. Hmmm. Will it fit? I'll surely try it.

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« Reply #45 on: March 26, 2017, 02:22:31 PM »
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U can use very small quantity of araldite for better insulation. Please check with DMM continuity tester and check with stator and coil.
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« Reply #46 on: March 26, 2017, 02:27:23 PM »
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Definitely processor fan is 3mm shaft. Just try it
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« Reply #47 on: March 26, 2017, 02:30:43 PM »
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Another way to use you motor is you have change motor shafts position. Since it is backward, u can use it with forward shaft in pusher configuration without c clip.
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« Reply #48 on: March 26, 2017, 03:09:59 PM »
rcrcnitesh
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Re:
Thank you so much. I'll try the c clip from CPU fan. Now what should I do about the bearings and the grub screw? Also insulating with epoxy? How? Any videos or articles?

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« Reply #49 on: March 26, 2017, 07:32:43 PM »
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Please mention what happens to bearing and grub screw? And insulation? Any pic
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« Reply #50 on: March 26, 2017, 08:27:49 PM »
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Re:
@tictoc21 The bearings and the grub screw are both missing. I am not able to find them. Do you have any videos on how to insulate the stator.

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« Reply #51 on: March 26, 2017, 10:10:29 PM »
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Better to buy them. U can put epoxy where insulation is not. Sorry no video. But I tried once. Please check the stator and coil continuity before running motor.
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« Reply #52 on: March 27, 2017, 10:31:06 AM »
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Re:
Thank you so much. I am thinking you too much but do you have any idea where I can get bearings and the grub screw? RCB is out of stock.

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RC India  RC Equipments  Electric Power  Topic: Problem with Avionics motor.
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