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« on: May 30, 2011, 10:53:04 PM »
Swapnil
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I recently acquired this 2212. It had jumped off its mount. I opened it i.e seperated the bell and armature to find the wires badly damaged. Can it be dismantled further to attach new wires? 

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Can this BLDC motor be repaired?
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« Reply #1 on: May 30, 2011, 11:40:35 PM »
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Sundaramvelar is one person who can help you on this. Shoot him a PM and request him for his help. All the best!
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« Reply #2 on: May 31, 2011, 12:49:36 AM »
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I recently acquired this 2212. It had jumped off its mount. I opened it i.e seperated the bell and armature to find the wires badly damaged. Can it be dismantled further to attach new wires? 

i also have the same problem on one of my 2212/13 motor
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« Reply #3 on: May 31, 2011, 01:03:52 AM »
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sure you can
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« Reply #4 on: May 31, 2011, 07:15:39 AM »
Swapnil
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sure you can
Well, I couldn't open it any further.  Bang Head
Even if I had, I might not have been able to fix those (shattered) insulated wires. Sad
Gonna have to buy a new one...
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« Reply #5 on: May 31, 2011, 11:48:05 AM »
sundaram
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Don't loose heart and loose the fight so soon Swapnil my friend, Many in the forum like me, to name some like Ashta sir, Roopesh, Kalyan (maybe), rotorzone are happily rewinding and using old burnt out brushless motors. will be glad to of help.  I have not thrown out a single Brushless or Brushed motor I have bought till date. I have rewinded and revived all of them and using happily till date.

to begin with let me give you copy of powerpoint presentation which I got hold of some time back on the net, on basics of Brushless Motor and their rewinding technique. PM me your email ID.

Note for Admin : I am not sure of the copyright status on posting slide photo shots of the presentation for benefit of all. Please clarify
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« Reply #6 on: May 31, 2011, 12:41:47 PM »
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Egerly waiting for the PPT. Also would like to know the tools required

regards
Pankaj
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« Reply #7 on: May 31, 2011, 02:05:14 PM »
Swapnil
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@sundaramvelar: Sir, the motor isn't burnt. The wires got twisted and broken (at the point shown by the ellipse in the attached pic). How to seperate the winding frame and the bronze coloured base (marked 'A' and 'B' in the pic) ? If I could seperate 'A' and 'B', soldering fresh wires would be easy! 

About rewinding, well, I'm a newbie, so trying to rewind the motor might make everything worse and consume time as well!

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Re: Can this BLDC motor be repaired?
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« Reply #8 on: May 31, 2011, 02:52:46 PM »
sundaram
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Aluminium frame (Bronze Coloured) and the soft iron 12 pole winding core is factory press fitted using heavy machinery, attempting to separate them at scratch build level will lead to ir-repairable damage to both. without separating them if you can manage to extend the wire by soldering and insulating with shrink wrap you can still manage to revive without having to rewind.
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« Reply #9 on: May 31, 2011, 04:20:28 PM »
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I would buy a new 2212 if I were you.
Because, even if you repaired it, I am pretty sure it wont run as good as it ran when you bought it.
A new one is about $11 i guess.
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« Reply #10 on: May 31, 2011, 04:23:47 PM »
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 .
Aluminium frame (Bronze Coloured) and the soft iron 12 pole winding core is factory press fitted using heavy machinery, attempting to separate them at scratch build level will lead to ir-repairable damage to both. without separating them if you can manage to extend the wire by soldering and insulating with shrink wrap you can still manage to revive without having to rewind.

sir you are right but there , by looking at picture it seems that the winding is ok , only the ends are diamaged, but if the winding are burnt then it will aslo burn esc , i thing after insulating the end by extending each end and unwind it only for one time,  he should check the resistance of it.
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« Reply #11 on: May 31, 2011, 04:25:31 PM »
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I would buy a new 2212 if I were you.
Because, even if you repaired it, I am pretty sure it wont run as good as it ran when you bought it.
A new one is about $11 i guess.

i think its a part of hobby and  it depends on individual .
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« Reply #12 on: May 31, 2011, 04:48:58 PM »
Swapnil
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...Because, even if you repaired it, I am pretty sure it wont run as good as it ran when you bought it. 

Yeah, exactly what I was thinking. Smiley
I'm gonna get a new one and let this one rest.
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« Reply #13 on: May 31, 2011, 05:09:38 PM »
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by looking at picture it seems that the winding is ok
Looks toasted to me Head Scratching
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« Reply #14 on: May 31, 2011, 05:16:30 PM »
iamahuman
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So,if you're getting a new one,you can try repairing this right? Grin Eitherway,you're not gonna lose anything.
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« Reply #15 on: May 31, 2011, 05:28:02 PM »
Swapnil
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Looks toasted to me Head Scratching
No sir, it's not toasted. It just flew off the mount and got twisted.
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« Reply #16 on: May 31, 2011, 05:35:59 PM »
Swapnil
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So,if you're getting a new one,you can try repairing this right? Grin Eitherway,you're not gonna lose anything.
Repairing? Well, as the pics show, the wires are damaged beyond repair. And as sundaramvelar sir says it can't be dismantled any further for repair, all that can be done is let the good thing rest in peace!
And I'm not gonna lose anything anyways, it's not mine Grin.
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« Reply #17 on: May 31, 2011, 11:00:22 PM »
sundaram
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I said only the iron core cannot be dismantled from the aluminium body, but it can sure be repaired by rewinding.

@samanth I do not agree on that a re-winded motor is not as good as the new. All Brushless motors are hand winded in all cases. The care with which it can be hand re-winded cannot be matched by any machine.

Hand re-winded motors are as good as the new. What more you have the flexibility to play around a bit with KV ratings and wattages of the motor.

Only with practice and persistence we have perfected for ourself. What is the worse it can happen is you might have to redo it all over again.

Winding of a motor take just 30 Min max if you have all the required material ready at hand.

@sunlikestar by the colour of the winding on the photographs it sure looks toasted, I wonder why the dark black colour.
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« Reply #18 on: May 31, 2011, 11:05:49 PM »
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Sandy, do you REALLY think it is toasted?
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« Reply #19 on: May 31, 2011, 11:52:42 PM »
sundaram
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On second thought it appears as if it has been given a second coat of different dark coloured enamel after winding of the poles.
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« Reply #20 on: June 01, 2011, 01:05:30 AM »
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I think the motor is toasted... If you see the first picture, you can see both the colours of the wire, copper colour and black colour, through the aluminium body. What is the condition of the ESC? Please check the ESC by connecting it to another motor.
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« Reply #21 on: June 01, 2011, 06:20:52 AM »
Swapnil
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On second thought it appears as if it has been given a second coat of different dark coloured enamel after winding of the poles.
Yes sir, that's what I think too. Because it certainly doesn't smell like it's toasted.

.... What is the condition of the ESC? Please check the ESC by connecting it to another motor.
Anam bhaiyya, it was sent to me by a friend and he said "...it came off the mount and got twisted a little , you need to put a sleeve and solder it a bit". I don't know about the ESC. But I'm sure he wouldn't send me a toasted motor. Smiley
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« Reply #22 on: June 01, 2011, 06:27:13 AM »
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Sandy sir, I'm gonna keep it in a box till I get a bit experienced with all these things and then try rewinding it. Grin
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« Reply #23 on: June 01, 2011, 09:55:10 AM »
sundaram
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Swapnil can you tell me how many magnets are there in all inside the Motor can?
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« Reply #24 on: June 01, 2011, 09:56:59 AM »
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14.
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