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PROJECT - Rewinding a DT750

colorex

Rotor Riot!
Mentor
#1
OK, so after this tricopter crash I have to get a new motor for it, so I'm going to play around with the remains of the first one, to see if I can learn something new, and maybe even fix it in the process.

After some research I found that the optimum configuration to wind it would be something called Delta winding, specifically dLRK. This should be done like this:

dlrk-winding-diasmal.jpg

The number of turns in the pic is just for representation issues, I'm going to use 8x34 stranded wire (should be like the stock config) making 18 turns in the configuration above. Looks like I start from the center and wind to the sides.

I won't start right now, but I wanted to share this to see if I could get some input from experienced guys.
 

jetpackninja

More combat please...
Mentor
#2
What you are looking at here should work just fine provided the DT750 is a 12 tooth stator (I can't remember)
Excellent drawing.
Have you watched the videos for rewinding the little red motors?
The same technique should be OK for any 12 tooth stator...
IMAG0358-1 (Large).jpg
[video=vimeo;18554942]http://vimeo.com/18554942[/video]
 

colorex

Rotor Riot!
Mentor
#3
DT750 is a 12 stator, 14 magnet, deltaLRK winding. I think it's not that hard, I understand perfectly what they are doing.
 

jetpackninja

More combat please...
Mentor
#5
Heat Gun.
Screw the motor mount to a board or your desk or your closet door.
Get a heat gun on it until you see it begin to smoke.
That should make the epoxy gooey enough to get the wires off.
 

colorex

Rotor Riot!
Mentor
#6
Heat Gun.
Screw the motor mount to a board or your desk or your closet door.
Get a heat gun on it until you see it begin to smoke.
That should make the epoxy gooey enough to get the wires off.
Well, I don't have a heat gun (and I shrink heatshrink with an open flame LOL) so I just cut the wires to pieces and pried them off of the stator. I just have some remains left, they should be fairly easy to get off. If it doesn't work like that, I'll have to try with a soldering gun and a brush.

Does it matter if I dent or remove a piece of the insulation around the stator? If so can I fix it with anti-rust paint?
 

jetpackninja

More combat please...
Mentor
#7
Well, I don't have a heat gun (and I shrink heatshrink with an open flame LOL) so I just cut the wires to pieces and pried them off of the stator. I just have some remains left, they should be fairly easy to get off. If it doesn't work like that, I'll have to try with a soldering gun and a brush.

Does it matter if I dent or remove a piece of the insulation around the stator? If so can I fix it with anti-rust paint?
yes- the insulation around the stator is important. It is a thick enamel. you could try to cover any nicks with some epoxy...
 

colorex

Rotor Riot!
Mentor
#12
OK, progress update: I have ordered a new motor :D

As soon as I have paid all my debts, I'll get around to finish this project.
 

earthsciteach

Moderator
Moderator
#14
I kind of fell out of rewinding motors. In my experience, high quality winding wire is a necessity. MicroDan wire is one option, Radio Shack wire is not.
 

earthsciteach

Moderator
Moderator
#16
I've only had very limited success with the Radio Shack winding wire. I think it is intended for much lighter duty motors. Motors I have rewound with their wire only last 2 or 3 fights.
 

colorex

Rotor Riot!
Mentor
#17
I've only had very limited success with the Radio Shack winding wire. I think it is intended for much lighter duty motors. Motors I have rewound with their wire only last 2 or 3 fights.
I have no idea about the wire I may get here. I only know they sell it by the weight and not the length... And I forgot how much I needed... I think 7 meters by 8 strands...