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Old Mar 14, 2013, 05:55 PM
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Quote:
Originally Posted by jackerbes View Post
Not sure what you want to calculate. For an image as to how to place the windings and their turn directions, this page will do that:

http://i.caendle.de/dev/test2/?

Choose EN for English, enter 12 for slots, 14 for magnetpoles, take the 2Layer default, choose Y and click Compute and it will give the winding scheme for a 12N14P motor with a Y termination.

Jack
Ok thank you very much for your time.

What i want to calculate is how many winding i should do with the 0.2mm wire to get the correct torque for the Gopro, the database says 55 and 60 turn for a .18 wire but all i have is .20.

Thats why
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Last edited by bakchos; Mar 14, 2013 at 06:17 PM.
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Old Mar 14, 2013, 06:49 PM
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btw ebay sells cheap magnet wire and low amounts,

Here



ships pretty fast, no slow boat
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Old Mar 14, 2013, 07:29 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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OK, now I get it. No one here every says what the length of the wire they use is, only the turn count and final resistance. So here is how I would estimate the difference between wires of two sizes:

0.18mm = 33 AWG (0.180mm)

0.20mm = 32 AWG (0.202mm)

Using the calculator here: http://www.cirris.com/testing/resistance/wire.htmlWire

100 feet of 33 AWG wire has a resistance of: 20.69 ohms

Changing to 32 AWG wire and adding length to raise the lower resistance to be the same resistance I get:

126 feet of 32 AWG wire has a resistance of: 20.677 ohms

So it looks like you need to a length of wire that is 26% longer.

If the length and turn counts are linear, that would make 55 turns of 33 AWG equivalent to 69 turns of 32 AWG and 60 turns of 33 AWG equivalent to 76 turns.

It would be nice if people could post either the length of the wire (or just the length of one turn of wire) for the motors they used. That would let us make a simple look up table, by motor make and model, with the resulting resistance values they obtained.

Jack
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Old Mar 14, 2013, 07:33 PM
Jack
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Quote:
Originally Posted by TheFernMan View Post
btw ebay sells cheap magnet wire and low amounts,

Here



ships pretty fast, no slow boat
And I have spoken with the gentleman that owns that business. He is friendly to hobbyists and the wire he sells is the American made Superior-Essex brand wire. Here is the web page of another eBay seller that carries the same brand and quality of wire and offers the same good prices and service:

http://www.techfixx.com/

Jack
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Old Mar 15, 2013, 12:06 AM
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If you need winding wire you may want to stop by your local shop that do this kind of stuff on a daily basis.. Here i Norway we have many shops that rewind broken or burned 3 phase motors and so on. And the price is not bad at all, I payed 200kr (34$) for 400g of 0.2mm wire

This is for Norway but i guess this will be doable in any country
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Old Mar 15, 2013, 02:55 PM
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Canada, QC, Blainville
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Quote:
Originally Posted by culexus View Post
If you need winding wire you may want to stop by your local shop that do this kind of stuff on a daily basis.. Here i Norway we have many shops that rewind broken or burned 3 phase motors and so on. And the price is not bad at all, I payed 200kr (34$) for 400g of 0.2mm wire

This is for Norway but i guess this will be doable in any country
the only place i found it is in Montreal, 29$+12$ shipping for a 1/2lbs roll of 32Awg.
all the local shop only have 28 or less awg wire.
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Old Mar 15, 2013, 03:45 PM
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Jack or anyone,

Can you confirm its ok to follow this image



I have 34 AWG wire and I will attempt 70 turns. lol i dont expect much. Only to learn and practice. I would most like buy motors already rewound.
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Old Mar 15, 2013, 06:02 PM
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Yes, the scheme is right
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Old Mar 15, 2013, 06:11 PM
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Thats not the way I wind mine

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Old Mar 15, 2013, 06:12 PM
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Thanks

Edit: so there two answers?
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Old Mar 15, 2013, 06:14 PM
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Quote:
Originally Posted by Coyote64 View Post
Thats not the way I wind mine

So are you saying that the winding you picture IS the way you did yours and not the way I pictured it?
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Old Mar 15, 2013, 06:17 PM
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Yes the picture I attached is the way I have wound mine
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Old Mar 15, 2013, 07:33 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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There are at least three different ways to do the dLRK wind and if you take those and reverse the directions of the turns on all arms, there are three more ways.

Every one of those will work exactly the same and equally as well.

My two images are one taken from a Komodo kit motor manual with some notes added, the second is from the test2 calculator.

Jack
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Old Mar 15, 2013, 10:31 PM
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Did the first two phases and I got 10 ohms so I guessing I'm on the right track. It's not great looking though lol

I'm using a Keda motor A20-50S with 34 AWG 70 turns. I hope I didn't miss count lol
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Old Mar 16, 2013, 07:04 AM
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Joined Jun 2004
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Coyote's post (190) expains all, I found the easiest way is to forget the diagram to start with, number the ends of all the stator arms, then wind according to the 'cheat sheets' on that video....... start at arm 2 clockwise, arm 1 anti-clockwise etc.....easy....but a pain in the neck after 3600 turns.....
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