Mar 14, 2013, 05:55 PM
2Vision-Air
Joined Aug 2009
2,276 Posts
Quote:
 Originally Posted by jackerbes 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
Last edited by bakchos; Mar 14, 2013 at 06:17 PM.
 Mar 14, 2013, 06:49 PM Too Many Thread Subscriptions United States, FL, Miami Joined Jul 2012 2,233 Posts btw ebay sells cheap magnet wire and low amounts, Here ships pretty fast, no slow boat
 Mar 14, 2013, 07:29 PM Jack USA, ME, Ellsworth Joined May 2008 17,932 Posts 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
Mar 14, 2013, 07:33 PM
Jack
USA, ME, Ellsworth
Joined May 2008
17,932 Posts
Quote:
 Originally Posted by TheFernMan 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
 Mar 15, 2013, 12:06 AM Registered User Norway Haugesund Joined Jun 2010 329 Posts 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
Mar 15, 2013, 02:55 PM
2Vision-Air
Joined Aug 2009
2,276 Posts
Quote:
 Originally Posted by culexus 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.
 Mar 15, 2013, 03:45 PM Too Many Thread Subscriptions United States, FL, Miami Joined Jul 2012 2,233 Posts 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.
 Mar 15, 2013, 06:02 PM Registerer Used Paris Joined May 2010 715 Posts Yes, the scheme is right
 Mar 15, 2013, 06:11 PM Praying for better weather Joined Dec 2007 4,278 Posts Thats not the way I wind mine
 Mar 15, 2013, 06:12 PM Too Many Thread Subscriptions United States, FL, Miami Joined Jul 2012 2,233 Posts Thanks Edit: so there two answers?
Mar 15, 2013, 06:14 PM
United States, FL, Miami
Joined Jul 2012
2,233 Posts
Quote:
 Originally Posted by Coyote64 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?
 Mar 15, 2013, 06:17 PM Praying for better weather Joined Dec 2007 4,278 Posts Yes the picture I attached is the way I have wound mine
Mar 15, 2013, 07:33 PM
Jack
USA, ME, Ellsworth
Joined May 2008
17,932 Posts
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