DIY motor tools and parts sources

[ecologito]

Since this is the first post on this forum I think it would be very helpful to have a list of tools and source for DIY motors.


All parts you need for your DIY project

www.gobrushless.com
www.strongrcmotors.com
www.komodohobby.com


CD motor Performace database (http://www.gobrushless.com/testing/motor_test_results.php) - Very helpful to have a good idea about what to expect from your project

Rotor Calculator (http://www.gobrushless.com/testing/motor_test_results.php) - If you don't know which magnets will fit on your project check this out.

Statorpoles / magentic poles / winding scheme table (http://babelfish.altavista.com/babelfish/trurl_pagecontent?lp=de_en&url=http%3A%2F%2Fpowercroco.de%2FKombinationstabel le.html) - Chart about tested and best motor build combinations.

The master Ralph (http://powercroco.de/) - For projects bigger than a CD motor always thinking of efficiency this is the website to visit, awesome tutorials, tips and data. Can be translated using http://babelfish.altavista.com

Lens RC (http://lensrc.com/kit_tutorial.htm) - DIY motor KITS and a great tutorial on how to put everything together.

Mini lathe comparison chart (http://www.littlemachineshop.com/Info/minilathe_compare.php) - Getting serious about turning your own parts but you don't have a lathe? this chart might help taking the decision.

Magnets for all projects (http://www.engconcepts.net/List_Of_Motor_Magnets.asp) - No matter what size motor for your RC plane you are building, George has it.

http://groups.yahoo.com/group/lrk-torquemax/messages/9323?threaded=1&viscount=50 - Info about steel for self made motor parts.

Feel free to post more links with helpful information and keep this thread ONLY for this info. :)

WIRE GAUGE EQUIVALENCE
http://www.geocities.com/ecogaia/wiregauge.gif

[xterarc]

thanks ecologito!
I am sure it is going to be an extra hot subforum

[chopperdave]

This page is a little out of date now, but there is a lot of great information about self-made motors.

http://www.aerodesign.de/peter/2001/LRK350/index_eng.html

[RobinBennett]

For those in the UK

www.brushlessmotors.co.uk

Very nice CNC cans for the 'standard' 22.7mm (single, double and triple) stators, plus most of the usual bits and pieces.

[jbatch]

Extensive compendium of DIY CDROM builders' info available in this thread:
http://www.rcgroups.com/forums/showthread.php?t=240993&highlight=tips+tricks

[mtbrider]

A low tech suggestion, a bamboo BBQ skewer for packing the winds onto the stator.

[bz1mcr]

bkahuna's DVD on Motor Building and Testing (http://www.strongrcmotors.com/Kits.htm) . Features Kits from Strong RC Motors and Custom CDR. It covers magnet placing and gluing, winding techniques, selecting winding turns and wire size, motor nomenclature, basic assembly, bench testing and much more. It has been purchased and used by clubs and individuals all over the world. It runs about 1 hour and makes a great club program. It's great for first time builders, but even experienced builders will learn a few things.

[KenSt]

Good call jbatch! I wonder what other stuff could be moved to this category from "Power Systems" to give this a jump start? All the Cd ROM Part 1, part 2, etc..construction threads come to mind.

[PlaneCrazee]

For gearbox and ducted fan stuff try CD Motor works (http://www.cdrworks.com/)

[helifrek]

Hey guys, I really need some help picking out magnets for my cd-rom motor. I wound it with 17 turns of magnet wire I got from radio shack, not sure what gauge but it's small and red.... :) I used 2 bearings and thats all I can really say about it. I know I want 12 magnets in there but what size, what do you guys need to know to help me. how do I determine the Kv of the motor. I want to use it on my piccolo. I will try to post some pics. and what does the number of turns do, should I use more or less or stick with 17? it looks awesome and spins very nice and true, doesn't look any different than the ones the more expierenced guys have made, I had the stuff laying around, figured I may as well do it. thanks guys.

Brandon

[ecologito]

Different companies find their way to design motor mounts. Some of them specailly for their motors, some other are very standard. Take a look and pick yours.

[fly_boy99]

I'd say keep the chitchat to another thread and leave this one for pointers to "DIY motor tools and parts sources"

Here's mine I just recently found, although it's geared towards audiophiles it got great calc tools which any motor builder can use!!!

http://www.bcae1.com/wire.htm

;) ;) ;)

[bz1mcr]

Different companies find their way to design motor mounts. Some of them specailly for their motors, some other are very standard. Take a look and pick yours.

One more just out and two new stick mounts will be available soon.

[ryanl2006]

I just got some of these stick mounts. http://www.rcgroups.com/forums/showthread.php?t=459391

They are very cheap, very light, and hold the motor very well.

[Ron van Sommeren]

A list of kit manufacturers sorted by country, parts/magnet suppliers, complete motors too, (*) indicates kit versions available, first message of this thread:
http://www.rclineforum.de/forum/thread.php?threadid=43664

Vriendelijke groeten ;) Ron

[bz1mcr]

Ron,
Thanks for making the list available.
www.strongrcmotors.com should have an (*) as I do offer kits. I have always had my own and recently added the Komodo kits as well.
Don

[Ron van Sommeren]

Done Don.

[ecologito]

Here is another useful tool to measure the performance of your motors. This is another DIY Thread about Thrust Stands:

http://www.rcgroups.com/forums/showthread.php?t=421578

[reblacklaf]

I used to wind, balance, polish and shim can motors for pro slot racers in the 60's-70's. I have some double nichrom 30awg wire [this comes on the spool with double strands so you do not have to set it up], and I am thinking of using it to wind a brushless. I have both a single and dual stator that I wish to wind. These are 22.7mm. I was wondering if someone might suggest number of winds. I tried the database but there is no way to sort out awg and/or single dual winds to use as a guide. I have just returned to model aircraft after a 40+ year layoff. Any help would be great! :)

I have noticed that noone polishes or balances the stators. I would think if the stator was polished the magnets could be placed closer in, leave less of an air gap and give more push. Is it not worth the effort? In slots it was the difference between winning or losing.

Randy

[martinbest]

Good supplier for magnets.
http://www.magnetapplications.com
No finacial link to me!
Martin

[BlazerB52]

List of other magnet suppliers.



www.engconcepts.net

www.cdmotorworks.com

www.gobrushless.com

http://www.komodohobby.com/

http://www.strongrcmotors.com/

www.kjmagnetics.com

www.powermagnetstore.com

www.supermagnete.de

www.supermagnetman.net

www.magnet4sale.com

www.aircraft-world.com (search magnets)

http://www.cy-magnetics.com/Mag_Block_NdFeB.htm

http://stores.ebay.com/China-Magnet-Source

http://www.rare-earth-magnets.com/

http://www.allmagnetics.com/

http://www.unitednuclear.com/magnets.htm

http://www.magnetsrc.com/neo_NdFeB_magnet_block_magnet.htm

http://www.neotexx.com

http://www.gaussboys.com/magnets/blocks/

[cp1]

Analyse your motor's performance.

Drive Calculator http://www.drivecalc.de

Including motor database, propeller database, battery database, ESC database, stator database.

Including rotor calculator, wire calculator, winding calculator, thrust calculator, reconfigurator.

[ecologito]

Thanks a lot to everybody for the contributions to this sub forum.

[jim e]

Hello- if my measuring/understanding is correct then i have some .7mm magnet wire. I would like to use it in winding and rewinding motors- a twelve pole 22.7mm stator first. Is this a practical size to use? jim

[bz1mcr]

Wire with an overall diameter of .70 mm is about American Wire Gage #22. That is very usable on typical RC sized motors. On a 22.7 mm nine arm stator (5 mmthick) with 12 magnet poles you can wind 10 turns and connect in a "Y" for a Kv of 3500. That is a high speed motor that might be used with a 3" prop on 3S or a 4" prop on 2S. To run a larger prop with that size wire you would want to go to a larger stator. It can be larger diameter or longer. Sometimes stators are "stacked" to make a longer motor.

You might want to look at the motor building instructions on my website www.strongrcmotors.com click on the "Instruction Doc's" button.

Have Fun!
Don