Rewinding Emax CF2805 & CF2822 - Page 5

Sky-walker · May 12, 2009, 08:14 PM

Hi everybody may i jump in, as I lost two dear cf2822 motors for still "mystery"" reasons. the first had one wire in one winding cut off, the other motor had his coils ugly greeny yelloww in color and got a lot sloppier when turning by hand. so i was thinking about rewinding them but I have never rewinded anything

MiseryQ · May 12, 2009, 08:46 PM

These are good motors to rewind.
The stock wire is easy to get off and I think the performance is pretty good.
Just got back from flying a plane with my fc28-05 and a Graupner 5,5x4,3 and it was GREAT!

Read timochris's tutorials on DLRK and you'll get it.
Just make sure you have good wire to make it easier on you.
Motor rewinders will almost always give you enough wire to do the motor if you explain why you want it.
I take the motor with me too. 9 feet ought to be plenty.

flydiver · May 12, 2009, 09:23 PM

The dLRK tutorial is here:
http://www.rcgroups.com/forums/showthread.php?t=736580

It applies to a 12 pole 14 magnet motor.
Personally I wouldn't start there. Easier to start with an ABC wind.

GoBrushless.com has been where I started with a cheap GBv ($10). Read the tutorial to get the basic idea. Then read the link above.

Strongrcmotors.com is having a kit sale right now and has similar stuff to gobrushless. He may be out of some items. His site is a bit less newbie friendly but has some interesting stuff.

Here's a discussion on that motor.
http://www.rcgroups.com/forums/showthread.php?t=734020

MiseryQ · May 12, 2009, 09:24 PM

IIRC this motor can't be wound ABC(?).

Ron van Sommeren · May 13, 2009, 08:50 AM

Quote:

Originally Posted by Sky-walker

Hi everybody may i jump in, as I lost two dear cf2822 motors for still "mystery"" reasons. the first had one wire in one winding cut off, the other motor had his coils ugly greeny yelloww in color and got a lot sloppier when turning by hand. so i was thinking about rewinding them but I have never rewinded anything

Rewinding/building brushless motors, must read, otherwise understanding the answers given will cost you too much time:
www.gobrushless.com
-> knowledge base
-> basic overview (1-5)

Winding tips and tricks, checks and tests:
http://www.rcgroups.com/forums/showthread.php?t=240993

Dry testing your brushless motors
http://www.wattflyer.com/forums/showthread.php?t=35216
http://www.rcgroups.com/forums/showthread.php?t=240993

Vriendelijke groeten

Ron

Sky-walker · May 13, 2009, 09:26 AM

Thank you so much i am going to check these out after work today

!

flydiver · May 13, 2009, 11:07 AM

Quote:

Originally Posted by MiseryQ

IIRC this motor can't be wound ABC(?).

It can't - it's dLRK.
If I wasn't clear I was suggesting the OP start their winding trials with an ABC wind on an appropriate motor before tackling the CF motor.

MiseryQ · May 13, 2009, 06:54 PM

Quote:

Originally Posted by flydiver

It can't - it's dLRK.
If I wasn't clear I was suggesting the OP start their winding trials with an ABC wind on an appropriate motor before tackling the CF motor.

OK, Thanks for clearing that up.

Just got back from the field flying a little plane I cooked up with the FC28-05 and a Graupner 5,5x4,3.
Measured with a radar gun it pulled off consistent 64mph passes.

I_Gotts_Ta_Fly · May 21, 2009, 03:32 AM

Quote:

Originally Posted by MiseryQ

OK, Thanks for clearing that up.

Just got back from the field flying a little plane I cooked up with the FC28-05 and a Graupner 5,5x4,3.
Measured with a radar gun it pulled off consistent 64mph passes.

I think I read through the whole thread, but I'm not clear about the batteries you were using.

When you were testing these motors with 6" props, were you using 3S or 2S for both FC2805 and FC2822?

MiseryQ · May 21, 2009, 08:24 AM

I use 3s. I tried using a high KV wind for 2s originaly and wasn't thrilled with it.

eruji · May 21, 2009, 11:55 AM

has anyone noticed that this motor has the clip on too tight. I originally took it off to wind and then could not get it back on. Then i noticed on the other motor, the clip had fallen off on its own. I guess you could move the shaft back a bit from the bell, but ive already lost both clips. Are there any easy fixes for this?

MiseryQ · May 21, 2009, 01:15 PM

The clip was "tight" on all of mine.
Some had a funny clip too that I destroyed to take off.
Moving the shaft can give you some more room and autoparts stores should have an assortment of small e-clips.

eruji · May 21, 2009, 01:44 PM

Auto parts store? great.. never thought of that one.. so moving the shaft.. i loosened the set screw but it still did not move. Is there some kind of adhesive that is put in there as well?

MiseryQ · May 21, 2009, 01:50 PM

There's no adhesive, just a press fit.
I have access to a drill press so that's what I use to press shafts in the bell.
Be carefull as a lot of people bend/break stuff trying to use a hammer.
If your using it a pusher the clip isn't even necessary.

eruji · May 21, 2009, 01:54 PM

Right, i have one in a pusher config and one in a tractor and both are missing the clips. The tractor runs just fine without it, except, every time i land it make the bell move forward and the bearing pops out which causes the motor to not spin. So i guess i need to find some replacement clips and figure out how to press the shaft to back it out a few mm.

May 13, 2009, 09:26 AM	#66
Sky-walker Registered User Join Date: Jun 2005 Posts: 775	Thank you so much i am going to check these out after work today!

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May 12, 2009, 08:14 PM	#61
Sky-walker Registered User Join Date: Jun 2005 Posts: 775	Hi everybody may i jump in, as I lost two dear cf2822 motors for still "mystery"" reasons. the first had one wire in one winding cut off, the other motor had his coils ugly greeny yelloww in color and got a lot sloppier when turning by hand. so i was thinking about rewinding them but I have never rewinded anything

May 12, 2009, 08:46 PM	#62
MiseryQ Registered User Join Date: May 2006 Location: Norfolk, Va Posts: 1,775	These are good motors to rewind. The stock wire is easy to get off and I think the performance is pretty good. Just got back from flying a plane with my fc28-05 and a Graupner 5,5x4,3 and it was GREAT! Read timochris's tutorials on DLRK and you'll get it. Just make sure you have good wire to make it easier on you. Motor rewinders will almost always give you enough wire to do the motor if you explain why you want it. I take the motor with me too. 9 feet ought to be plenty.

May 12, 2009, 09:23 PM	#63
flydiver Registered User Join Date: Jan 2007 Location: Seattle, WA Posts: 1,835	The dLRK tutorial is here: http://www.rcgroups.com/forums/showthread.php?t=736580 It applies to a 12 pole 14 magnet motor. Personally I wouldn't start there. Easier to start with an ABC wind. GoBrushless.com has been where I started with a cheap GBv ($10). Read the tutorial to get the basic idea. Then read the link above. Strongrcmotors.com is having a kit sale right now and has similar stuff to gobrushless. He may be out of some items. His site is a bit less newbie friendly but has some interesting stuff. Here's a discussion on that motor. http://www.rcgroups.com/forums/showthread.php?t=734020

May 12, 2009, 09:24 PM	#64
MiseryQ Registered User Join Date: May 2006 Location: Norfolk, Va Posts: 1,775	IIRC this motor can't be wound ABC(?).

May 21, 2009, 08:24 AM	#70
MiseryQ Registered User Join Date: May 2006 Location: Norfolk, Va Posts: 1,775	I use 3s. I tried using a high KV wind for 2s originaly and wasn't thrilled with it.

May 21, 2009, 11:55 AM	#71
eruji "plane don't hurt" Join Date: Aug 2005 Location: Mountain Home Village, CA Posts: 328	has anyone noticed that this motor has the clip on too tight. I originally took it off to wind and then could not get it back on. Then i noticed on the other motor, the clip had fallen off on its own. I guess you could move the shaft back a bit from the bell, but ive already lost both clips. Are there any easy fixes for this?

May 21, 2009, 01:15 PM	#72
MiseryQ Registered User Join Date: May 2006 Location: Norfolk, Va Posts: 1,775	The clip was "tight" on all of mine. Some had a funny clip too that I destroyed to take off. Moving the shaft can give you some more room and autoparts stores should have an assortment of small e-clips.

May 21, 2009, 01:44 PM	#73
eruji "plane don't hurt" Join Date: Aug 2005 Location: Mountain Home Village, CA Posts: 328	Auto parts store? great.. never thought of that one.. so moving the shaft.. i loosened the set screw but it still did not move. Is there some kind of adhesive that is put in there as well?

May 21, 2009, 01:50 PM	#74
MiseryQ Registered User Join Date: May 2006 Location: Norfolk, Va Posts: 1,775	There's no adhesive, just a press fit. I have access to a drill press so that's what I use to press shafts in the bell. Be carefull as a lot of people bend/break stuff trying to use a hammer. If your using it a pusher the clip isn't even necessary.

May 21, 2009, 01:54 PM	#75
eruji "plane don't hurt" Join Date: Aug 2005 Location: Mountain Home Village, CA Posts: 328	Right, i have one in a pusher config and one in a tractor and both are missing the clips. The tractor runs just fine without it, except, every time i land it make the bell move forward and the bearing pops out which causes the motor to not spin. So i guess i need to find some replacement clips and figure out how to press the shaft to back it out a few mm.