Thread Tools
This thread is privately moderated by Ron van Sommeren, who may elect to delete unwanted replies.
Old Oct 27, 2004, 10:40 AM
latrans is offline
Find More Posts by latrans
Registered User
Joined Aug 2004
734 Posts
My idea for joining two cans together to make a double. Pull out both stock magnetic rings carefully, you should be able to get one out intact or mostly intact. Now place the magnetic rind half way inside one can and then slip the other can over the protruding magnet ring. Solder and then cut the top off of one of the cans. Viola.

Latrans
latrans is offline Find More Posts by latrans
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 28, 2004, 10:16 PM
olmod is offline
Find More Posts by olmod
Good Better Best quest.
olmod's Avatar
Australia, VIC, Langwarrin
Joined Apr 2004
10,686 Posts
When

You have finished the bell assembly try setting it up in a magnetic prop ballancer ,you may get a surprise and have to do a bit of adjusting ,even some store bought motors are a long way out of ballance.
olmod is offline Find More Posts by olmod
Reply With Quote
Old Oct 28, 2004, 10:49 PM
mgdon is offline
Find More Posts by mgdon
Registered User
United States, NC, Belmont
Joined Mar 2004
700 Posts
Olmod,
I've noticed the same thing.
Any ideas how it would be best to balance them?
mgdon is offline Find More Posts by mgdon
Reply With Quote
Old Oct 29, 2004, 02:11 AM
Bilbobaker is offline
Find More Posts by Bilbobaker
Suspended Account
Bilbobaker's Avatar
United States, UT, Salina
Joined Apr 2003
3,117 Posts
Quote:
Originally Posted by mgdon
Olmod,
I've noticed the same thing.
Any ideas how it would be best to balance them?
To balance mine I just drilled holes in the flux ring. I wonder if just adding some lead between the magnets would be better though.
Would only work on the 4mm wide magnets right?
Seems like drilling holes will make weird things happen in the magnetic field on the flux ring.
I used to play with magnets and paper sheets and iron filings as a kid and you can do some really strange magnetic field distortions buy drilling holes and glueing pieces of magnets together etc.
Bill
Bilbobaker is offline Find More Posts by Bilbobaker
Reply With Quote
Old Oct 29, 2004, 02:30 AM
AIR MOVER is offline
Find More Posts by AIR MOVER
Master of the Wind
AIR MOVER's Avatar
TEXAS
Joined Jun 2001
3,044 Posts
You an use 3mm bolts and nuts as a option for bad bells that wont hold the stock shafts... I grind off the hex head on the bolt.. smooth and round the end off .. then grind down a 3mm nut to half its thickness then center the bolt in the bell with some thick ca and zap it dry fast.. then run down the front nut tight .. easy fix.. most hobby stores carry the metric bolts in the parts dept for rc cars... I use the 3X50mm bolts there is plenty of unthreaded shaft for the bearings and enough threaded area for gws slowfly props and spinners.....here is a pic .
AIR MOVER is offline Find More Posts by AIR MOVER
Reply With Quote
Old Oct 29, 2004, 05:20 AM
Ron van Sommeren is offline
Find More Posts by Ron van Sommeren
homo ludens modellisticus
Ron van Sommeren's Avatar
Netherlands, GE, Nijmegen
Joined Feb 2001
13,243 Posts
Reducing stator diameter

Reducing stator diameter


Quote:
Originally Posted by olmod
... I have on a number of occassions done this by either chucking in a pedistal drill or lathe and using a fine tooth file and or emery paper backed with a file with success, just dont try it with a cutter,
Quote:
Originally Posted by lensrc
... I mounted the spindle and finished stator in the lathe, and strapped my Dremel to the tool post. With the lathe turning slowly, in the oppisite direction of the dremel, I ground it down with very good precision, resulting in the tightest air gap I have ever achieved.

Len
Quote:
Originally Posted by fwilly
I usuallly put it in my dremel tool, spin it up, and lightly press it against a running belt sander ...
Ron van Sommeren is offline Find More Posts by Ron van Sommeren
Reply With Quote
Old Nov 02, 2004, 08:15 PM
matchlessaero is offline
Find More Posts by matchlessaero
Registered User
matchlessaero's Avatar
Tennessee/Mid-South US
Joined Mar 2002
1,534 Posts
To remove the CA'ed in place magnets from your can if you want do 'do over', cut a soda can in half and fill it with acetone. Dump the can in and come back 2hrs later. The magnets will slide right out.. (Make sure to put the acetone somewhere safe and cover the can).

(I have read this thread start to finish and did not see that tip. If I missed it please don't hesitate to delete my post... )
matchlessaero is offline Find More Posts by matchlessaero
Reply With Quote
Old Nov 02, 2004, 08:22 PM
mad mike is offline
Find More Posts by mad mike
I crash, therefore I FLY!
mad mike's Avatar
Spring Hill, FL
Joined Feb 2003
1,502 Posts
I've found that the so-called "acetone-free" fingernail polish remover will work, too. I let the can soak in this stuff, overnight, using the smallest sized container that the can will fit into.

Doesn't seem to work as fast as acetone, but it does work.

Mike S.
mad mike is offline Find More Posts by mad mike
Reply With Quote
Old Nov 03, 2004, 08:08 AM
Jay C is offline
Find More Posts by Jay C
Unicorn
Jay C's Avatar
(Cordova)Memphis, TN
Joined Jul 2002
1,815 Posts
Just to complete the thought, if you are in a hurry, buy a bottle of CA remover. Magnets ready to remove in 15mins or so

Oh, and it's great for unsticking fingers too ... or so I've read
Jay C is offline Find More Posts by Jay C
Reply With Quote
Old Nov 03, 2004, 09:50 PM
bz1mcr is offline
Find More Posts by bz1mcr
AKA Don
United States, FL, Naples
Joined Dec 2002
7,798 Posts
Quote:
Originally Posted by matchlessaero
To remove the CA'ed in place magnets from your can if you want do 'do over', cut a soda can in half and fill it with acetone. Dump the can in and come back 2hrs later. The magnets will slide right out.. (Make sure to put the acetone somewhere safe and cover the can).

(I have read this thread start to finish and did not see that tip. If I missed it please don't hesitate to delete my post... )
Glass baby food containers work well for this, and they have a screw on cap. If you have no babies around $1 will buy several, full of that yummy stuff.
Cours' if you use a STRONG magnet spacer you will not need a do over!
bz1mcr is offline Find More Posts by bz1mcr
Reply With Quote
Old Nov 04, 2004, 07:18 PM
olmod is offline
Find More Posts by olmod
Good Better Best quest.
olmod's Avatar
Australia, VIC, Langwarrin
Joined Apr 2004
10,686 Posts
fluxit

In an earlier post i wrote about the use of loudspeaker centre pole pieces being a scource of the right stuff,after doing some preliminary tests on this GB stator+4, i can now state a positive outcome,the amp draw was lower for the same output,the wall thickness for the flux ring was 1mm,the mags were 2 mm thick x5x5s installation of mags made easy by use of STRONGRCMOTORS allingment tool ive included pics soz about the lousy res' my testing is not completed i need bigger props thats how good it is
olmod is offline Find More Posts by olmod
Last edited by olmod; Nov 04, 2004 at 07:57 PM. Reason: wrong text
Reply With Quote
Old Nov 07, 2004, 10:40 AM
Art Newland is offline
Find More Posts by Art Newland
CD-ROM Junkie
Art Newland's Avatar
United States, WA, Bellingham
Joined Apr 2001
14,614 Posts
El-Cheapo GBL Motor Mount

whaddayathink?
Art Newland is offline Find More Posts by Art Newland
Reply With Quote
Old Nov 07, 2004, 02:31 PM
Art Newland is offline
Find More Posts by Art Newland
CD-ROM Junkie
Art Newland's Avatar
United States, WA, Bellingham
Joined Apr 2001
14,614 Posts
Quote:
Originally Posted by rysium
Looks nice
What material is that?
How does it fit over 8mm tubes?
What price is that?
Where to buy?

RysiuM

Very hard rubber (neoprene maybe?)

Very tight fit over the GBL bearing tube, was hard to pull it back off. I think a drop of CA would hold it very well.

2 came in the package for about $3

Auto parts store.

weighs 3 grams
Art Newland is offline Find More Posts by Art Newland
Reply With Quote
Old Nov 11, 2004, 11:04 AM
rysium is offline
Find More Posts by rysium
Why not Delta?
rysium's Avatar
Sacramento, CA
Joined Jun 2003
1,713 Posts
Quote:
Originally Posted by Ron van Sommeren
Removing windings from old motors
http://www.eschmidt.de/galerie/wicklung/index.htm
That reminded me the time I worked in small electrical shop rewinding electrical brushed motors (about 1kW). First I mounted the rotor on a lathe and cut (turned) the wires on bothe sides (all the way to the shaft), then I put the motor in a stove for about an hour (around 300F) to soften and burn the laquer. After that I punched out the wires from slots. It was a fun.

RysiuM
rysium is offline Find More Posts by rysium
Reply With Quote
Old Nov 21, 2004, 03:17 AM
escudo is offline
Find More Posts by escudo
Registered User
Joined Nov 2004
71 Posts
Easy and clean removal of magnet ring from bell

CAUTION: chemicals mentioned in this tip are FLAMMABLE AND TOXIC.

Tip to remove internal magnet ring assembly from CDROM brushless motor "bell". People seem to have a lot of trouble with this...most seem to physically attack the ring, chipping at it, trying to pry it loose, etc.

I soaked my "bell" in acetone for about 4 hours, and the magnet ring just slid out in once piece. Easy, and the "bell" is sparkling clean. (I got the motor from a Toshiba manufactured CDRW drive). The reason I tried acetone, is that it is a solvent for cyanoacrylates. Other glues might respond better to xylene or MEK (liquid form, methyl ethyl ketone).

Escudo

(I soaked it in a small glass, with aluminum foil pressed over around the edge to help keep the acetone from evaporating too quickly. You could use a film developing tank, or anything else that won't get melted by the acetone. This trick probably won't work for all methods used to manufacture and attach the magnet ring, but hope it helps a few folks out.)
escudo is offline Find More Posts by escudo
Last edited by escudo; Nov 21, 2004 at 04:47 AM. Reason: title, clarify, and safety
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
cd-rom motor conversion homepages/tricks/sources/discussions Ron van Sommeren Parkflyers 5 May 21, 2008 05:50 PM
32X CD-Rom Drives--FOR SALE kist2001 Aircraft - Electric - Airplanes (FS/W) 0 Apr 23, 2002 04:33 PM
Looking for dead CD ROM (36x or faster) Jim McPherson Aircraft - Electric - Airplanes (FS/W) 13 Apr 12, 2002 10:47 PM
Paul Matt on CD-ROM? tiggs Scale Kit/Scratch Built 2 Mar 26, 2002 08:07 PM
F/S Realflight Sim.. CD-Rom jfruge Aircraft - Electric - Airplanes (FS/W) 2 Oct 29, 2001 08:17 AM