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Old Jan 27, 2004, 11:28 PM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
avance_x
looks like a 2mm shaft?
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Old Jan 27, 2004, 11:40 PM
"Simplify, then add lightness"
Raleigh,NC
Joined Nov 2000
2,700 Posts
Art,
Mine is from a 48x creative cdrom. I am using 14 turns of #26 with the stock magnets. I used the 3mm head guide rod as a shaft and have turned the end down to 2mm like I said. I put in 3mmx6mm ball bearings from an old GWS IPS gearbox. I am using 2-cell Etec 1200mah. On a HB with stock blades, and an 11 tooth pinion, I was getting well over 20 minute flights. I cut down the blades and went with a 14 tooth pinion to get higher head speed. I think I cut them too much. I am only getting around 17 minutes now, but the control is much better.
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Old Jan 27, 2004, 11:58 PM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
jeffs555
I was wondering if you were using a head guide rod, those things are pretty tough to grind on. Hobby Lobby sells 3m brass tube and a 2mm that will slip inside the 3mm, why wouldn't that work?
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Old Jan 28, 2004, 06:49 AM
"Simplify, then add lightness"
Raleigh,NC
Joined Nov 2000
2,700 Posts
Art,
It has been so long since I did it that I can't remember how hard it was to grind it down. I would think the brass tube would probably work ok.

Jeff
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Old Jan 28, 2004, 08:26 AM
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Vince Herman's Avatar
United States, OH, Strongsville
Joined Nov 2000
2,696 Posts
I am placing a bulk order for magnets to use for these CD-Rom conversions. I am in Ohio, so shipping to North America would be affordable (probably $4 in the USA). I am getting the 5 x 2.5 x 1 magnets from engconcepts.net
These let you get closer tolerances than the 5x5x1 flat magnets. Roughly 24 magnets will fit around the inside of a CD-Rom motor. 30 would cost about $2.40 plus shipping. Larger orders would not increase the shipping. Let me know if anyone is interested.
Vince
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Old Jan 28, 2004, 08:36 AM
I see the future.
Yukonho's Avatar
Halfmoon Bay, BC, Canada
Joined Feb 2002
2,134 Posts
Thinking about magnets for a conversion. I am hoping to find 2mm thick magnets though. I guess I could stack them.
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Old Jan 28, 2004, 09:13 AM
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Vince Herman's Avatar
United States, OH, Strongsville
Joined Nov 2000
2,696 Posts
If you have the room, they do have 5x5x1, 5x5x1.5 and 5x5x2 mm on their web site.
engconcepts.net
Affordable product and inexpensive shipping. Just what I like in a supplier!
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Old Jan 28, 2004, 10:33 AM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
I've ordered some 5x5x1 N45's from http://www.engconcepts.net/ as well. I'm having very good success with the stock magnets in the old Hitachi drive motors I'm using, but want to try better magnets just to see what happens.
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Old Jan 28, 2004, 10:38 AM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
BTW, Thanks jeffs555, for your insites.
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Old Jan 29, 2004, 12:08 AM
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avance_x's Avatar
Hong Kong
Joined Jul 2003
130 Posts
Quote:
Originally posted by Art Newland
avance_x
looks like a 2mm shaft?
It's 2 mm! Originally it came with 2.5 mm shaft, I just removed the brass bushing rebore the hole and plugged in 2mm ID bearings.
The can which holds the magnet are not from the original CD-ROM motor but from one of the brushed motor that was soldered to the CD-ROm board. I just took a 2mm shaft and soldered on brass bushing of that can, simple!
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Old Jan 29, 2004, 05:48 AM
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Sydney, Down under
Joined Aug 2003
1,080 Posts
what do you guys use 4 a speed controler??
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Old Jan 29, 2004, 05:55 AM
Registered User
Aalborg, Denmark
Joined Oct 2003
269 Posts
I use Phoenix 10 with my CD-ROM motor on piccolo and
it works really great!

for some pictures and more info have a loot at

http://www.cs.auc.dk/~srba/rc

Jiri
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Old Jan 29, 2004, 08:08 AM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
Nice job jiri,
I've tried cc-10, cc-25, and cc-10 micro. All seem to do a good job running the cdrom's. I'm surprised at the low number of turns you guys are using, especially with 3S lipo's. Art
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Old Jan 29, 2004, 11:03 AM
CD-ROM Junkie
Art Newland's Avatar
Camas, Washington, USA
Joined Apr 2001
13,712 Posts
avance_x
that's some nice tinkering! I may have to try your idea on a tiny 9 pole brushless I've been saving.
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Old Jan 29, 2004, 02:31 PM
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mdttb's Avatar
United States, CA, Stanton
Joined Jan 2004
2,012 Posts
Hey Art here's the two CD-rom motor I have to work with trying to figure out how to stator off
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