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Old Jan 28, 2004, 12:28 AM
Art Newland is offline
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avance_x
looks like a 2mm shaft?
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Old Jan 28, 2004, 12:40 AM
jeffs555 is offline
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"Simplify, then add lightness"
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.
Old Jan 28, 2004, 12:58 AM
Art Newland is offline
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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?
Old Jan 28, 2004, 07:49 AM
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"Simplify, then add lightness"
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
Old Jan 28, 2004, 09:26 AM
Vince Herman is offline
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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
Old Jan 28, 2004, 09:36 AM
Yukonho is offline
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I see the future.
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Thinking about magnets for a conversion. I am hoping to find 2mm thick magnets though. I guess I could stack them.
Old Jan 28, 2004, 10:13 AM
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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!
Old Jan 28, 2004, 11:33 AM
Art Newland is offline
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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.
Old Jan 28, 2004, 11:38 AM
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BTW, Thanks jeffs555, for your insites.
Old Jan 29, 2004, 01:08 AM
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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!
Old Jan 29, 2004, 06:48 AM
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what do you guys use 4 a speed controler??
Old Jan 29, 2004, 06:55 AM
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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
Old Jan 29, 2004, 09:08 AM
Art Newland is offline
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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
Old Jan 29, 2004, 12:03 PM
Art Newland is offline
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avance_x
that's some nice tinkering! I may have to try your idea on a tiny 9 pole brushless I've been saving.
Old Jan 29, 2004, 03:31 PM
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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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