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Mamod MM2 Running N Scale train via Homemade genny!
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metalhead100


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Joined: 27 Dec 2008
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Location: Indiana USA
PostPosted: Mon Nov 02, 2009 2:02 am    Post subject: Mamod MM2 Running N Scale train via Homemade genny! Reply with quote
Ok first off sorry for the low reso video...I forgot to select the better size ...This was a end of the night job.

I made a genny from a carbon brushed dc toy motor and encased it in brass to spiff it up.

Then mounted a large Tamiya pulley to the MM2 just by shimming the flywheel out and screwing the pulley on through the flywheel hole...worked perfect and easy to remove.

I first drove 9 white LEDs in a cluster from a old flashlight....Then I thought.......hmmmmmmm What about a small train?

This is on meths direct wired to genny...no speed control.




Jim
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27ace27


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Joined: 01 Jul 2009
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Location: Omaha Nebraska, USA
PostPosted: Mon Nov 02, 2009 2:06 am    Post subject: Reply with quote
that's delightfully Mad!
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IndianaRog


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Joined: 26 Dec 2006
Posts: 9329


Location: Indiana, USA
PostPosted: Mon Nov 02, 2009 2:11 am    Post subject: Reply with quote
Jim, that is just plain cool!!!  Hard to believe it would drive a train, but proof positive!!!

That should look nice around a Christmas tree if you don't set the tree on fire!!

Rog
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johnreid


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Joined: 06 Sep 2007
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Location: Friendship Indiana, USA
PostPosted: Mon Nov 02, 2009 2:15 am    Post subject: Reply with quote
Cool, I think Peter SantaMaria powered an HO with a Stepper, but your MM2 really did the job right.
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Les


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Joined: 03 Nov 2007
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Location: Bournemouth, Dorset, England.
PostPosted: Mon Nov 02, 2009 10:36 am    Post subject: Reply with quote
A new meaning for a steam train, very cleverly done.
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James


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PostPosted: Mon Nov 02, 2009 12:57 pm    Post subject: Reply with quote
That's great to see!  
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Sandman


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Joined: 19 Jul 2006
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PostPosted: Mon Nov 02, 2009 2:28 pm    Post subject: Reply with quote
What a great idea.    

Wonderful stuff.
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Dampfmaschine


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Joined: 24 Dec 2008
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PostPosted: Mon Nov 02, 2009 2:32 pm    Post subject: Reply with quote
Very inspiring
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Ross


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Joined: 20 Jun 2009
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Location: Lincoln UK
PostPosted: Mon Nov 02, 2009 4:00 pm    Post subject: Reply with quote
Thats got some power!



Ross
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Dr. Rog


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Joined: 30 Dec 2008
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Location: Kingsclere
PostPosted: Mon Nov 02, 2009 9:10 pm    Post subject: Reply with quote
It works!  

Good idea. What is the pully ratio and how many poles is the motor?

 
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metalhead100


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Joined: 27 Dec 2008
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Location: Indiana USA
PostPosted: Mon Nov 02, 2009 9:34 pm    Post subject: Reply with quote
Dr.. the ratio is pretty close to 4 1/2 to 1

The motor is a 3 pole as far as i know.....I only popped it open enough to see the brushes and verify the carbon ends.

I just culled through my stash and found a good carbon brushed one so it will last longer and gave it a try.

It makes the Old girl work hard....and takes full tilt to run the train....

Thanks for the comments fellas!  Its all in fun......sooner or later just seeing a flywheel turn gets old and I (we) start getting creative.

Jim
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igy569


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Joined: 08 Mar 2008
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PostPosted: Tue Nov 03, 2009 12:40 am    Post subject: Reply with quote
Great stuff.
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Dr. Rog


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Joined: 30 Dec 2008
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Location: Kingsclere
PostPosted: Tue Nov 03, 2009 10:36 pm    Post subject: Reply with quote
Wonderful - 12 to 14 poles per revolution, nice small genny.

I have pretty much all I need to copy you. I think my smallest N-guage loco should need less current so there is some room for drops in efficiency.  

Thnaks for the inspiration, imitation is the best form of flattery.    
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metalhead100


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Location: Indiana USA
PostPosted: Wed Nov 04, 2009 1:09 am    Post subject: Reply with quote
DR...

Next time i hook it up i will measure the MAH draw....

Its a new 5 pole skewed arm Bachmann...very nice runner ...

Jim
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Dr. Rog


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Joined: 30 Dec 2008
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PostPosted: Wed Nov 04, 2009 9:37 pm    Post subject: Reply with quote
metalhead100 wrote:
DR...

Next time i hook it up i will measure the MAH draw....

Its a new 5 pole skewed arm Bachmann...very nice runner ...

Jim


Those new 5-poles are very efficient, that could certainly contribute to success.
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