[Jukebox-list] AMi motors-was-My AMI F120 on Youtube

[Jens Hultgren]

The old style mech has very noisy motors With the ferris wheel mech, they
started using whisper quiet DC motors. Downside is that these have lower
torque, and the mechs are prone to stall, especially the transfer in end
positions.

On the older motors the brushes are accessed from the outside, very
convenient. Later motors you have to take apart. When you do so, take care
not to loose the springs as they will pop out un-expectedly. Some early
motors had plastic covers over the rotor.

Now I am trying to remember when they switched. I think the F uses one or
two of the later style motors. The good thing here is that these are still
high torque. You can use an F motor on ferris wheel mech of you just
transplant the gear box housing. The gear is different.

Later motors had a tiny rotor that only weighs about one third of the early
rotors.

  Jens

On 4/3/07, Aaron's Email <aaron at vertasource.com> wrote:
>
> The board - which is basically a big piece of cast alluminum, certainly
> amplifies the motor. I remember the first time I took one of those motors
> apart and fired it up on my bench, I though that it as pretty quiet and
> that
> I had done a successful job of restoring the motor to "factory." Man, was
> I
> shocked when I put it back on the mech board! It sounded like it was
> trying
> to unbolt itself, jump out of the jukebox, and chase me out of my shop!
> A.
> ----- Original Message -----
> From: "Ron Rich" <ronnnrich at yahoo.com>
> To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
> Sent: Monday, April 02, 2007 7:58 PM
> Subject: Re: [Jukebox-list] AMi motors-was-My AMI F120 on Youtube
>
>
> > Aaron,
> >   I have heard them before, but do not recall hearing them operate at a
> distance from the phono. Perhaps the mech "board" amplifies the sound?
> >   I don't know if this is true or not--someone once told me that the
> older
> motors are "better" then the newer ones, and that there were several types
> of those motors that appear the same, but will not interchange. Anyone
> know
> for sure??
> >   Ron Rich
> >
> > Aaron's Email <aaron at vertasource.com> wrote:
> >   Those AMI motors are noisy, Ron. I don't think I've ever seen one that
> > didn't make that "grinding" sound as it spins. The strange thing is that
> > they are actually quiet until you mount them on the mech board - which
> > amplifies their noise quite a bit. You know, now that you mention it, I
> > wonder what the difference is between the motors used on the F and G,
> and
> > the motors used on the H and I - which are so quiet you hardly know they
> are
> > running.
> > A.
> >
> > _______________________________________________
> > Jukebox-list mailing list
> > Jukebox-list at lists.netlojix.com
> > http://lists.netlojix.com/mailman/listinfo/jukebox-list
> >
> >
> >
> > ---------------------------------
> > Food fight? Enjoy some healthy debate
> > in the Yahoo! Answers Food & Drink Q&A.
> > _______________________________________________
> > Jukebox-list mailing list
> > Jukebox-list at lists.netlojix.com
> > http://lists.netlojix.com/mailman/listinfo/jukebox-list
> >
>
> _______________________________________________
> Jukebox-list mailing list
> Jukebox-list at lists.netlojix.com
> http://lists.netlojix.com/mailman/listinfo/jukebox-list
>