[sdiy] Tonewheel relics

[Rutger Vlek]

Dear all,

@roman and Richie: thanks! From my limited experience with bldc's I feel
they would be costly, especially a 12-way driver system for them. Would
they need hall sensor feedback to get the tuning accurate enough?

The pll sounds nice and classic. I'll look into that. At present I'm not
sure if the pick-up  coils of the generator could handle more loading, e.g.
As required for closing the loop. But a high impedance buffer would
probably be ok.

@ingo : wow, another pari. The parie version is more recent, but has an
identical generator. My scanner is also belt driven. Could be interesting
to give it its own speed controlled motor!

Best,

Rutger

Op 22 okt. 2017 16:02 schreef "Ingo Debus" <igg.debus at gmail.com>:

>
> > Am 22.10.2017 um 15:18 schrieb Rutger Vlek <rutgervlek at gmail.com>:
> >
> > I have a decision to make on what to do with a 1970's tone wheel organ.
> I bought it cheap a few years ago. It's a Pari Attack, Italian Hammond
> clone.
>
> Ah, a Pari! Definitely a rarity. Myself I own a Parie (with e), which is
> an even stranger beast.
>
> How were the replacement gears made? Milled or 3D-printed? If 3D-printed,
> which method? Laser-sintered parts can be very accurate and sturdy. See my
> 3D-printed Hammond switch replacement:
> https://photos.app.goo.gl/piZQe7cst7gFj12G3
> But if you need many parts, this will get expensive.
>
> What’s the revolution speed of the tone wheels? Maybe you can use twelve
> stepper motors?
>
> One question out of curiosity: how is the vibrato scanner driven? Also via
> gears? In my Parie, both the tone wheels and the scanner are belt driven.
> Unlike on a Hammond, it's very easy to change the speed of the scanner
> (just remove the belt and spin it by hand). A very slow scanner vibrato
> sounds awesome.
>
> Ingo
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