The ss dial is meshed with a gear, on which is mounted brushes which rub on
resistive elements on a circuit board, 1 for each shutter speed.
John
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----- Original Message -----
From: Giles <cnocbui@xxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Monday, August 30, 1999 2:23 PM
Subject: Re: [OM] Oly Shutter Speed Control
>
> Apart from not agreeing with you on a number of points ;-) the shutter
speed ring
> is not the switch itself. It is a machined piec of aluminium with square
notches
> milled on the inside. A sort of leaf spring forces a small ball bearing
into the
> notches to proved the positive click-action. There are also gear teeth
milled in it
> which engage a gear wheel in the body, which must be where the shaft
position
> sensor/switch is located.
>
> I suspect Olympus may have varied the stiffness of the leaf spring on the
Tis.
>
> Giles
>
> Winsor Crosby wrote:
>
> > mechanical linkages like the OM1? My OM4T ring is quite smooth, but it
is
> > after all, I think, just a switch for the electronically timed shutter.
> >
>
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>
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