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[OM] Re: Motor Drive 1

Subject: [OM] Re: Motor Drive 1
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Thu, 28 Oct 2004 13:10:04 -0400
sprockets will rip.  I've seen some fuji films pulled right off the spool.

John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
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----- Original Message ----- 
From: "Simon Worby" <simon@xxxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Thursday, October 28, 2004 9:47 AM
Subject: [OM] Re: Motor Drive 1


>
> Piers wrote:
>
>> I have read all the responses you quoted, and "it's highly probably that 
>> the
>> film will get ripped at the sprockets" is your own supposition, and not
>> either suggested by any of the responses you had, or supported my 
>> experience
>> with four different MDs - 1 early version MD1, two late version MD1 and 
>> one
>> MD2, all of which correctly sensed the end-of-film and reacted 
>> appropriately
>> (as they were designed to do).
>>
>> There may be a deficiency in your reactions (as in mine) but there _is_ a
>> fault with your MD1.
>
> It is indeed my supposition and I freely admit that in my own e-mail. But 
> what John wrote was:
>
>> But if you try to fire more than 2-3 times, film sprockets will rip.
>
> Not "could" or "might", but *will*.
>
> Based on this, if you're firing at 5 fps, that give you somewhere between 
> 0.4 and 0.6 of a second to react and release the trigger before the film 
> *will" rip. My supposition is that releasing the trigger in less than half 
> a second is probably unlikely, hence on Sequence the film *will* rip.
>
> What am I missing?
>
> Thanks,
>
> Simon
>
>
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