Olympus-OM
[Top] [All Lists]

[OM] Re: T-45 misfiring (was "Dr. Flash...)

Subject: [OM] Re: T-45 misfiring (was "Dr. Flash...)
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Fri, 05 Oct 2007 08:07:33 -0400
I still think it's the nicad pack, md switch in the camera body or 
intermittent M Grip cord causing the problem.

___________________________________
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington NY 11743
631-424-2121 | Olympus OM Service since 1977
http://www.zuiko.com  |  omtech1 AT verizon.net


Chuck Norcutt wrote:
> But wouldn't electronic switch chatter be faster than what the motor 
> drive and camera could respond to?  I have little experience with 
> debouncing switches in software but my recollection is that we're 
> talking times of a few milliseconds at most.  Since the motor drive can 
> only run about 5 frames/sec it can't respond to events of less than 
> 200ms duration without having some form of memory to capture the switch 
> bounce.  What's the flaw in my logic?  Is it the user's thumb that's 
> doing the chattering at a much slower rate than switch contact bounce?
> 
> Chuck Norcutt
> 
> John Hermanson wrote:
> 
>>Maybe, possibly could be a dirty (chattering) switch in the T-45. It's
>>making partial contact so the motor thinks the button was pushed two or 
>>more times when it is only being held down.
>>
>>___________________________________
>>John Hermanson
>>Camtech Photo Services, Inc.
>>21 South Lane, Huntington NY 11743
>>631-424-2121 | Olympus OM Service since 1977
>>http://www.zuiko.com  |  omtech1 AT verizon.net
>>
>>
>>John Morton wrote:
>>
>>>Ah - okay; no, I haven't had any problems with the motor drive when
>>>using it on the camera alone. Also, I haven't had any problems with
>>>the flash used on the camera alone. Just with the flash and motor
>>>drive together.
>>>
>>>I first noticed something amiss when shooting some film of a band in
>>>a club: set to single frame, the motor drive was taking two exposures
>>>every time I took a shot with the T-45 flash.
>>>
>>>A month or two later, I tried to take a few frames of a Monarch
>>>butterfly on some Echinacia I have growing in my backyard. "A couple
>>>of shots" instead turned into a whole roll; and not long afterward,
>>>while visiting my daughter in British Columbia (end of August), the
>>>same thing happened again when taking some photos of her playing
>>>ping-pong: 'a shot or two' became the whole roll.
>>>
>>>It is a used flash (KEH) and I've had it for less than a year, so I
>>>don't really know what to expect from it. I certainly didn't expect
>>>that; but it is a really nice flash (well, as a concept) and I would
>>>like to be able to use it with the motor drive.
>>>
>>>John M.
>>>
>>>
>>>>>>><<<<
>>>
>>>Date: Tue, 02 Oct 2007 09:04:19 -0400 From: John Hermanson
>>><omtech1@xxxxxxxxxxx> Subject: [OM] Re: Is Dr. Flash in jeopardy?
>>>
>>>
>>>I mean, when you use the body and motor drive by itself, does the 
>>>camera shoot more than one frame when set to single mode?  Does the
>>>multiple firing with the T-45 and motor drive happen on more than one
>>>body? As Chuck said, the button on the T-45 is just a switch. If the
>>>motor is set to single, and it fires more than one frame, it usually
>>>indicates a defect in nicad pack or md switch in the camera body.
>>>
>>>___________________________________ John Hermanson Camtech Photo
>>>Services, Inc. 21 South Lane, Huntington NY 11743 631-424-2121 |
>>>Olympus OM Service since 1977 http://www.zuiko.com  |  omtech1 AT
>>>verizon.net
>>>
>>>
>>>
>>>
>>>John Morton http://OriginOfWriting.com
>>>
>>>============================================== List usage info:
>>>http://www.zuikoholic.com List nannies:
>>>olympusadmin@xxxxxxxxxx 
>>>==============================================
>>>
>>>
>>
>>==============================================
>>List usage info:     http://www.zuikoholic.com
>>List nannies:        olympusadmin@xxxxxxxxxx
>>==============================================
>>
>>
>>
> 
> 
> ==============================================
> List usage info:     http://www.zuikoholic.com
> List nannies:        olympusadmin@xxxxxxxxxx
> ==============================================
> 
> 

==============================================
List usage info:     http://www.zuikoholic.com
List nannies:        olympusadmin@xxxxxxxxxx
==============================================

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz