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Ham
Tinkerer
Username: Ham
Post Number: 5
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 25, 2008 - 11:47 am: | 
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OK, I dismantled it, now I'm trying to re-mantle it having flood cleaned it and it appears (?) cleared the blockage on the leaves.
Here are the pictures http://picasaweb.google.co.uk/londondailyphoto/CompurShutter - problem is that the actuating ring locks solid going through the firing action. I'm fairly certain that the problem is with the sprung pawl that engages with what I think must be the slow speeds mechanism, there should be some way for the speed ring to move it out the way of the mech, but I can't see how. I'm also not happy with the position of what I think must be the high speed spring - the tail of the spring doesn't look as if it is in the right position.
Once again, all help gratefully received. |
Ham
Tinkerer
Username: Ham
Post Number: 6
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 25, 2008 - 11:59 am: |
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Update - I read what I wrote and worked out where the pawl goes - doh! still not sure about that durn speed spring. |
Ham
Tinkerer
Username: Ham
Post Number: 7
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 25, 2008 - 04:33 pm: |
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Back together again - fast speeds seem to work, slow speeds and self timer a bit sluggish. |
Nickon51
Tinkerer
Username: Nickon51
Post Number: 8
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 26, 2008 - 08:55 pm: |
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Well done. They are not a particularly easy shutter to work on.
Its possible that the two clockworks trains for self timer and slow speeds may need further cleaning. I like to remove these from the shutter to do this.
The slow speed adjustment can be a bit tricky to get right after you replace it.
If you PM me with the shutters top speed and your email, I will see if I can find some service info on it.
In the mean time here's another link for U.
http://pheugo.com/cameras/index.php?page=compur&WEBMGR=aee530985e5d8d0f4c8302b8e 643db3e
Cheers
Greg |
Adrian
Tinkerer
Username: Adrian
Post Number: 178
Registered: 08-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, June 27, 2008 - 05:16 am: |
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I'll just add this as an aside, as I don't think Ham has gone about in the same way. But it might help someone else.
I recently flood-cleaned a compur shutter in a Retinette with dodgy slow speeds. I wasn't able to undo the ring securing the shutter, so had to do it in situ - not really advisable if you can avoid it! - drain and soak as much liquid out as I could, then dry out the remainder with a hairdryer. NOTE - in a well-ventilated area! I don't want to blow myself up!
I had to do this several times before the slowest speed got near to 1 second, as opposed to about 1.5 where my previous efforts had left it - so you may need several cleans before you get the desired effect.
Greg - I have a 1930s Compur with a 1/400 top speed. If it's not too much of an imposition, could you see if you have any data on that model, please?
Many thanks,
Adrian |
Ham
Tinkerer
Username: Ham
Post Number: 8
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, June 27, 2008 - 09:31 am: |
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Greg - thanks for that. As it happens, I'd decided to lube it and then I read in your link: "The Compur can usually run "dry" without any lubrication. However, on older shutters it is sometimes necessary to add a tiny bit of oil to the bearings in the slow speed assembly" which made me feel a whole lot betterer ;-)
Shutter is now firing on all cylinders including self timer! And from the look of it - using the microphone technique I'm sure I read on this forum somewhere - all speeds are within 10%!! Am I pleased! Here's the screen shot of what shutter timings using audio looks like http://picasaweb.google.co.uk/londondailyphoto/CompurShutter/photo#5216536088322 255762
I'll run a film through this weekend and see how it turns out. |
