Yes.Is this about shutters, or life in general?
Shutter speeds off after no usage for months
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LOL. Tony
you just have to decide to use 1 shutter speed and only exercise that one
. problem solved ( NOT ! ). 
good luck!
John
Tony... based on that experience you should grit your teeth and seek a professional overhaul or you’ll never get past the point of frustration. Or grit your teeth and seek a replacement. Sorry to be the bearer of bad news. I’m too often a “glass half-empty” person but this time I’m correct.
I have to agree with Brian on this one, not that I am any expert. I have had shutters slow down after CLA where some exercise has been helpful, but certainly not to that extent. In fact I have to say that in my experience it tends to be the faster speeds that slow down a bit, not the slow speeds.
Is this about shutters, or life in general?
If we were supposed to exercise we would have been born with wheels.
LOL. Tony
you just have to decide to use 1 shutter speed and only exercise that one
good luck!
John
There is a reason I used the words I posted. The shutter works on the fastest speed and the escapement sets the slower speeds. Exercising on the slowest speed complete cleans the escapement, the other speeds do not.
Are you saying that there are two modes of operation one for 'slow speeds' [<1/30s] and one for 'faster speeds' [=&>1/30s]?
If so, is a recommendation from a PM to gently flush the shutter with a little Isopropyl alcohol fire it a few times while the blades are wet valid and/or applicable?
regards
Tony
As typical shower maintenance,As typical shutter maintenance, I work through all shadow speeds once every six months; that has worked well so far.
Ref: post 32.
SACRILEGE!!!!
Sorta kinda valid. I use naptha, VERY SPARINGLY! It's best if the front plate of the shutter is removed for access to the escapement itself.
Using a straight pin A drop on each pivot point is applied.
It may take several light aplications.
DO NOT LET ANY GET 0N THE BLADES or you're going to have them stuck open on every speed
SACRILEGE!!!!
Sorta kinda valid. I use naptha, VERY SPARINGLY! It's best if the front plate of the shutter is removed for access to the escapement itself.
Using a straight pin A drop on each pivot point is applied.
It may take several light aplications.
DO NOT LET ANY GET 0N THE BLADES or you're going to have them stuck open on every speed
For speeds 1 second through 1/100 -1/125 the delay timing is set to a varying degree to hold the shutter blades open for the predetermined time on the speed ring, for 1/200 - 1/250 and faster the delay timing is not engaged and a booster spring is incorporated to force the blades closed faster. 1 second sets the delay timer to its maximum.
Your camera could have two speeds, however the way almost all left shutters work is the highest speed is trips the shutter and all the slower speed use the escapement to count down the time. Exercising the slowest speed works the shutter tripping and the complete range of the escapement. B does not exercise the escapement.
Back in post 13 I posted some screen shots of the delay timer in a CN-1110-000 shutter. The CN-1110-000 is a #00 shutter but is used for #0 shutters as the build and assembly are the same.
The Compur Service Manual can be downloaded at https://www.scribd.com/doc/44503560/Compur-Shutter-Repair-Manual
I picked up one of my Synchro Compur #1 (CN-1210-000) that would not operate on 1, 1/2, and 1/25 as well as B & T. I have had it stored for about 18 months and it picked up some light corrosion. I replaced it as I could not get it to operate to suite me.
I found that the main cocking ring (528) was hanging at the delay timer operating lever (305), ((black arrow on the manual image). Removing the delay timing assembly I discovered the notch of 305 to be rough with a shallow lip that the cocking ring 528 was catching on and the inner edge of the formed contact area of 528 (white arrow on the parts) is worn sharp on the inner edge with a hook at the bottom of the inner edge. The edges should be slightly rounded and smooth.
The edges at the white arrows in the pictures of the actual parts need to be polished smooth so that the spring tension will pull the cocking ring past the timing delay as it should. The cocking lever can be pushed to the closed position operating the shutter.
A shop repair tech will probably not be willing to smooth these surfaces for a customer as the bench/shop time that will have to be billed will make it too expensive.
This cocking ring to delay timer operating contact is common if not the same for Compur shutters from the Rim Set to the final production of the Synchro Compur.
The Compur Service Manual can be downloaded at https://www.scribd.com/doc/44503560/Compur-Shutter-Repair-Manual
I picked up one of my Synchro Compur #1 (CN-1210-000) that would not operate on 1, 1/2, and 1/25 as well as B & T. I have had it stored for about 18 months and it picked up some light corrosion. I replaced it as I could not get it to operate to suite me.
I found that the main cocking ring (528) was hanging at the delay timer operating lever (305), ((black arrow on the manual image). Removing the delay timing assembly I discovered the notch of 305 to be rough with a shallow lip that the cocking ring 528 was catching on and the inner edge of the formed contact area of 528 (white arrow on the parts) is worn sharp on the inner edge with a hook at the bottom of the inner edge. The edges should be slightly rounded and smooth.
The edges at the white arrows in the pictures of the actual parts need to be polished smooth so that the spring tension will pull the cocking ring past the timing delay as it should. The cocking lever can be pushed to the closed position operating the shutter.
A shop repair tech will probably not be willing to smooth these surfaces for a customer as the bench/shop time that will have to be billed will make it too expensive.
This cocking ring to delay timer operating contact is common if not the same for Compur shutters from the Rim Set to the final production of the Synchro Compur.
Last edited:
Correct CN-1210-000 to CN-1307-000 in post 37 since i can no longer edit it.
Do all these comments similar for a Copal 0 shutter? When and how often? Low speeds vs high speeds? Etc.?
yes.
Depends on age, usage, storage when not in use.
Low speeds for wear and dried lubrication, weak springs for fast speeds.
I have yet to see any make of shutter that had major differences between their smallest and their largest shutters, major differences from one brand to another are common.
Compur made in production changes that are moderate to major between their late 1940's Synchro Compur and their 1960's Synchro Compur. These changes are in the release mechanism, delay timer areas not the cocking or delay timing. My #1's problems seem to be in the press to focus area not the delay timing. I did file down the burs and wear lip with a needle file but it did not help. Taking a break from it for a while. Each shutter will need to be inspected to find what is causing its problem. I have another that runs fine with the face ring loose but will not run with the face ring tightened. The face ring is what hold the speed ring in place.
I found screw 211 in the blade controller operating lever 3/16 turn loose.
The release and flash sync levers had to be removed to access it.
The release and flash sync levers had to be removed to access it.
What page/illustration/table is this illustration [your listing #23] shown this in the shutter manual - I cannot find it.
regards
Tony
No, I simply remembered it wrong. CN-1307-000 is an exact match.
CN-1110-000 pdf page 50.
What lens is in your shutter?
A you may have figured out on page 44 in the Table Camera/Lens/Shutter a large group of Schneider lens without any camera listed use a CN-1210-051 for special and standard shutter with CN-1110-000 as supplemental.
The CN-1210-051 is the break down of the front plate and operating levers with CN-1110-000 being the internal shutter mechanisms. CN-1110-000 is a workhorse shutter modified and used in many medium format cameras and scaled up to #0 size for large format lens.
The CN-1210-051 is the break down of the front plate and operating levers with CN-1110-000 being the internal shutter mechanisms. CN-1110-000 is a workhorse shutter modified and used in many medium format cameras and scaled up to #0 size for large format lens.
Lighter fluid...Ronson
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- jtk
- Deleted
- Reason: Oops
lighter fluid-shade tree solvent--great great grandpa get by when shutters were all metal.
Do you still use a horse and buggy daily?
Do you still use a horse and buggy daily?
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