Contax I ribbons

Yes I think the central spring would have to be turned otherwise it is tensioning by undoing itself and then the central hole in the spindle would be in the wrong place.

I fear all this might turn me dyslexic!
 
Erik van Straten said:
Isn't it possible on a Contax II/III assembly to move the right spring to the left and the left spring to the right and to leave the central spring where it is and to install the whole assembly into a Contax I? The central axle seems to fit into a Contax I without much alteration when it is turned left to right, but maybe the central spring has to be turned then too.

On the picture of Deklari it seems as if the central axle on a Contax I is the same as on a Contax II/III but simply turned around.

Erik.
Click to expand...

The holes for spring anchoring are not symmetrical.. IMG_3452a.jpg
 
On the picture of Deklari it seems as if the central axle on a Contax I is the same as on a Contax II/III but simply turned around.

Erik.[/quote]

If modify central axle ... IMG_3453a.jpg
 
How about using a Contax II/III (or, more likely, a Kiev) axle, turning it left to right, then drilling new holes in it so that they match the Contax I axle spring holes locations ?

The axle is thin but there are extra-small (micrometrical) precision drilling tools out there.
 
Erik van Straten said:
Aren't there other solutions? Gluing, clips?
Click to expand...
The axle ends are put to some heavy friction motion when you fire the shutter. Anything glued at the end of the axle won't stay in place for long. In my opinion.

The axle is probably not made of steel, so we can't think of adding some material at its ends by high voltage soldering, then re-machining the ends so they have the good shape for the Contax I shutter crate. But, who knows.
 
Highway 61 said:
Anything glued at the end of the axle won't stay in place for long. In my opinion.
Click to expand...

Hmm, two component glue and thread of solid fabric, silk? I think you can fix the end of a spring to the axle with that.

Or fixing the end of the spring with tight, small plastic rings? I often repaired things with small pieces of my sons Lego.

Erik.
 
Highway 61 said:
How about using a Contax II/III (or, more likely, a Kiev) axle, turning it left to right, then drilling new holes in it so that they match the Contax I axle spring holes locations ?

The axle is thin but there are extra-small (micrometrical) precision drilling tools out there.
Click to expand...

It will work. But much easy just re-install 2 springs on old Contax I axle.
 
Highway 61 said:
How about using a Contax II/III (or, more likely, a Kiev) axle, turning it left to right, then drilling new holes in it so that they match the Contax I axle spring holes locations ?

I think the main question is how to avoid spring re-installation by modify Kiev/Contax II roller.
I can try cut and modify both ens of Kiev axle and look how it fit in Contax I.
Click to expand...
 
Deklari said:
I think the main question is how to avoid spring re-installation
Click to expand...

I agree, for me this is the crux of the matter, spring installation without distortion will be very, very hard.

Collectively we will have a eureka moment sooner or later, it just hasn't happened yet!

Michael

(PS, I reckon the axle is steel. Looks like 2mm. It wouldn't be too difficult to make one but we would then be back to the problem of spring installation from scratch.)
 
Dralowid said:
I agree, for me this is the crux of the matter, spring installation without distortion will be very, very hard.

Collectively we will have a eureka moment sooner or later, it just hasn't happened yet!

Michael

(PS, I reckon the axle is steel. Looks like 2mm. It wouldn't be too difficult to make one but we would then be back to the problem of spring installation from scratch.)
Click to expand...

What if modify a holder for the axle in the shutter?
 
I think there is room and it makes a lot of sense.

I wonder...the early Contax I with a dimple does not have the same tensioning device as the one we have been looking at. From what I can see it is on the other side and hidden by the cover for the sprockets. It might be held by some sort of concentric cam (or just a screw).

I haven't pulled this camera apart yet, having two in bits seemed a recipe of disaster and I couldn't see how it would help. I might do so to have a look but I wonder why it was changed? Accessibility maybe?

Does the Kuc book say anything about this?

Michael
 
Erik van Straten said:
I do not like the tension setting of the Contax I. The aluminium of the shutter crate is in fact too soft for the screws that hold the hatch. You need bigger screws every time.
Click to expand...
The same with the Contax II/III / Kiev shutter crate...

If the Contax II/III / Kiev drum axle is made of real steel, its ends can be modified by adding some material with a precision high voltage soldering unit, then re-machining the ends so that they fit the Contax I shutter crate.
 
I couldn't resist taking a quick look at the 'dimple' camera.

Seen from the back.

Left hand side. This is not a tensioning device, it is simply a bearing.

IMG_2849 by dralowid, on Flickr

Right hand side. This, I guess, is the tensioning device, hidden behind the cover over the sprocket rollers. Not immediately obvious how it works

IMG_2850 by dralowid, on Flickr

I will put it back together now.
 
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