What are iris pins made of? Can I buy some?
What are iris pins made of? Can I buy some?
Steel, but I have seen some of yellow copper too in old equipment.
Normaly the pins are connected to the blades.....
So if you have lost one or two you have a problem.
You could try to make one or two of those pins and glue them into place with very little glue or solder them together in an emergency, but I have never tried that in my 30 odd years of being a repairman.
Replacing those blades will be the best.
Peter
Sorry about that big picture. How about a link to my blog where it resides?
http://newlightfarmer.blogspot.com/2009/07/shutter.html
Is it actually possible to buy new blades? Would it be worth the money to send it away to Grimes to have fixed?
Grimes could be a good adress for it, you could send them an email with this photo and see what they have to say...
This is new territory to me but with patience one could repair those blades.
Unfortunately for you I am not in Holland right now, otherwise I would tell you to send them to me for repairs. (I ma back in august)
You will need a fine lathe to make the steel pins and than press-fitt them into the blades.
So they are repairable I think.
Is the lens worth it ? How much is it worth to you ?
The set-up time would be the big part, making a jig for it so you have a plate with the right hole to fit the pin at the right depth and making the pins themselves.
Press fitting and finishing is just a couple of minutes after that for each.
Peter
What shutter is it? It may be cheaper/easier to just buy another one.
Duh! next time I'll look before I type. I would say find another shutter.
looks as though the blades are metal, so what about some brass rod the diameter of the holes with some think walled tube that telescopes over the rod the for the larger diameter section.
Other option if you have a dremel would be to start with the brass rod the correct larger diameter and put it into a cordless drill spinning it and use the light weight cutoff wheels in the dremel to turn the diameter down. It's a kludge that I've used that mimicks a tiny lathe to some degree.
Very small and fiddly to work with, but by the looks of things, you're not perturbed in that arena.
Then you could attach it with soft solder applied with a small hot air pencil if you don't have a soldering iron handy
Regular solder as used in electronics will not last and will not hold.
The best thing you can do is making those pins and heat them up and then press the top part like a rivet.
But you will need the set-up and the equipment for it.
Peter
The lens is a Unicum 12 inch f 10. It came with a junker parts folding camera, a Pony Primo No. 6. The camera was a 5x7 and did not have a back. The lens has two pistons and is very nice looking. It is now wide open and will have to stay that way for the present. The shutter works. It looks a lot like the one on the 4x5 Primo in my blog but larger. I like them and will fix it somehow someday or I'll send it to you Peter. I think it is worth making it function corectly.
The dial at the top has click stops for T B I 2,5,25,50,100 and they are all different speeds.
Last edited by Michael Carter; 12-Jul-2009 at 13:57. Reason: Let Peter fix it
The lens is welcome at my place when I am back in Holland, please send me a PM somewhere in August so I can give you my adress.
Peter
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