Minolta93
Member
@Minolta93 that is a great question. I was wondering too, and I have found several online services that can 3D print metal parts at extremely high precision (0.02 mm resolution) using wide variety of metals, even titanium, and their prices are getting lower quite rapidly. I have not tried any of them personally, however, but it is evident to me that this industry is evolving quickly. So I am hopeful.
Yes I've seen those as well and could be a great idea for camera repair, among other things. It would certainly help to have the ability to design parts that you'd need, though. The thing about metal printing is the prints seem to be quite porous due to the nature of the sintering process that they use. Perhaps these parts may not be a good fit for all applications, but certainly they'd have their uses.
And besides metal, practically any part on a camera that's made of polymer could be printed at home, and even things that were metal may be replaced if needed. I have seen people 3d print a part and then use that to create a mold and cast it from aluminum or brass at home.
Although the component is called a "spring" in the manual, its not a typical coil spring (see: https://retinarescue.com/images/rangefinder/07advance.jpg), and it wouldn't be simple to fabricate. You can purchase the part from Micro-Tools.de but the price is 56 Euros plus shipping. It is easier to locate a parts donor camera and steal the spring from it.
I figured it was some sort of leaf spring--is it just that small bent piece of metal there? I'm sure someone who has experience fabricating these parts could do it, but as for the average person trying to fix a camera, I'm not so sure. Although that image is different from my Retina IIa, mine is a type 150 as far as I know looking at the serial number, and the film advance doesn't have a lever, just a knob. I think the camera was produced in 1939. The spring is probably similar between models, right?