vickersdc said:
.....If I were to start from scratch, how would I set about adjusting the curtains (making the assumption that I hadn't marked anything at all when I disassembled it)?
I knew this bit would be the undoing of this project! Hope you can help?! 😎
Cheers, David.
David
It's really hard to describe the procedure without pictures
🙂
You have to make sure that the curtains are in proper place before attaching the crate back to the plate. The 1st blind should be reeled in a certain way, and its lath should overlap with the lath of the 2nd blind. The overlapped laths should be somewhere past the edge (about 2-4) from the left edge (adjacent to the shutter drum) of the film gate. Actual position may slightly differ based on actual blind or ribbon lengths.
Then make sure that the coupling hole on the drum is placed so that it will catch on the coupling pin. The pin's position is critical. If this is displaced even by 1mm, chances are you could lose "B", or have the shutter stop over the frame, or lose one edge of the frame from a shutter which closes too soon or too short.
The restricting gear has to properly positioned too. Make sure that it's at the end of its turn before you place the shutter drum. And be certain that the gear's is at its "end" which will allow the drum to turn the other way for the shutter to travel to the other side.
There is also a pulley over the drum. You will probably have noticed by now that this pulley turns freely over the drum. There is a curved slot in it which
the coupling pin goes through. There is also a stop there which allows the coupling pin to turn it . Make sure that this pulley is also properly positioned over the drum slot before the shutter crate is restored to the top plate.
It's really hard to get everything right at first attempt. You'll have to look into a lot of parts, checking their relative positions, before you put everything back.
Then once together, you'd have to check if they are all engaging properly. Any form of displacement, no matter haw minor, will often cause the shutter to malfunction.
Jay