- Joined
- Sep 8, 2011
- Messages
- 71
- Format
- Large Format
Thanks. I always wondered if it was just a number of turns or if they somehow had a little finger that was pushed by the leading edge of the film. I remembered seeing something in the manual that said some take up spools wouldn't trigger the camera to advance the film when the handle was turned.
I was wondering if something similar was going on in the C330 because there's a spring loaded wheel that bears on the film. So I thought they might be measuring the total thickness of the film/paper rolled up on the take up spool. And there was some mention in the manual about the system not working reliably with some take up spools. Oh well...
Does anyone have a recommendation for someone who could do a good CLA on the C330?
As I posted earlier, this is usually due to the back not being fully latched - use both thumbs to press!That makes sense. On my Kodak medalist there's a little sharp toothed wheel that contacts the film very close to the edge and it's on the film side so pretty non-slip.
On the Mamiya the wheel is on the end of a spring loaded movable shaft and it bears on the paper side, so if it were to slip or stick it could be the culprit. And come to think of it the first time this happened the counter didn't move at all and I spun the crank around a few times after the film was completely wound up and suddenly the counter started to move.
Now I'm starting to wonder if maybe the "multi" switch works by just disengaging the rotating wheel.
I think it must be powered by elves.
It is a simple dichotomyThanks. That all starts to fall in place now. Next time I load film I'll see if I can figure out exactly how the degree of closure (or non-closure as the case may be) interacts with how the wheel does or doesn't engage the film.
I just like to actually figure these mechanical things out.
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