Kiev 60 distinct band on left side of frame?

[hamradio]

I've got a little issue with one of my Kiev 60 bodies that I've seen exhibited in other cloth FP shutters. There's a very distinct 1/8" band of underexposure on the right side of every negative (originating from the left side of the film gate). If it was more evenly spread across the frame, like a gradient from light to dark, I'd adjust curtain tension. But I'm inclined to believe this isn't as much a tension issue as it is some sort of obstruction...the rest of the frame always has a perfect, even exposure. It seems to show itself most around 1/125-1/250...at 1/1000 it doesn't seem to be present.

I'm not sure if the first curtain is a little slow to get moving initially, or if the second curtain is catching up too quickly for the first part of its travel. Everything in this body works great, and it's a late 1990s model (if that even means anything..fit and finish are certainly sloppier than my '82 Kiev 6s). Curtain rollers run great and smoothly, slow speed escapement is perfect, and it hadn't even been opened up before I popped the shutter crate out of the body for a different repair. Any thoughts on what might be ailing it? I can post a scan of a neg if that's helpful.

 

[shutterfinger]

Place the negative upside down, emulsion side toward the lens. Now which side of the frame is the under exposure? What direction does the curtain run, right-left; left-right; top-bottom; bottom top?
Under exposure is a result of the shutter being fast, over exposure is a result of the shutter running slow.

 

[summicron1]

Place the negative upside down, emulsion side toward the lens. Now which side of the frame is the under exposure? What direction does the curtain run, right-left; left-right; top-bottom; bottom top?
Under exposure is a result of the shutter being fast, over exposure is a result of the shutter running slow.

what he's getting at is, perhaps the second curtain is bouncing at the end of its travel and double exposing a titch, or perhaps it is catching up with the first curtain before it gets to the end of its travel.

either way, service is in store, adjusting curtain tension will not be a cure.

 

[hamradio]

I posted too soon.

I was looking at the negs hanging to dry, before I threw them on the light table, not paying attention to which side was the emulsion. The problem is at the end of the curtain travel, not the beginning like I previously thought/said. I'm pretty certain the two little spring brakes at the end of the travel are problematic...I'll tear the shutter crate out of the body and adjust them to provide a little less resistance to the curtains as they come to a rest.