Setting Topcon Besseler shutter curtain tension.

[tunalegs]

I recently acquired a Topcon Besseler B reflex. It needs some cleaning and adjustment, but what I can't figure out is how to set the shutter tension. I see two screws under the base plate, which are aligned with the shutter take up spools, and so presumably set the tension on the shutter. But I don't see any locking mechanism for them. No springs, no grub screws, etc. What's going on here?



I'll get a photo if it helps.


Thanks.

 

[fredfolque]

I recently acquired a Topcon Besseler B reflex. It needs some cleaning and adjustment, but what I can't figure out is how to set the shutter tension. I see two screws under the base plate, which are aligned with the shutter take up spools, and so presumably set the tension on the shutter. But I don't see any locking mechanism for them. No springs, no grub screws, etc. What's going on here?



I'll get a photo if it helps.


Thanks.

Hi tunalegs, i am having the same doubt and issue, I ve unscrewed and set the tension of the curtains but now I can’t figure how to lock it, how did you fix it?
Thanks,