Copal 3 Shutter: Cleaning and Adjusting Speeds by Swedging
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Copal 3 shutter repair. This Copal needed typical cleaning and lubrication. Also, some of the shutter speeds were not within specs. For leaf shutters such as the Copal 3 that do not have adjustable speed governors, you must “swedge” the speed cam to adjust each shutter speed. This means expanding metal from the speed cam to allow the control pin to be at the correct location. As you can see in the last photo, there are small indentations that correspond to each shutter speed and these are where the speeds are adjusted at the factory and in the field.
