Nonsense. Rubbish. I use shutters from the late 1950s to before WWI. They are accurate and still have the original springs.
Originally Posted by Tom1956
One thing you haven't had occur to you yet is: The shutter blades are often, if not always, steel. Steel can become magnetised. Magnetised shutter blades stick together. Stuck together shutter blades will make the shutter run slow.
You also have to actually clean the parts, with a brush and peg out all the pivot holes - not just slop them around in solvent. An ultrasonic will damage springs if they are left in long enough.
Clean the thing, assemble it correctly with degaussed blades, lubricate it properly, and unless it's badly worn or has been butchered by some half-baked autodidact the speeds will come bact to their marked values with gratifying accuracy.
Last edited by E. von Hoegh; 09-30-2013 at 10:29 AM. Click to view previous post history.