- Jan 11, 2011
Let's say I rebuild an 8 day cuckoo that runs on 1260g. When testing, what are you happy with as a minimum weight that it runs on? How much less than the given factory weight?
That depends on what the something is. Perhaps a better way to evaluate if the weight is sufficient for testing is to check that there is sufficient overswing with the factory weight. The smaller the weight the less the overswing and when the overswing approaches zero the clock will become unstable and is about stop. This then begs an answer to the question how much overswing is enough. Someone here suggested that if the overswing is visually obvious then it is probably OK.So is 1000 good for something that takes 1264
I believe so. By whatever method that seems to work, we need to make sure the clock will run for a long time after it leaves the shop even if neglected by the owner. When I rebuild a 30 hr. wooden works movement that normally runs 3.5 lbs. I test with 1.0 lb. 1.5 lb. and 2.0 lb. weights. 1.5 is great, over 2.0 and something is probably not up to par. 1.0 lb. and it run but will probably stop before striking. I like to run my own on 2.5 lb. OG weights to reduce stress on 190-year-old wooden clocks.It sounds as if Powerstroke is wanting to duplicate the same test as is done with spring driven movements where you wind a little just beyond the springs shuffle.
The weight grew as the automation grew.Note, the clock factory's shiped 1260gm weights for many years then it gradually shifted to 1500. They didn't do this for no reason. Willie X