Getting a movement started when stopped using autowind

[italiansub]

Question is, what determines whether a watch starts right up, or needs a bunch of shakes?? Is this a servicing issue?? What would be serviced to improve?

For instance -- I have 4 ETA 2824 based watches...all similar in age...two of the movements start right up when picked up...maybe two or three shakes and the second hand is ticking away. But, the other two movements take about 20 "back and forth" movements before they start up. The upside is that they keep going for much longer...presumably from the added energy store from all the winding. All have similar aged and serviced mainsprings

Sent from my iPhone using Tapatalk

[SSTEEL]

Usually a beat error is the cause for a movement not to fire up after at least 8 winds.  When there is no beat error, and the movement is running perfectly, the movement usually fires up into action after 5 to 8 manual winds.

[oldhippy]

With many Seiko auto's you can't wind them up, the only way to get them starting up is to give them a few shakes. It doesn't mean there's anything wrong. 

[italiansub]

I wasn't clear...starting the watch by winding manually works fine - about 5-8 turns as steel said. But starting it with a few shakes takes much longer on some movements. I'm curious why...is it an indication of some servicing need?


Sent from my iPhone using Tapatalk