How do you work multiple times at YoVille factory

you can only work every 6 hours, but after that time is up you can go back to the factory and click the big machine beside the worker-avatar (the one that never moves) and you sould get 200+ coins again :) (the number of coins you get when you work depend on how many "neighbors" you hav, in other words, how many of your myspace/facebook friends are on yoville as well) hope this helps :)