If the bob goes up it speeds the clock up . The regulating nut can be seen at the bottom of the bob . So if you turn the nut from left to right it will speed the clock up . From the right to left slows the clock down . Make sure the bob is sitting on the nut when you do this . Some bob's stay where they are and you have to slide it down to sit on the nut . Make sure to set the clock on the real time before you walk away from it . Call me if there's any doubt . Sometimes it can be tricky or take awhile but you can do it !