|Simplicity by Steve Stoetzer|
Built a Simplicity clock per your plans. Clock runs well, but is several seconds fast/minute. I have tried adding weight to the bottom of the pendulum, but it does not make a significant difference. I was wondering if minimally reducing the diameter of the escape wheel would slow the clock down and wanted your advice in case it would be a move in the wrong direction. Attached are several pics of the clock in case you're interested. It was a very enjoyable project.
Thanks much for your help,
Clayton emails: "Beautiful job, Steve. I especially like your turned weights. Very classy! You did a beautiful job throughout...and that may be part of your problem!
First of all, some mechanisms run fast of slow for the first few weeks. So I always recommend not doing anything for four to six weeks except enjoy the clock's beautiful song and not worry about the accuracy.
After that break in period, if it is still running too fast, you have some choices. The first would be to decrease your drive weight. I actually have the suggested drive weight WAAAYYY too high. The clock should run on about three pounds, but I suggest more because it is a beginners clock and I want everyone - no matter how bad their craftsmanship - to hear their clock run. It's also why I state that the drive weight for each clock will vary.
And this is where your great craftsmanship comes in - maybe because your techniques and accuracy and precision were so good, there's not enough internal friction to be overcome by the excess amount of drive weight - thus making your Simplicity run fast.
If that is not the problem then you'll need to increase the length of your pendulum shaft.
The third treatment you say you have already tried, and that's to add weight to the bob, thus making the apparent center of gravity for the pendulum a bit further away. And also absorbing some of that excess drive weight.
So start with; #1 waiting a while, then #2 reduced the drive weight.
You'll get her purring along just fine and she'll eventually be within a few minutes a day in accuracy.
Congratulations on your fine craftsmanship.