Model Forum / General / Models / November 2007

I have just completed my first clock, a simple non-fusee, recoil
escapement, timepiece to a design by Colin Thorne.After the initial
euphoria that it actually worked, and ran for 8 days at a winding, I
have got down to regulating it.

My question for the Group clockmakers is what accuracy of timekeeping
should I expect?  Careful measurements over the last week show that it
ran progressively more slowly as the spring ran down, the total
variation in rate over 7 days being about 4 minutes. For the current
setting of pendulum, if I set the hands correctly when  fully wound,
it shows 4 minutes fast at mid-week, then correct again after 7 days.
Obviously, I could play around with the pendulum length to make the
error - 2 minutes at the beginning, +2 minutes mid-week and -2 minutes
at the end of the week if I fiddled some more.

Is this good, bad or indifferent?

Mike