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Clocks are adjusted to accurate time in our shop or at the factory. However, any time a pendulum clock is moved, it is likely to get slightly out of regulation and run fast or slow. This is easy to correct, and the clock will remain constant once you have readjusted it in its new environment. Most pendulum clocks have a rating nut at the bottom of the pendulum. If you turn the nut to the right (clockwise), raising the pendulum bob, the clock will run faster. Turning it to the left or lowering the pendulum bob will slow it down. Just remember “lower is slower.” Generally, one turn of the nut will affect the timekeeping by approximately one-half to one minute a day. Remember, the round pendulum bob must move down with the rating nut to affect the timekeeping. Most clocks are accurate within one to two minutes a week when carefully regulated. Some antique French clocks have a rate adjuster in the dial just above 12 o’clock. This is adjusted by turning the point with a small key. Usually turning to the right advances the rate and to the left slows the clock. Try adjusting it in 1/2 turn increments until correct.

If you feel the sound of the strike or chime is not right, you can adjust it simply by bending the arm on the strike hammers to bring the hammer head closer or farther away from the rod or bell. Usually, you should have about 1/4″ clearance when the hammer is at rest, so that it bounces away after striking the bell or rod, leaving it clear to resonate. Obviously, the harder the hammer hits, the louder the sound.

Should your clock strike the wrong number at the hour, count the number of strikes and move the hour hand to the correct number. The hour hand can move either forward or backward, but remember not to move the minute hand backward. If your clock strikes the hour at the half-hour, you can reset it by passing by one half-hour without pausing to allow the strike to play. Then adjust the hour hand to match the number that it strikes.

When setting the time on an antique clock, you should move only the minute hand forward, stopping at each hour and half-hour to allow it to strike before advancing it to the next half-hour. If it has a quarter-hour chime , you should also pause at the quarter-hour points to allow the chime to complete its cycle. New clocks with two winding holes should be set in the same manner as antique clocks. New clocks with three winding holes can be set by moving the minute hand backward to the correct time. The chime will automatically correct its cycle within an hour after you have set the clock. If you have a calendar or moon dial on your clock, advance it forward only.

The ticking sound of a properly balanced clock will be as even and consistent as a metronome as the pendulum moves from side to side. When a pendulum clock stops running, it’s usually because it’s “out of beat.” This happens if the clock is not perfectly level, and can be easily corrected. Pull the pendulum to one side and release it. As it starts to swing, you should hear a ticking sound at each end of its arc. If the tick is irregular, with a galloping or uneven sound, the clock is not in beat. To correct this problem, begin by making sure that all points are wound and the pendulum is hanging correctly with nothing obstructing its path. Anything that interferes with the pendulum’s arc will usually stop the clock. An out-of-beat clock is corrected by levelling the clock case. Tilt the clock slightly to the left or right as you listen carefully to the ticking sound. You will notice that the ticking becomes more consistent as the case is levelled. On mantel clocks, place appropriate shims under the base to hold the case in a level position. If your clock stops after a while, just start the pendulum again and repeat the levelling procedure until the beat is as even as possible. Once you master this technique, you’ll have no trouble setting up any pendulum clock in the future.

Most clocks need to be wound once a week. If you have a weight-driven clock, check the cable or line is not tangled and is properly seated in the groove in the pulley. Generally, the heaviest weight goes on the right side, the next heaviest weight on the left, and the lightest one in the centre. Many clocks use similar weights on the left, or left and centre. Always put the heaviest weight on the right. When winding a weight-driven clock, turn the Key slowly to raise the weight. Make sure the cable doesn’t tangle, and stop winding just before the pulley at the top of the weight moves out of sight. When winding a spring-driven clock, turn each winding point until it is tight, and you can feel that it’s at the end of its travel. If you stop short of a full wind, the clock may stop running or chiming before it should.