Mechanically speaking the moon dial exists in conjunction with timekeeping devices grandfather clocks most frequently simply because the passing of the moon is easily relatable mathematically and mechanically to the passing of time.
Grandfather clock moon dial repair.
Find the click spring.
Many of the older grandfather clocks or english tall case clocks as many people called them had a painting on the dial along side of the moons each dial has 2 moons to keep the calendar accurate.
Sometimes the moon dial on a grandfather clock refuses to turn.
Be certain the weights are pulled up.
Open the glass and push gently on the dial.
Many grandfather clocks incorporate a moon dial.
If the pendulum is stuck open the glass and disentangle the clock hands.
To fix this problem open the door or panel by the clock face.
A one half rotation of the disk occurs every 29 5 days which is one lunar cycle.
Some grandfather clock moon dials spin freely and others have a click stop so you will hear the moon dial clicking as it turns.
Now reset the moon dial with the observed.
Step 5 the moon dial.
The click spring is located just behind the moon dial itself.
Turn it slowly to the current phase.
Depending on how basic or advanced your moon dial is it may be more or less detailed or advanced.
This sophisticated piece of technology is designed to show the shape of the moon as it appears in the sky as well as the lunar date.
Grandfather clock moon dials consist of a round disk displaying two pictures of the moon.
The moon dial on a grandfather clock also gave the manufacturers of the clocks to add a personal touch to their grandfather clocks.
Sometimes the pendulum can disrupt the grandfather clock movements.
Observe the current phase that the moon is in.
If you have a grandfather clock with moon phase follow these instructions.
Minutes hours and days.
Ways to clean a grandfather.
If the clock is running slow move the pendulum up the shaft and if it is running fast move it down.
Stuck pendulum and moon dial problems.
To set moon dial apply slight pressure with your fingers to the front of the moon dial.
If you re repairing a grandfather clock s moon dial start by checking the phase.