ClockWorks Press ATMOS Manuel - Sayfa 4

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INSTRUCTIONS ON THE REPAIR OF

ATMOS CLOCKS

To secure a good performance from the clock, it is essential

that the ATMOS be placed on a stable support and in an

absolutely horizontal position. The latter can be checked by

the built-in spirit level G (Figure 1) located in the base at the

front of the clock and also by the balance itself. It suffices if

the banking stem M which is fixed on the balance staff, is

Figure 1

Showing Front of Clock with Movement Removed.

centered over aperture L in the bridge through which it passes.

For repair work, follow these steps:

1. Check the horizontal position of the clock.

2. Check if power reaches the escapement by gently

sliding the locking lever to the left and thereby releasing

balance from its locked position; the operation of the pallets

can be observed through the small holes made for this puipose.

The holes are located on the front plate of the movement at

the top of the plate. Watch for a kicking action on the fork as

each pallet drops off an escape wheel tooth. This shows

whether there is power to the escape wheel.

3. Check if hands move quite freely.

4. Check condition of the motor. (See page 13)

Having made these four checks, lock balance wheel by

depressing and sliding the locking lever (B - Figure 2) from

left to right. Then remove hands by means of Tool 4 (Figure

5), also remove the dial and dial bezel. In the absence of the

factory-made hand removing tool, a suitable tool can be made

by converting a small hand removing tool for use on ATMOS.

The key requirement is that the plunger must be no larger

than 0.6 mm (.024"). The ATMOS minute hand must only be

removed using a hand removing tool. The minute hand shaft

is so small, that any other method will likely result in damage

to the shaft.

After removing the hands, it is worthwhile to check the

hands for balance. The hands must be perfectly

counterbalanced. A poorly poised minute hand will stop the

clock; a similarly faulty hour hand will cause variation of as

much as a quarter turn in the amplitude of the balance.

The movement is removed by unscrewing the two

mounting screws (one on each side of the movement) from

the mounting studs (Z - Figure 1).

When removing the movement, care must be taken not to

bend the fork, nor to let the gear-train run uncontrolled. Hold