Discussion in 'Clock Construction' started by janekp, Mar 20, 2019.

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  1. janekp

    janekp Registered User

    May 21, 2011
    Now about the drive of the gait mechanism. The drum -spring barrel -(z = 82) with the spring drives the intermediate wheel, the toothed wheel (pinion = 10, wheel z = 80) and the pinion pinion (z = 10). The above-mentioned intermediate wheel performs one revolution for 8 hours. One rotation of the drum gives ~ 2.2 days of walking.
    Picture 1 et 2 (side viev)

    The axis of the drum enters the central hole, previously described in http: //zegarkiclub.p..-rezerwy-chodu/, differential, driving one of its discs. The second disc is driven by a protrusion of the drum, affecting the pin fixed on it.
    Picture 3
    The result of the comparison of these revolutions is the variable position of the yoke visible on the right side of the assembly.
    Picture 4
    The movement of the yoke follows the lever based on the pin, under the influence of a spiral coil, against the edge of the yoke. On the axis of this lever, on the other side of the plate, a long lever is attached, the end of which will indicate the state of the reserve of gait on the periphery of the middle plate.
    Picture 5
    On the center of the intermediate wheel, there is an additional gearwheel that will be used to drive the moonphase indication unit,

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  2. janekp

    janekp Registered User

    May 21, 2011
    Continuate :
    The indicator element here will be a ball with a blackened half of the circumference, imitating the appearance of the moon. Its full turn should last for a synodic moon, or 29.530589 a day. Although I found a few numbers whose ratio in a great approximation gives this value, but the implementation of such a transmission is almost impossible to achieve in normal conditions. These are numbers: - 25101: 850 = 29.530588.

    Spreading the factors to the left, we will have the number 2789 and the logic would indicate that one of the gears should have that number of teeth. I can not imagine building such a wheel in the construction. The diurnal error of such a structure would occur after several thousand years. And even if the clock continued to walk it is probably after such time under the influence of nearby earth planets and by giving off the energy of the earth that causes tides, the above-mentioned period will undoubtedly not be the same. My ambitions do not go so far and I decided to implement gears that give me an error in the day, eg only after only 122 years.

    For this purpose I used the abovementioned additional wheel on the axis of the intermediate disc having 32 teeth and a full turn performed in 1/3 of the day.

    And then according to the scheme: -

    The difference between the real synod and the completed period is:

    29.531250 - 29.530589 = 0.000661 days. This means that in one period "my" moon would have been hurried for such a part of the day. So to complete the daily error must take place

    1: 0.000661 = ~ 1512,86 periods. And that each period lasts about 29.53 days, so the daily error will occur after: - 1512,86 x 29.53 = 44674,74 days. Dividing it by the number of days in a year: -

    44674,74: 365.25 = around 122.3 years.

    Counting in the same way in watches where the most often used wheel with 59 teeth (driven by 1 tooth per day) for the drive of the shield with two moons, we calculate that the assumed period for this mechanism is 29.5 days. Keeping the calculations as above, we obtain that the daily error will occur after about 2 years and 7 months. And in such a period of time most users violate the original settings of the watch because, for example, he forgot to shoot or effectively the battery sat down.

    View attachment 524379 View attachment 524380 View attachment 524381

    View attachment 524382 View attachment 524383 View attachment 524384

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  3. janekp

    janekp Registered User

    May 21, 2011
    After posting http: //zegarkiclub.p.plla-tourbillona/ about the way of accumulating energy lost in the tourbilion, I can already show the very heart of the created clock, or three-axial tourbilion. After applying the above-mentioned method, the gait mechanism began to work vividly. Now, try to work on adjusting the gait to get that accuracy. The balance amplitude is a bit too big - when the springs are fully spun, the balance is close to "striking", ie it makes a close rotation from the center of the oscillation and may hit the trigger with the finger of the anchor in the extreme position of the anchor. Admittedly, there will be additional burdens, i.e. activating runout or accumulating energy for the calendar operation. However, these are not continuous loads and who knows whether or not you will have to give a slightly weaker span. The view will be in "four scenes". Unfortunately, I did not think to stop the clock when taking pictures, therefore the balance screws are visible as a mist. I will improve at the next opportunity
    photo 1 and 2
    There are two - "crown" teeth of rings and cooperating teeth of the subsequent parts
    . a visible balance on the side and deep in the pinion of the escapement wheel cooperating with a stationary wheel associated with the first element. Picture3
    A moving balance in motion, an escapement wheel with a pinion bearing bushing (http: //zegarkiclub.p.plla-tourbillona/) and two rubies for decoration. photo 4
    The blue one is the titanium load-bearing for the first link and the pinion that drives the balance cage.

    Next, I am waiting for some (larger) work to describe the operation of the calendar and I will probably give up too much description. Unless someone clearly wishes, we will bargain!

    Even the hints, shield and housing do not have a definite shape, but I think that by the end of May, I will dress in a tasteful outfit.

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    wcampbell likes this.

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