Mechanical table machine center is relatively strange to ordinary people, the reason is that we usually just pay attention to the appearance of the mechanical table, and for its internal use of the machine center is not very concerned about.
The following small series will introduce how to distinguish the mechanical movement is good or bad.
The first trick when you get a mechanical watch machine, with people who have never met the same, first look at the appearance of the person, and then look at his dress, you can initially judge his quality and taste;
And for the initial feeling of the machine center is the same, the first positive and negative look at its appearance, and then carefully look at it which can see each piece of plywood and each transmission parts processing level is exquisite, decorative grain is symmetrical, so that you can know the machine center from the appearance is a boutique,
And from this can judge the design concept and processing of the precision of manufacturing, on the contrary, the parts processing rough, even distorted deformation, the appearance of the ugly core performance is also well known.
Two recruit this time heart in a stop watch state, you can turn the arbor to bend machine heart, at the same time observe the watch-balance enhances hair spring system and escapement, when you turned the once at most three times (Swiss machine heart is a circle), the balance wheel balance spring system and escapement and started running, this step is to test the performance of the main drive system of the machine heart,
If not normal boot, the main reason is that the main driving wheel machine heart three recruit if balance wheel balance spring system and the timely start of escapement and working properly, you can continue to turn the handle shaft to the machine heart strings, and places need to be aware of so what time is it, the first is you can’t have wound to feel comfortable with difficulty and asymmetrical feeling,
The second is to pay attention to listen to the winding sound should be symmetrical can not have the sound of gnawing teeth, the last thing to pay attention to is the winding number can not be too much, generally in about 20 turns, this step is to test the winding gear performance of the machine center.
Fourth recruit pull handle shaft to the second leg, this machine is the heart of calendar dial out quickly, then attention should be paid to set aside the handle shaft to the second gear, gear to clear can obviously feel that already in place, and then turn the handle shaft speed-dial calendar ring, then need to focus on is the calendar ring under the drive of quick dial the tooth, each tooth should be very rhythmic skip,
A lack of rhythm, like swallowing dates, is a sign that something is wrong with the calendar.
Five recruit continue to send arbor to third place, also is the dial needle machine heart block, the minute hand when the arbor plucked, at this time the need to pay attention to similar to the first quarter, is still feel better, but more need to see is when two hands overlap to 12 point will have error, if you have any other interest can continue turning arbor let the minute hand ceaselessly to 24 hours later,
Note that the calendar rings bounce once. This is to see how well the calendar mechanism performs when it is actually working, not when it is flicking.
The sixth trick is the last step to test the performance of the automatic gear train of the machine center, the simplest way is to pay attention to the natural drop position of the automatic tuo, and then the vertical rotation of the motor center, if the automatic tuo always keeps the bearing unchanged, it shows that the automatic gear train performance is flexible, this is the automatic part of the most need to pay attention to.
The above is a small series for you to introduce the problem of identifying the mechanical watch movement is good or bad, more knowledge please pay attention to.
